Updating changelog + build for 2.7.8

Overhaul post-message fanout. Closes PR #37.

.dockerignore

@@ -29,6 +29,7 @@ frontend/src/test/
 # Docs
 *.md
 !README.md
+!LICENSES.md
 
 # Other
 references/

.gitignore

@@ -8,8 +8,14 @@ wheels/
 # Virtual environments
 .venv
 frontend/node_modules/
+frontend/package-lock.json
+frontend/test-results/
 
-# reference librarys
+# Frontend build output (built from source by end users)
+frontend/dist/
+frontend/.eslintcache
+
+# reference libraries
 references/
 
 # ancillary LLM files

.python-version

@@ -1 +0,0 @@
-3.12

AGENTS.md

@@ -0,0 +1,437 @@
+# RemoteTerm for MeshCore
+
+## Important Rules
+
+**NEVER make git commits.** A human must make all commits. You may stage files and prepare commit messages, but do not run `git commit`.
+
+If instructed to "run all tests" or "get ready for a commit" or other summative, work ending directives, run:
+
+```bash
+./scripts/all_quality.sh
+```
+
+This runs all linting, formatting, type checking, tests, and builds for both backend and frontend sequentially. All checks must pass green.
+
+## Overview
+
+A web interface for MeshCore mesh radio networks. The backend connects to a MeshCore-compatible radio over Serial, TCP, or BLE and exposes REST/WebSocket APIs. The React frontend provides real-time messaging and radio configuration.
+
+**For detailed component documentation, see these primary AGENTS.md files:**
+- `app/AGENTS.md` - Backend (FastAPI, database, radio connection, packet decryption)
+- `frontend/AGENTS.md` - Frontend (React, state management, WebSocket, components)
+
+Ancillary AGENTS.md files which should generally not be reviewed unless specific work is being performed on those features include:
+- `app/fanout/AGENTS_fanout.md` - Fanout bus architecture (MQTT, bots, webhooks, Apprise)
+- `frontend/src/components/AGENTS_packet_visualizer.md` - Packet visualizer (force-directed graph, advert-path identity, layout engine)
+
+## Architecture Overview
+
+```
+┌─────────────────────────────────────────────────────────────────┐
+│                         Frontend (React)                         │
+│  ┌──────────┐  ┌──────────┐  ┌──────────┐  ┌──────────────────┐ │
+│  │ StatusBar│  │ Sidebar  │  │MessageList│  │  MessageInput   │ │
+│  └──────────┘  └──────────┘  └──────────┘  └──────────────────┘ │
+│  ┌────────────────────────────────────────────────────────────┐ │
+│  │      CrackerPanel (global collapsible, WebGPU cracking)    │ │
+│  └────────────────────────────────────────────────────────────┘ │
+│                           │                                      │
+│                    useWebSocket ←──── Real-time updates          │
+│                           │                                      │
+│                      api.ts ←──── REST API calls                 │
+└───────────────────────────┼──────────────────────────────────────┘
+                            │ HTTP + WebSocket (/api/*)
+┌───────────────────────────┼──────────────────────────────────────┐
+│                      Backend (FastAPI)                           │
+│  ┌──────────┐  ┌──────────────┐  ┌────────────┐  ┌───────────┐  │
+│  │ Routers  │→ │ Repositories │→ │  SQLite DB │  │ WebSocket │  │
+│  └──────────┘  └──────────────┘  └────────────┘  │  Manager  │  │
+│        ↓                                          └───────────┘  │
+│  ┌──────────────────────────────────────────────────────────┐   │
+│  │              RadioManager + Event Handlers               │   │
+│  └──────────────────────────────────────────────────────────┘   │
+└───────────────────────────┼──────────────────────────────────────┘
+                            │ Serial / TCP / BLE
+                     ┌──────┴──────┐
+                     │ MeshCore    │
+                     │   Radio     │
+                     └─────────────┘
+```
+
+## Feature Priority
+
+**Primary (must work correctly):**
+- Sending and receiving direct messages and channel messages
+- Accurate message display: correct ordering, deduplication, pagination/history loading, and real-time updates without data loss or duplicates
+- Accurate ACK tracking, repeat/echo counting, and path display
+- Historical packet decryption (recovering incoming messages using newly-added keys)
+- Outgoing DMs are stored as plaintext by the send endpoint — no decryption needed
+
+**Secondary:**
+- Channel key cracker (WebGPU brute-force)
+- Repeater management (telemetry, CLI commands, ACL)
+
+**Tertiary (best-effort, quality-of-life):**
+- Raw packet feed — a debug/observation tool ("radio aquarium"); interesting to watch or copy packets from, but not critical infrastructure
+- Map view — visual display of node locations from advertisements
+- Network visualizer — force-directed graph of mesh topology
+- Fanout integrations (MQTT, bots, webhooks, Apprise) — see `app/fanout/AGENTS_fanout.md`
+- Read state tracking / mark-all-read — convenience feature for unread badges; no need for transactional atomicity or race-condition hardening
+
+## Error Handling Philosophy
+
+**Background tasks** (WebSocket broadcasts, periodic sync, contact auto-loading, etc.) use fire-and-forget `asyncio.create_task`. Exceptions in these tasks are logged to the backend logs, which is sufficient for debugging. There is no need to track task references or add done-callbacks purely for error visibility. If there's a convenient way to bubble an error to the frontend (e.g., via `broadcast_error` for user-actionable problems), do so, but this is minor and best-effort.
+
+## Key Design Principles
+
+1. **Store-and-serve**: Backend stores all packets even when no client is connected
+2. **Parallel storage**: Messages stored both decrypted (when possible) and as raw packets
+3. **Extended capacity**: Server stores contacts/channels beyond radio limits (~350 contacts, ~40 channels)
+4. **Real-time updates**: WebSocket pushes events; REST for actions; optional MQTT forwarding
+5. **Offline-capable**: Radio operates independently; server syncs when connected
+6. **Auto-reconnect**: Background monitor detects disconnection and attempts reconnection
+
+## Intentional Security Design Decisions
+
+The following are **deliberate design choices**, not bugs. They are documented in the README with appropriate warnings. Do not "fix" these or flag them as vulnerabilities.
+
+1. **No CORS restrictions**: The backend allows all origins (`allow_origins=["*"]`). This lets users access their radio from any device/origin on their network without configuration hassle.
+2. **No authentication or authorization**: There is no login, no API keys, no session management. The app is designed for trusted networks (home LAN, VPN). The README warns users not to expose it to untrusted networks.
+3. **Arbitrary bot code execution**: The bot system (`app/fanout/bot_exec.py`) executes user-provided Python via `exec()` with full `__builtins__`. This is intentional — bots are a power-user feature for automation. The README explicitly warns that anyone on the network can execute arbitrary code through this. Operators can set `MESHCORE_DISABLE_BOTS=true` to completely disable the bot system at startup — this skips all bot execution, returns 403 on bot settings updates, and shows a disabled message in the frontend.
+
+## Intentional Packet Handling Decision
+
+Raw packet handling uses two identities by design:
+- **`id` (DB packet row ID)**: storage identity from payload-hash deduplication (path bytes are excluded), so repeated payloads share one stored raw-packet row.
+- **`observation_id` (WebSocket only)**: realtime observation identity, unique per RF arrival, so path-diverse repeats are still visible in-session.
+
+Frontend packet-feed consumers should treat `observation_id` as the dedup/render key, while `id` remains the storage reference.
+
+## Contact Advert Path Memory
+
+To improve repeater disambiguation in the network visualizer, the backend stores recent unique advertisement paths per contact in a dedicated table (`contact_advert_paths`).
+
+- This is independent of raw-packet payload deduplication.
+- Paths are keyed per contact + path + hop count, with `heard_count`, `first_seen`, and `last_seen`.
+- Only the N most recent unique paths are retained per contact (currently 10).
+- See `frontend/src/components/AGENTS_packet_visualizer.md` § "Advert-Path Identity Hints" for how the visualizer consumes this data.
+
+## Path Hash Modes
+
+MeshCore firmware can encode path hops as 1-byte, 2-byte, or 3-byte identifiers.
+
+- `path_hash_mode` values are `0` = 1-byte, `1` = 2-byte, `2` = 3-byte.
+- `GET /api/radio/config` exposes both the current `path_hash_mode` and `path_hash_mode_supported`.
+- `PATCH /api/radio/config` may update `path_hash_mode` only when the connected firmware supports it.
+- Contacts persist `out_path_hash_mode` separately from `last_path` so contact sync and DM send paths can round-trip correctly even when hop bytes are ambiguous.
+- `path_len` in API payloads is always hop count, not byte count. The actual path byte length is `hop_count * hash_size`.
+
+## Data Flow
+
+### Incoming Messages
+
+1. Radio receives raw bytes → `packet_processor.py` parses, decrypts, deduplicates, and stores in database (primary path via `RX_LOG_DATA` event)
+2. `event_handlers.py` handles higher-level events (`CONTACT_MSG_RECV`, `ACK`) as a fallback/supplement
+3. `broadcast_event()` in `websocket.py` fans out to both WebSocket clients and MQTT
+4. Frontend `useWebSocket` receives → updates React state
+
+### Outgoing Messages
+
+1. User types message → clicks send
+2. `api.sendChannelMessage()` → POST to backend
+3. Backend calls `radio_manager.meshcore.commands.send_chan_msg()`
+4. Message stored in database with `outgoing=true`
+5. For direct messages: ACK tracked; for channel: repeat detection
+
+### ACK and Repeat Detection
+
+**Direct messages**: Expected ACK code is tracked. When ACK event arrives, message marked as acked.
+
+**Channel messages**: Flood messages echo back through repeaters. Repeats are identified by the database UNIQUE constraint on `(type, conversation_key, text, sender_timestamp)` — when an INSERT hits a duplicate, `_handle_duplicate_message()` in `packet_processor.py` adds the new path and, for outgoing messages only, increments the ack count. Incoming repeats add path data but do not change the ack count. There is no timestamp-windowed matching; deduplication is exact-match only.
+
+This message-layer echo/path handling is independent of raw-packet storage deduplication.
+
+## Directory Structure
+
+```
+.
+├── app/                    # FastAPI backend
+│   ├── AGENTS.md           # Backend documentation
+│   ├── main.py             # App entry, lifespan
+│   ├── routers/            # API endpoints
+│   ├── packet_processor.py # Raw packet pipeline, dedup, path handling
+│   ├── repository/         # Database CRUD (contacts, channels, messages, raw_packets, settings, fanout)
+│   ├── event_handlers.py   # Radio events
+│   ├── decoder.py          # Packet decryption
+│   ├── websocket.py        # Real-time broadcasts
+│   └── fanout/             # Fanout bus: MQTT, bots, webhooks, Apprise (see fanout/AGENTS_fanout.md)
+├── frontend/               # React frontend
+│   ├── AGENTS.md           # Frontend documentation
+│   ├── src/
+│   │   ├── App.tsx         # Main component
+│   │   ├── api.ts          # REST client
+│   │   ├── useWebSocket.ts # WebSocket hook
+│   │   └── components/
+│   │       ├── CrackerPanel.tsx  # WebGPU key cracking
+│   │       ├── MapView.tsx       # Leaflet map showing node locations
+│   │       └── ...
+│   └── vite.config.ts
+├── scripts/
+│   ├── all_quality.sh      # Run all lint, format, typecheck, tests, build (sequential)
+│   ├── collect_licenses.sh # Gather third-party license attributions
+│   ├── e2e.sh              # End-to-end test runner
+│   └── publish.sh          # Version bump, changelog, docker build & push
+├── remoteterm.service      # Systemd unit file for production deployment
+├── tests/                  # Backend tests (pytest)
+├── data/                   # SQLite database (runtime)
+└── pyproject.toml          # Python dependencies
+```
+
+## Development Setup
+
+### Backend
+
+```bash
+# Install dependencies
+uv sync
+
+# Run server (auto-detects radio)
+uv run uvicorn app.main:app --reload
+
+# Or specify port
+MESHCORE_SERIAL_PORT=/dev/cu.usbserial-0001 uv run uvicorn app.main:app --reload
+```
+
+### Frontend
+
+```bash
+cd frontend
+npm install
+npm run dev    # http://localhost:5173, proxies /api to :8000
+```
+
+### Both Together (Development)
+
+Terminal 1: `uv run uvicorn app.main:app --reload`
+Terminal 2: `cd frontend && npm run dev`
+
+### Production
+
+In production, the FastAPI backend serves the compiled frontend. Build the frontend first:
+
+```bash
+cd frontend && npm install && npm run build && cd ..
+uv run uvicorn app.main:app --host 0.0.0.0 --port 8000
+```
+
+Access at `http://localhost:8000`. All API routes are prefixed with `/api`.
+
+If `frontend/dist` (or `frontend/dist/index.html`) is missing, backend startup now logs an explicit error and continues serving API routes. In that case, frontend static routes are not mounted until a frontend build is present.
+
+## Testing
+
+### Backend (pytest)
+
+```bash
+PYTHONPATH=. uv run pytest tests/ -v
+```
+
+Key test files:
+- `tests/test_decoder.py` - Channel + direct message decryption, key exchange
+- `tests/test_keystore.py` - Ephemeral key store
+- `tests/test_event_handlers.py` - ACK tracking, repeat detection
+- `tests/test_packet_pipeline.py` - End-to-end packet processing
+- `tests/test_api.py` - API endpoints, read state tracking
+- `tests/test_migrations.py` - Database migration system
+- `tests/test_frontend_static.py` - Frontend static route registration (missing `dist`/`index.html` handling)
+- `tests/test_messages_search.py` - Message search, around endpoint, forward pagination
+- `tests/test_rx_log_data.py` - on_rx_log_data event handler integration
+- `tests/test_ack_tracking_wiring.py` - DM ACK tracking extraction and wiring
+- `tests/test_health_mqtt_status.py` - Health endpoint MQTT status field
+- `tests/test_community_mqtt.py` - Community MQTT publisher (JWT, packet format, hash, broadcast)
+- `tests/test_radio_sync.py` - Radio sync, periodic tasks, and contact offload back to the radio
+- `tests/test_real_crypto.py` - Real cryptographic operations
+- `tests/test_disable_bots.py` - MESHCORE_DISABLE_BOTS=true feature
+
+### Frontend (Vitest)
+
+```bash
+cd frontend
+npm run test:run
+```
+
+### Before Completing Changes
+
+**Always run `./scripts/all_quality.sh` before finishing any changes that have modified code or tests.** This runs all linting, formatting, type checking, tests, and builds sequentially, catching type mismatches, breaking changes, and compilation errors. This is not necessary for docs-only changes.
+
+## API Summary
+
+All endpoints are prefixed with `/api` (e.g., `/api/health`).
+
+| Method | Endpoint | Description |
+|--------|----------|-------------|
+| GET | `/api/health` | Connection status, fanout statuses, bots_disabled flag |
+| GET | `/api/radio/config` | Radio configuration, including `path_hash_mode` and `path_hash_mode_supported` |
+| PATCH | `/api/radio/config` | Update name, location, radio params, and `path_hash_mode` when supported |
+| PUT | `/api/radio/private-key` | Import private key to radio |
+| POST | `/api/radio/advertise` | Send advertisement |
+| POST | `/api/radio/reboot` | Reboot radio or reconnect if disconnected |
+| POST | `/api/radio/reconnect` | Manual radio reconnection |
+| GET | `/api/contacts` | List contacts |
+| GET | `/api/contacts/repeaters/advert-paths` | List recent unique advert paths for all contacts |
+| GET | `/api/contacts/{public_key}` | Get contact by public key or prefix |
+| GET | `/api/contacts/{public_key}/detail` | Comprehensive contact profile (stats, name history, paths) |
+| GET | `/api/contacts/{public_key}/advert-paths` | List recent unique advert paths for a contact |
+| POST | `/api/contacts` | Create contact (optionally trigger historical DM decrypt) |
+| DELETE | `/api/contacts/{public_key}` | Delete contact |
+| POST | `/api/contacts/sync` | Pull from radio |
+| POST | `/api/contacts/{public_key}/add-to-radio` | Push contact to radio |
+| POST | `/api/contacts/{public_key}/remove-from-radio` | Remove contact from radio |
+| POST | `/api/contacts/{public_key}/mark-read` | Mark contact conversation as read |
+| POST | `/api/contacts/{public_key}/command` | Send CLI command to repeater |
+| POST | `/api/contacts/{public_key}/reset-path` | Reset contact path to flood |
+| POST | `/api/contacts/{public_key}/trace` | Trace route to contact |
+| POST | `/api/contacts/{public_key}/repeater/login` | Log in to a repeater |
+| POST | `/api/contacts/{public_key}/repeater/status` | Fetch repeater status telemetry |
+| POST | `/api/contacts/{public_key}/repeater/lpp-telemetry` | Fetch CayenneLPP sensor data |
+| POST | `/api/contacts/{public_key}/repeater/neighbors` | Fetch repeater neighbors |
+| POST | `/api/contacts/{public_key}/repeater/acl` | Fetch repeater ACL |
+| POST | `/api/contacts/{public_key}/repeater/radio-settings` | Fetch radio settings via CLI |
+| POST | `/api/contacts/{public_key}/repeater/advert-intervals` | Fetch advert intervals |
+| POST | `/api/contacts/{public_key}/repeater/owner-info` | Fetch owner info |
+
+| GET | `/api/channels` | List channels |
+| GET | `/api/channels/{key}/detail` | Comprehensive channel profile (message stats, top senders) |
+| GET | `/api/channels/{key}` | Get channel by key |
+| POST | `/api/channels` | Create channel |
+| DELETE | `/api/channels/{key}` | Delete channel |
+| POST | `/api/channels/sync` | Pull from radio |
+| POST | `/api/channels/{key}/mark-read` | Mark channel as read |
+| GET | `/api/messages` | List with filters (`q`, `after`/`after_id` for forward pagination) |
+| GET | `/api/messages/around/{id}` | Get messages around a specific message (for jump-to-message) |
+| POST | `/api/messages/direct` | Send direct message |
+| POST | `/api/messages/channel` | Send channel message |
+| POST | `/api/messages/channel/{message_id}/resend` | Resend channel message (default: byte-perfect within 30s; `?new_timestamp=true`: fresh timestamp, no time limit, creates new message row) |
+| GET | `/api/packets/undecrypted/count` | Count of undecrypted packets |
+| POST | `/api/packets/decrypt/historical` | Decrypt stored packets |
+| POST | `/api/packets/maintenance` | Delete old packets and vacuum |
+| GET | `/api/read-state/unreads` | Server-computed unread counts, mentions, last message times |
+| POST | `/api/read-state/mark-all-read` | Mark all conversations as read |
+| GET | `/api/settings` | Get app settings |
+| PATCH | `/api/settings` | Update app settings |
+| POST | `/api/settings/favorites/toggle` | Toggle favorite status |
+| POST | `/api/settings/blocked-keys/toggle` | Toggle blocked key |
+| POST | `/api/settings/blocked-names/toggle` | Toggle blocked name |
+| POST | `/api/settings/migrate` | One-time migration from frontend localStorage |
+| GET | `/api/fanout` | List all fanout configs |
+| POST | `/api/fanout` | Create new fanout config |
+| PATCH | `/api/fanout/{id}` | Update fanout config (triggers module reload) |
+| DELETE | `/api/fanout/{id}` | Delete fanout config (stops module) |
+| GET | `/api/statistics` | Aggregated mesh network statistics |
+| WS | `/api/ws` | Real-time updates |
+
+## Key Concepts
+
+### Contact Public Keys
+
+- Full key: 64-character hex string
+- Prefix: 12-character hex (used for matching)
+- Lookups use `LIKE 'prefix%'` for matching
+
+### Contact Types
+
+- `0` - Unknown
+- `1` - Client (regular node)
+- `2` - Repeater
+- `3` - Room
+- `4` - Sensor
+
+### Channel Keys
+
+- Stored as 32-character hex string (TEXT PRIMARY KEY)
+- Hashtag channels: `SHA256("#name")[:16]` converted to hex
+- Custom channels: User-provided or generated
+
+### Message Types
+
+- `PRIV` - Direct messages
+- `CHAN` - Channel messages
+- Both use `conversation_key` (user pubkey for PRIV, channel key for CHAN)
+
+### Read State Tracking
+
+Read state (`last_read_at`) is tracked **server-side** for consistency across devices:
+- Stored as Unix timestamp in `contacts.last_read_at` and `channels.last_read_at`
+- Updated via `POST /api/contacts/{public_key}/mark-read` and `POST /api/channels/{key}/mark-read`
+- Bulk update via `POST /api/read-state/mark-all-read`
+- Aggregated counts via `GET /api/read-state/unreads` (server-side computation)
+
+**State Tracking Keys (Frontend)**: Generated by `getStateKey()` for message times (sidebar sorting):
+- Channels: `channel-{channel_key}`
+- Contacts: `contact-{full-public-key}`
+
+**Note:** These are NOT the same as `Message.conversation_key` (the database field).
+
+### Fanout Bus (MQTT, Bots, Webhooks, Apprise)
+
+All external integrations are managed through the fanout bus (`app/fanout/`). Each integration is a `FanoutModule` with scope-based event filtering, stored in the `fanout_configs` table and managed via `GET/POST/PATCH/DELETE /api/fanout`.
+
+`broadcast_event()` in `websocket.py` dispatches `message` and `raw_packet` events to the fanout manager. See `app/fanout/AGENTS_fanout.md` for full architecture details.
+
+Community MQTT forwards raw packets only. Its derived `path` field, when present on direct packets, is a comma-separated list of hop identifiers as reported by the packet format. Token width therefore varies with the packet's path hash mode; it is intentionally not a flat per-byte rendering.
+
+### Server-Side Decryption
+
+The server can decrypt packets using stored keys, both in real-time and for historical packets.
+
+**Channel messages**: Decrypted automatically when a matching channel key is available.
+
+**Direct messages**: Decrypted server-side using the private key exported from the radio on startup. This enables DM decryption even when the contact isn't loaded on the radio. The private key is stored in memory only (see `keystore.py`).
+
+## MeshCore Library
+
+The `meshcore_py` library provides radio communication. Key patterns:
+
+```python
+# Connection
+mc = await MeshCore.create_serial(port="/dev/ttyUSB0")
+
+# Commands
+await mc.commands.send_msg(dst, msg)
+await mc.commands.send_chan_msg(channel_idx, msg)
+await mc.commands.get_contacts()
+await mc.commands.set_channel(idx, name, key)
+
+# Events
+mc.subscribe(EventType.CONTACT_MSG_RECV, handler)
+mc.subscribe(EventType.CHANNEL_MSG_RECV, handler)
+mc.subscribe(EventType.ACK, handler)
+```
+
+## Environment Variables
+
+| Variable | Default | Description |
+|----------|---------|-------------|
+| `MESHCORE_SERIAL_PORT` | auto-detect | Serial port for radio |
+| `MESHCORE_TCP_HOST` | *(none)* | TCP host for radio (mutually exclusive with serial/BLE) |
+| `MESHCORE_TCP_PORT` | `4000` | TCP port (used with `MESHCORE_TCP_HOST`) |
+| `MESHCORE_BLE_ADDRESS` | *(none)* | BLE device address (mutually exclusive with serial/TCP) |
+| `MESHCORE_BLE_PIN` | *(required with BLE)* | BLE PIN code |
+| `MESHCORE_SERIAL_BAUDRATE` | `115200` | Serial baud rate |
+| `MESHCORE_LOG_LEVEL` | `INFO` | Logging level (`DEBUG`/`INFO`/`WARNING`/`ERROR`) |
+| `MESHCORE_DATABASE_PATH` | `data/meshcore.db` | SQLite database location |
+| `MESHCORE_DISABLE_BOTS` | `false` | Disable bot system entirely (blocks execution and config) |
+
+**Note:** Runtime app settings are stored in the database (`app_settings` table), not environment variables. These include `max_radio_contacts`, `auto_decrypt_dm_on_advert`, `sidebar_sort_order`, `advert_interval`, `last_advert_time`, `favorites`, `last_message_times`, `flood_scope`, `blocked_keys`, and `blocked_names`. They are configured via `GET/PATCH /api/settings`. MQTT, bot, webhook, and Apprise configs are stored in the `fanout_configs` table, managed via `/api/fanout`.
+
+Byte-perfect channel retries are user-triggered via `POST /api/messages/channel/{message_id}/resend` and are allowed for 30 seconds after the original send.
+
+**Transport mutual exclusivity:** Only one of `MESHCORE_SERIAL_PORT`, `MESHCORE_TCP_HOST`, or `MESHCORE_BLE_ADDRESS` may be set. If none are set, serial auto-detection is used.
+
+## Errata & Known Non-Issues
+
+### `meshcore_py` advert parsing can crash on malformed/truncated RF log packets
+
+The vendored MeshCore Python reader's `LOG_DATA` advert path assumes the decoded advert payload always contains at least 101 bytes of advert body and reads the flags byte with `pk_buf.read(1)[0]` without a length guard. If a malformed or truncated RF log frame slips through, `MessageReader.handle_rx()` can fail with `IndexError: index out of range` from `meshcore/reader.py` while parsing payload type `0x04` (advert).
+
+This does not indicate database corruption or a message-store bug. It is a parser-hardening gap in `meshcore_py`: the reader does not fully mirror firmware-side packet/path validation before attempting advert decode. The practical effect is usually a one-off asyncio task failure for that packet while later packets continue processing normally.

CHANGELOG.md

@@ -1,3 +1,260 @@
+## [2.7.8] - 2026-03-08
+
+
+
+## [2.7.8] - 2026-03-08
+
+Bugfix: Improve frontend asset resolution and fixup the build/push script
+
+## [2.7.1] - 2026-03-08
+
+Bugfix: Fix historical DM packet length passing
+Misc: Follow better inclusion patterns for the patched meshcore-decoder and just publish the dang package
+Misc: Patch a bewildering browser quirk that cause large raw packet lists to extend past the bottom of the page
+
+## [2.7.0] - 2026-03-08
+
+Feature: Multibyte path support
+Feature: Add multibyte statistics to statistics pane
+Feature: Add path bittage to contact info pane
+Feature: Put tools in a collapsible
+
+## [2.6.1] - 2026-03-08
+
+Misc: Fix busted docker builds; we don't have a 2.6.0 build sorry
+
+## [2.6.0] - 2026-03-08
+
+Feature: A11y improvements
+Feature: New themes
+Feature: Backfill channel sender identity when available
+Feature: Modular fanout bus, including Webhooks, more customizable community MQTT, and Apprise
+Bugfix: Unreads now respect blocklist
+Bugfix: Unreads can't accumulate on an open thread
+Bugfix: Channel name in broadcasts
+Bugfix: Add missing httpx dependency
+Bugfix: Improvements to radio startup frontend-blocking time and radio status reporting
+Misc: Improved button signage for app movement
+Misc: Test, performance, and documentation improvements
+
+## [2.5.0] - 2026-03-05
+
+Feature: Far better accessibility across the app (with far to go)
+Feature: Add community MQTT stats reporting, and improve over a few commits
+Feature: Color schemes and misc. settings reorg
+Feature: Add why-active to filtered nodes
+Feature: Add channel and contact info box
+Feature: Add contact blocking
+Feature: Add potential repeater path map display
+Feature: Add flood scoping/regions
+Feature: Global message search
+Feature: Fully safe bot disable
+Feature: Add default #remoteterm channel (lol sorry I had to)
+Feature: Custom recency pruning in visualizer
+Bugfix: Be more cautious around null byte stripping
+Bugfix: Clear channel-add interface on not-add-another
+Bugfix: Add status/name/MQTT LWT
+Bugfix: Channel deletion propagates over WS
+Bugfix: Show map location for all nodes on link, not 7-day-limited
+Bugfix: Hide private key channel keys by default
+Misc: Logline to show if cleanup loop on non-sync'd meshcore radio links fixes anything
+Misc: Doc, changelog, and test improvements
+Misc: Add, and remove, package lock (sorry Windows users)
+Misc: Don't show mark all as read if not necessary
+Misc: Fix stale closures and misc. frontend perf/correctness improvements
+Misc: Add Windows startup notes
+Misc: E2E expansion + improvement
+Misc: Move around visualizer settings
+
+## [2.4.0] - 2026-03-02
+
+Feature: Add community MQTT reporting (e.g. LetsMesh.net)
+Misc: Build scripts and library attribution
+Misc: Add sign of life to E2E tests
+
+## [2.3.0] - 2026-03-01
+
+Feature: Click path description to reset to flood
+Feature: Add MQTT publishing
+Feature: Visualizer remembers settings
+Bugfix: Fix prefetch usage
+Bugfix: Fixed an issue where busy channels can result in double-display of incoming messages
+Misc: Drop py3.12 requirement
+Misc: Performance, documentation, test, and file structure optimizations
+Misc: Add arrows between route nodes on contact info
+Misc: Show repeater path/type in title bar
+
+## [2.2.0] - 2026-02-28
+
+Feature: Track advert paths and use to disambiguate repeater identity in visualizer
+Feature: Contact info pane
+Feature: Overhaul repeater interface
+Bugfix: Misc. frontend rendering + perf improvements
+Bugfix: Better behavior around radio locking and autofetch/polling
+Bugfix: Clear channel name field on new-channel modal tab change
+Bugfix: Repeater inforbox can scroll
+Bugfix: Better handling of historical DM encrypts
+Bugfix: Handle errors if returned in prefetch phase
+Misc: Radio event response failure is logged/surfaced better
+Misc: Improve test coverage and remove dead code
+Misc: Documentation and errata improvements
+Misc: Database storage optimization
+
+## [2.1.0] - 2026-02-23
+
+Feature: Add ability to remember last-used channel on load
+Feature: Add `docker compose` support (thanks @suymur !)
+Feature: Better-aligned favicon (lol)
+Bugfix: Disable autocomplete on message field
+Bugfix: Legacy hash restoration on page load
+Bugfix: Align resend buttons in pathing modal
+Bugfix: Update README.md (briefly), then docker-compose.yaml, to reflect correct docker image host
+Bugfix: Correct settings pane scroll lock on zoom (thanks @yellowcooln !)
+Bugfix: Improved repeater comms on busy meshes
+Bugfix: Drain before autofetch from radio
+Bugfix: Fix, or document exceptions to, sub-second resolution message failure
+Bugfix: Improved handling of radio connection, disconnection, and connection-aliveness-status
+Bugfix: Force server-side keystore update when radio key changes
+Bugfix: Reduce WS churn for incoming message handling
+Bugfix: Fix content type signalling for irrelevant endpoints
+Bugfix: Handle stuck post-connect failure state
+Misc: Documentation & version parsing improvements
+Misc: Hide char counter on mobile for short messages
+Misc: Typo fixes in docs and settings
+Misc: Add dynamic webmanifest for hosts that can support it
+Misc: Improve DB size via dropping unnecessary uniqs, indices, vacuum, and offering ability to drop historical matches packets
+Misc: Drop weird rounded bounding box for settings
+Misc: Move resend buttons to pathing modal
+Misc: Improved comments around database ownership on *nix systems
+Misc: Move to SSoT for message dedupe on frontend
+Misc: Move DM ack clearing to standard poll, and increase hold time between polling
+Misc: Holistic testing overhaul
+
+## [2.0.1] - 2026-02-16
+
+Bugfix: Fix missing trigger condition on statistics pane expansion on mobile
+
+## [2.0.0] - 2026-02-16
+
+Feature: Frontend UX + log overhaul
+Bugfix: Use contact object from DB for broadcast rather than handrolling
+Bugfix: Fix out of order path WS messages overwriting each other
+Bugfix: Make broadcast timestamp match fallback logic used in storage code
+Bugfix: Fix repeater command timestamp selection logic
+Bugfix: Use actual pubkey matching for path update, and don't action serial path update events (use RX packet)
+Bugfix: Add missing radio operation locks in a few spots
+Bugfix: Fix dedupe for frontend raw packet delivery (mesh visualizer much more active now!)
+Bugfix: Less aggressive dedupe for advert packets (we don't care about the payload, we care about the path, duh)
+Misc: Visualizer layout refinement & option labels
+
+## [1.10.0] - 2026-02-16
+
+Feature: Collapsible sidebar sections with per-section unread badge (thanks @rgregg !)
+Feature: 3D mesh visualizer
+Feature: Statistics pane
+Feature: Support incoming/outgoing indication for bot invocations
+Feature: Quick byte-perfect message resend if you got unlucky with repeats (thanks @rgregg -- we had a parallel implementation but I appreciate your work!)
+Bugfix: Fix top padding out outgoing message
+Bugfix: Frontend performance, appearance, and Lighthouse improvements (prefetches, form labelling, contrast, channel/roomlist changes)
+Bugfix: Multiple-sent messages had path appearing delays until rerender
+Bugfix: Fix ack/message race condition that caused dropped ack displays until rerender
+Misc: Dedupe contacts/rooms by key and not name to prevent name collisions creating unreachable conversations
+Misc: s/stopped/idle/ for room finder
+
+## [1.9.3] - 2026-02-12
+
+Feature: Upgrade the room finder to support two-word rooms
+
+## [1.9.2] - 2026-02-12
+
+Feature: Options dialog sucks less
+Bugfix: Move tests to isolated memory DB
+Bugfix: Mention case sensitivity
+Bugfix: Stale header retention on settings page view
+Bugfix: Non-isolated path writing
+Bugfix: Nullable contact fields are now passed as real nulls
+Bugfix: Look at all fields on message reconcile, not just text
+Bugfix: Make mark-all-as-read atomic
+Misc: Purge unused WS handlers from back when we did chans and contacts over WS, not API
+Misc: Massive test and AGENTS.md overhauls and additions
+
+## [1.9.1] - 2026-02-10
+
+Feature: Contacts and channels use keys, not names
+Bugfix: Fix falsy casting of 0 in lat lon and timing data
+Bugfix: Show message length in bytes, not chars
+Bugfix: Fix phantom unread badges on focused convos
+Misc: Bot invocation to async
+Misc: Use full key, not prefix, where we can
+
+## [1.9.0] - 2026-02-10
+
+Feature: Favorited contacts are preferentially loaded onto the radio
+Feature: Add recent-message caching for fast switching
+Feature: Add echo paths modal when echo-heard checkbox is clicked
+Feature: Add experimental byte-perfect double-send for bad RF environments to try to punch the message out
+Frontend: Better styling on echo + message path display
+Bugfix: Prevent frontend static file serving path traversal vuln
+Bugfix: Safer prefix-claiming for DMs we don't have the key for
+Bugfix: Prevent injection from mentions with special characters
+Bugfix: Fix repeaters comms showing in wrong channel when repeater operations are in flight and the channel is changed quickly
+Bugfix: App can boot and test without a frontend dir
+Misc: Improve and consistent-ify (?) backend radio operation lock management
+Misc: Frontend performance and safety enhancements
+Misc: Move builds to non-bundled; usage requires building the Frontend
+Misc: Update tests and agent docs
+
+## [1.8.0] - 2026-02-07
+
+Feature: Single hop ping
+Feature: PWA viewport fixes(thanks @rgregg)
+Feature (?): No frontend distribution; build it yourself ;P
+Bugfix: Fix channel message send race condition (concurrent sends could corrupt shared radio slot)
+Bugfix: Fix TOCTOU race in radio reconnect (duplicate connections under contention)
+Bugfix: Better guarding around reconnection
+Bugfix: Duplicate websocket connection fixes
+Bugfix: Settings tab error cleanliness on tab swap
+Bugfix: Fix path traversal vuln
+UI: Swap visualizer legend ordering (yay prettier)
+Misc: Perf and locking improvements
+Misc: Always flood advertisements
+Misc: Better packet dupe handling
+Misc: Dead code cleanup, test improvements
+
+## [1.7.1] - 2026-02-03
+
+Feature: Clickable hyperlinks
+Bugfix: More consistent public key normalization
+Bugfix: Use more reliable cursor paging
+Bugfix: Fix null timestamp dedupe failure
+Bugfix: More consistent prefix-based message claiming on key receipt
+Misc: Bot can respond to its own messages
+Misc: Additional tests
+Misc: Remove unneeded message dedupe logic
+Misc: Resync settings after radio settings mutation
+
+## [1.7.0] - 2026-01-27
+
+Feature: Multi-bot functionality
+Bugfix: Adjust bot code editor display and add line numbers
+Bugfix: Fix clock filtering and contact lookup behavior bugs
+Bugfix: Fix repeater message duplication issue
+Bugfix: Correct outbound message timestamp assignment (affecting outgoing messages seen as incoming)
+UI: Move advertise button to identity tab
+Misc: Clarify fallback functionality for missing private key export in logs
+
+## [1.6.0] - 2026-01-26
+
+Feature: Visualizer: extract public key from AnonReq, add heuristic repeater disambiguation, add reset button, draggable nodes
+Feature: Customizable advertising interval
+Feature: In-app bot setup
+Bugfix: Force contact onto radio before DM send
+Misc: Remove unused code
+
+## [1.5.0] - 2026-01-19
+
+Feature: Network visualizer
+
 ## [1.4.1] - 2026-01-19
 
 Feature: Add option to attempt historical DM decrypt on new-contact advertisement (disabled by default)

CLAUDE.md

@@ -1,315 +1,5 @@
-# RemoteTerm for MeshCore
-
-## Important Rules
-
-**NEVER make git commits.** A human must make all commits. You may stage files and prepare commit messages, but do not run `git commit`.
-
-If instructed to "run all tests" or "get ready for a commit" or other summative, work ending directives, make sure you run the following and that they all pass green:
-
-```bash
-uv run ruff check app/ tests/ --fix # check for python violations
-uv run ruff format app/ tests/ # format python
-uv run pyright app/ # type check python
-PYTHONPATH=. uv run pytest tests/ -v # test python
-
-cd frontend/ # move to frontend directory
-npm run lint:fix # fix lint violations
-npm run format # format the code
-npm run build # run a frontend build
-```
-
-## Overview
-
-A web interface for MeshCore mesh radio networks. The backend connects to a MeshCore-compatible radio over serial and exposes REST/WebSocket APIs. The React frontend provides real-time messaging and radio configuration.
-
 **For detailed component documentation, see:**
-- `app/CLAUDE.md` - Backend (FastAPI, database, radio connection, packet decryption)
-- `frontend/CLAUDE.md` - Frontend (React, state management, WebSocket, components)
 
-## Architecture Overview
-
-```
-┌─────────────────────────────────────────────────────────────────┐
-│                         Frontend (React)                         │
-│  ┌──────────┐  ┌──────────┐  ┌──────────┐  ┌──────────────────┐ │
-│  │ StatusBar│  │ Sidebar  │  │MessageList│  │  MessageInput   │ │
-│  └──────────┘  └──────────┘  └──────────┘  └──────────────────┘ │
-│  ┌────────────────────────────────────────────────────────────┐ │
-│  │      CrackerPanel (global collapsible, WebGPU cracking)    │ │
-│  └────────────────────────────────────────────────────────────┘ │
-│                           │                                      │
-│                    useWebSocket ←──── Real-time updates          │
-│                           │                                      │
-│                      api.ts ←──── REST API calls                 │
-└───────────────────────────┼──────────────────────────────────────┘
-                            │ HTTP + WebSocket (/api/*)
-┌───────────────────────────┼──────────────────────────────────────┐
-│                      Backend (FastAPI)                           │
-│  ┌──────────┐  ┌──────────────┐  ┌────────────┐  ┌───────────┐  │
-│  │ Routers  │→ │ Repositories │→ │  SQLite DB │  │ WebSocket │  │
-│  └──────────┘  └──────────────┘  └────────────┘  │  Manager  │  │
-│        ↓                                          └───────────┘  │
-│  ┌──────────────────────────────────────────────────────────┐   │
-│  │              RadioManager + Event Handlers               │   │
-│  └──────────────────────────────────────────────────────────┘   │
-└───────────────────────────┼──────────────────────────────────────┘
-                            │ Serial
-                     ┌──────┴──────┐
-                     │ MeshCore    │
-                     │   Radio     │
-                     └─────────────┘
-```
-
-## Key Design Principles
-
-1. **Store-and-serve**: Backend stores all packets even when no client is connected
-2. **Parallel storage**: Messages stored both decrypted (when possible) and as raw packets
-3. **Extended capacity**: Server stores contacts/channels beyond radio limits (~350 contacts, ~40 channels)
-4. **Real-time updates**: WebSocket pushes events; REST for actions
-5. **Offline-capable**: Radio operates independently; server syncs when connected
-6. **Auto-reconnect**: Background monitor detects disconnection and attempts reconnection
-
-## Data Flow
-
-### Incoming Messages
-
-1. Radio receives message → MeshCore library emits event
-2. `event_handlers.py` catches event → stores in database
-3. `ws_manager` broadcasts to connected clients
-4. Frontend `useWebSocket` receives → updates React state
-
-### Outgoing Messages
-
-1. User types message → clicks send
-2. `api.sendChannelMessage()` → POST to backend
-3. Backend calls `radio_manager.meshcore.commands.send_chan_msg()`
-4. Message stored in database with `outgoing=true`
-5. For direct messages: ACK tracked; for channel: repeat detection
-
-### ACK and Repeat Detection
-
-**Direct messages**: Expected ACK code is tracked. When ACK event arrives, message marked as acked.
-
-**Channel messages**: Flood messages echo back. The decoder identifies repeats by matching (channel_idx, text_hash, timestamp ±5s) and marks the original as "acked".
-
-## Directory Structure
-
-```
-.
-├── app/                    # FastAPI backend
-│   ├── CLAUDE.md           # Backend documentation
-│   ├── main.py             # App entry, lifespan
-│   ├── routers/            # API endpoints
-│   ├── repository.py       # Database CRUD
-│   ├── event_handlers.py   # Radio events
-│   ├── decoder.py          # Packet decryption
-│   └── websocket.py        # Real-time broadcasts
-├── frontend/               # React frontend
-│   ├── CLAUDE.md           # Frontend documentation
-│   ├── src/
-│   │   ├── App.tsx         # Main component
-│   │   ├── api.ts          # REST client
-│   │   ├── useWebSocket.ts # WebSocket hook
-│   │   └── components/
-│   │       ├── CrackerPanel.tsx  # WebGPU key cracking
-│   │       ├── MapView.tsx       # Leaflet map showing node locations
-│   │       └── ...
-│   └── vite.config.ts
-├── references/meshcore_py/ # MeshCore Python library
-├── tests/                  # Backend tests (pytest)
-├── data/                   # SQLite database (runtime)
-├── integration_test.html   # Browser-based API tests
-└── pyproject.toml          # Python dependencies
-```
-
-## Development Setup
-
-### Backend
-
-```bash
-# Install dependencies
-uv sync
-
-# Run server (auto-detects radio)
-uv run uvicorn app.main:app --reload
-
-# Or specify port
-MESHCORE_SERIAL_PORT=/dev/cu.usbserial-0001 uv run uvicorn app.main:app --reload
-```
-
-### Frontend
-
-```bash
-cd frontend
-npm install
-npm run dev    # http://localhost:5173, proxies /api to :8000
-```
-
-### Both Together (Development)
-
-Terminal 1: `uv run uvicorn app.main:app --reload`
-Terminal 2: `cd frontend && npm run dev`
-
-### Production
-
-In production, the FastAPI backend serves the compiled frontend:
-
-```bash
-cd frontend && npm run build && cd ..
-uv run uvicorn app.main:app --host 0.0.0.0 --port 8000
-```
-
-Access at `http://localhost:8000`. All API routes are prefixed with `/api`.
-
-## Testing
-
-### Backend (pytest)
-
-```bash
-PYTHONPATH=. uv run pytest tests/ -v
-```
-
-Key test files:
-- `tests/test_decoder.py` - Channel + direct message decryption, key exchange
-- `tests/test_keystore.py` - Ephemeral key store
-- `tests/test_event_handlers.py` - ACK tracking, repeat detection
-- `tests/test_api.py` - API endpoints, read state tracking
-- `tests/test_migrations.py` - Database migration system
-
-### Frontend (Vitest)
-
-```bash
-cd frontend
-npm run test:run
-```
-
-### Integration Tests
-
-Open `integration_test.html` in a browser with the backend running.
-
-### Before Completing Changes
-
-**Always run both backend and frontend validation before finishing any changes:**
-
-```bash
-# From project root - run backend tests
-PYTHONPATH=. uv run pytest tests/ -v
-
-# From project root - run frontend tests and build
-cd frontend && npm run test:run && npm run build
-```
-
-This catches:
-- Type mismatches between frontend and backend (e.g., missing fields in TypeScript interfaces)
-- Breaking changes to shared types or API contracts
-- Runtime errors that only surface during compilation
-
-## API Summary
-
-All endpoints are prefixed with `/api` (e.g., `/api/health`).
-
-| Method | Endpoint | Description |
-|--------|----------|-------------|
-| GET | `/api/health` | Connection status |
-| GET | `/api/radio/config` | Radio configuration |
-| PATCH | `/api/radio/config` | Update name, location, radio params |
-| POST | `/api/radio/advertise` | Send advertisement |
-| POST | `/api/radio/reconnect` | Manual radio reconnection |
-| POST | `/api/radio/reboot` | Reboot radio or reconnect if disconnected |
-| PUT | `/api/radio/private-key` | Import private key to radio |
-| GET | `/api/contacts` | List contacts |
-| POST | `/api/contacts` | Create contact (optionally trigger historical DM decrypt) |
-| POST | `/api/contacts/sync` | Pull from radio |
-| POST | `/api/contacts/{key}/telemetry` | Request telemetry from repeater |
-| POST | `/api/contacts/{key}/command` | Send CLI command to repeater |
-| GET | `/api/channels` | List channels |
-| POST | `/api/channels` | Create channel |
-| GET | `/api/messages` | List with filters |
-| POST | `/api/messages/direct` | Send direct message |
-| POST | `/api/messages/channel` | Send channel message |
-| POST | `/api/packets/decrypt/historical` | Decrypt stored packets |
-| GET | `/api/packets/decrypt/progress` | Get historical decryption progress |
-| POST | `/api/packets/maintenance` | Delete old packets (cleanup) |
-| POST | `/api/contacts/{key}/mark-read` | Mark contact conversation as read |
-| POST | `/api/channels/{key}/mark-read` | Mark channel as read |
-| POST | `/api/read-state/mark-all-read` | Mark all conversations as read |
-| GET | `/api/settings` | Get app settings |
-| PATCH | `/api/settings` | Update app settings |
-| WS | `/api/ws` | Real-time updates |
-
-## Key Concepts
-
-### Contact Public Keys
-
-- Full key: 64-character hex string
-- Prefix: 12-character hex (used for matching)
-- Lookups use `LIKE 'prefix%'` for matching
-
-### Contact Types
-
-- `0` - Unknown
-- `1` - Client (regular node)
-- `2` - Repeater
-- `3` - Room
-
-### Channel Keys
-
-- Stored as 32-character hex string (TEXT PRIMARY KEY)
-- Hashtag channels: `SHA256("#name")[:16]` converted to hex
-- Custom channels: User-provided or generated
-
-### Message Types
-
-- `PRIV` - Direct messages
-- `CHAN` - Channel messages
-- Both use `conversation_key` (user pubkey for PRIV, channel key for CHAN)
-
-### Read State Tracking
-
-Read state (`last_read_at`) is tracked **server-side** for consistency across devices:
-- Stored as Unix timestamp in `contacts.last_read_at` and `channels.last_read_at`
-- Updated via `POST /api/contacts/{key}/mark-read` and `POST /api/channels/{key}/mark-read`
-- Bulk update via `POST /api/read-state/mark-all-read`
-- Frontend compares `last_read_at` with message `received_at` to count unreads
-
-**State Tracking Keys (Frontend)**: Generated by `getStateKey()` for message times (sidebar sorting):
-- Channels: `channel-{channel_key}`
-- Contacts: `contact-{12-char-pubkey-prefix}`
-
-**Note:** These are NOT the same as `Message.conversation_key` (the database field).
-
-### Server-Side Decryption
-
-The server can decrypt packets using stored keys, both in real-time and for historical packets.
-
-**Channel messages**: Decrypted automatically when a matching channel key is available.
-
-**Direct messages**: Decrypted server-side using the private key exported from the radio on startup. This enables DM decryption even when the contact isn't loaded on the radio. The private key is stored in memory only (see `keystore.py`).
-
-## MeshCore Library
-
-The `meshcore_py` library provides radio communication. Key patterns:
-
-```python
-# Connection
-mc = await MeshCore.create_serial(port="/dev/ttyUSB0")
-
-# Commands
-await mc.commands.send_msg(dst, msg)
-await mc.commands.send_chan_msg(channel_idx, msg)
-await mc.commands.get_contacts()
-await mc.commands.set_channel(idx, name, key)
-
-# Events
-mc.subscribe(EventType.CONTACT_MSG_RECV, handler)
-mc.subscribe(EventType.CHANNEL_MSG_RECV, handler)
-mc.subscribe(EventType.ACK, handler)
-```
-
-## Environment Variables
-
-| Variable | Default | Description |
-|----------|---------|-------------|
-| `MESHCORE_SERIAL_PORT` | auto-detect | Serial port for radio |
-| `MESHCORE_DATABASE_PATH` | `data/meshcore.db` | SQLite database location |
-| `MESHCORE_MAX_RADIO_CONTACTS` | `200` | Max recent contacts to keep on radio for DM ACKs |
+- `./AGENTS.md` (general project information)
+- `app/AGENTS.md` - Backend (FastAPI, database, radio connection, packet decryption)
+- `frontend/AGENTS.md` - Frontend (React, state management, WebSocket, components)

Dockerfile

@@ -1,13 +1,15 @@
 # Stage 1: Build frontend
 FROM node:20-slim AS frontend-builder
 
+ARG COMMIT_HASH=unknown
+
 WORKDIR /build
 
-COPY frontend/package*.json ./
-RUN npm ci
+COPY frontend/package.json frontend/.npmrc ./
+RUN npm install
 
 COPY frontend/ ./
-RUN npm run build
+RUN VITE_COMMIT_HASH=${COMMIT_HASH} npm run build
 
 
 # Stage 2: Python runtime
@@ -27,6 +29,9 @@ RUN uv sync --frozen --no-dev
 # Copy application code
 COPY app/ ./app/
 
+# Copy license attributions
+COPY LICENSES.md ./
+
 # Copy built frontend from first stage
 COPY --from=frontend-builder /build/dist ./frontend/dist
 
@@ -35,5 +40,5 @@ RUN mkdir -p /app/data
 
 EXPOSE 8000
 
-# Run the application
+# Run the application (we retain root for max compatibility)
 CMD ["uv", "run", "uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]

README.md

@@ -1,31 +1,37 @@
 # RemoteTerm for MeshCore
 
-Backend server + browser interface for MeshCore mesh radio networks. Attach your radio over serial, and then you can:
+Backend server + browser interface for MeshCore mesh radio networks. Connect your radio over Serial, TCP, or BLE, and then you can:
 
-* Send and receive DMs and GroupTexts
+* Send and receive DMs and channel messages
 * Cache all received packets, decrypting as you gain keys
+* Run multiple Python bots that can analyze messages and respond to DMs and channels
 * Monitor unlimited contacts and channels (radio limits don't apply -- packets are decrypted server-side)
 * Access your radio remotely over your network or VPN
-* Brute force hashtag room names for GroupTexts you don't have keys for yet
+* Search for hashtag room names for channels you don't have keys for yet
+* Forward packets to MQTT brokers (private: decrypted messages and/or raw packets; community aggregators like LetsMesh.net: raw packets only)
+* Use the more recent 1.14 firmwares which support multibyte pathing in all traffic and display systems within the app
+* Visualize the mesh as a map or node set, view repeater stats, and more!
 
-**Warning:** This app has no authentication. Run it on a private network only -- do not expose to the internet unless you want strangers sending traffic as you.
+**Warning:** This app has no auth, and is for trusted environments only. _Do not put this on an untrusted network, or open it to the public._ The bots can execute arbitrary Python code which means anyone on your network can, too. To completely disable the bot system, start the server with `MESHCORE_DISABLE_BOTS=true` — this prevents all bot execution and blocks bot configuration changes via the API. If you need access control, consider using a reverse proxy like Nginx, or extending FastAPI; access control and user management are outside the scope of this app.
 
-![Screenshot of the application's web interface](screenshot.png)
+![Screenshot of the application's web interface](app_screenshot.png)
 
 ## Disclaimer
 
-This is entirely vibecoded slop -- no warranty of fitness for any purpose. It's been lovingly guided by an engineer with a passion for clean code and good tests, but it's still mostly LLM output, so you may find some bugs.
+This is developed with very heavy agentic assistance -- there is no warranty of fitness for any purpose. It's been lovingly guided by an engineer with a passion for clean code and good tests, but it's still mostly LLM output, so you may find some bugs.
 
-If extending, have your LLM read the three `CLAUDE.md` files: `./CLAUDE.md`, `./frontend/CLAUDE.md`, and `./app/CLAUDE.md`.
+If extending, have your LLM read the three `AGENTS.md` files: `./AGENTS.md`, `./frontend/AGENTS.md`, and `./app/AGENTS.md`.
 
 ## Requirements
 
 - Python 3.10+
-- Node.js 18+ (for frontend development only)
+- Node.js 18+
 - [UV](https://astral.sh/uv) package manager: `curl -LsSf https://astral.sh/uv/install.sh | sh`
-- MeshCore radio connected via USB serial
+- MeshCore radio connected via USB serial, TCP, or BLE
+
+<details>
+<summary>Finding your serial port</summary>
 
-**Find your serial port:**
 ```bash
 #######
 # Linux
@@ -37,55 +43,111 @@ ls /dev/ttyUSB* /dev/ttyACM*
 #######
 ls /dev/cu.usbserial-* /dev/cu.usbmodem*
 
+###########
+# Windows
+###########
+# In PowerShell:
+Get-CimInstance Win32_SerialPort | Select-Object DeviceID, Caption
+
 ######
 # WSL2
 ######
 # Run this in an elevated PowerShell (not WSL) window
 winget install usbipd
-
 # restart console
-
-# find device ID (e.g. 3-8)
+# then find device ID
 usbipd list
-
-# attach device to WSL
-usbipd bind --busid 3-8
-
+# make device shareable
+usbipd bind --busid 3-8 # (or whatever the right ID is)
+# attach device to WSL (run this each time you plug in the device)
+usbipd attach --wsl --busid 3-8
+# device will appear in WSL as /dev/ttyUSB0 or /dev/ttyACM0
 ```
+</details>
 
 ## Quick Start
 
 **This approach is recommended over Docker due to intermittent serial communications issues I've seen on \*nix systems.**
 
-The frontend is pre-built -- just run the backend:
-
 ```bash
 git clone https://github.com/jkingsman/Remote-Terminal-for-MeshCore.git
 cd Remote-Terminal-for-MeshCore
 
+# Install backend dependencies
 uv sync
+
+# Build frontend
+cd frontend && npm install && npm run build && cd ..
+
+# Run server
 uv run uvicorn app.main:app --host 0.0.0.0 --port 8000
 ```
 
-The server auto-detects the serial port. To specify manually:
+The server auto-detects the serial port. To specify a transport manually:
 ```bash
+# Serial (explicit port)
 MESHCORE_SERIAL_PORT=/dev/ttyUSB0 uv run uvicorn app.main:app --host 0.0.0.0 --port 8000
+
+# TCP (e.g. via wifi-enabled firmware)
+MESHCORE_TCP_HOST=192.168.1.100 MESHCORE_TCP_PORT=4000 uv run uvicorn app.main:app --host 0.0.0.0 --port 8000
+
+# BLE (address and PIN both required)
+MESHCORE_BLE_ADDRESS=AA:BB:CC:DD:EE:FF MESHCORE_BLE_PIN=123456 uv run uvicorn app.main:app --host 0.0.0.0 --port 8000
+```
+
+On Windows (PowerShell), set environment variables as a separate statement:
+```powershell
+$env:MESHCORE_SERIAL_PORT="COM8" # or your COM port
+uv run uvicorn app.main:app --host 0.0.0.0 --port 8000
 ```
 
 Access at http://localhost:8000
 
 > **Note:** WebGPU cracking requires HTTPS when not on localhost. See the HTTPS section under Additional Setup.
 
-## Docker
+## Docker Compose
 
 > **Warning:** Docker has intermittent issues with serial event subscriptions. The native method above is more reliable.
 
+> **Note:** BLE-in-docker is outside the scope of this README, but the env vars should all still work.
+
+Edit `docker-compose.yaml` to set a serial device for passthrough, or uncomment your transport (serial or TCP). Then:
+
 ```bash
-docker run -d \
-  --device=/dev/ttyUSB0 \
-  -v remoteterm-data:/app/data \
-  -p 8000:8000 \
-  jkingsman/remote-terminal-for-meshcore:latest
+docker compose up -d
+```
+
+The database is stored in `./data/` (bind-mounted), so the container shares the same database as the native app. To rebuild after pulling updates:
+
+```bash
+docker compose up -d --build
+```
+
+To use the prebuilt Docker Hub image instead of building locally, replace:
+
+```yaml
+build: .
+```
+
+with:
+
+```yaml
+image: jkingsman/remoteterm-meshcore:latest
+```
+
+Then run:
+
+```bash
+docker compose pull
+docker compose up -d
+```
+
+The container runs as root by default for maximum serial passthrough compatibility across host setups. On Linux, if you switch between native and Docker runs, `./data` can end up root-owned. If you do not need that compatibility behavior, you can enable the optional `user: "${UID:-1000}:${GID:-1000}"` line in `docker-compose.yaml` to keep ownership aligned with your host user.
+
+To stop:
+
+```bash
+docker compose down
 ```
 
 ## Development
@@ -94,12 +156,21 @@ docker run -d \
 
 ```bash
 uv sync
-uv run uvicorn app.main:app --reload
+uv run uvicorn app.main:app --reload # autodetects serial port
 
 # Or with explicit serial port
 MESHCORE_SERIAL_PORT=/dev/ttyUSB0 uv run uvicorn app.main:app --reload
 ```
 
+On Windows (PowerShell):
+```powershell
+uv sync
+$env:MESHCORE_SERIAL_PORT="COM8" # or your COM port
+uv run uvicorn app.main:app --reload
+```
+
+> **Windows note:** I've seen an intermittent startup issue like `"Received empty packet: index out of range"` with failed contact sync. I can't figure out why this happens. The issue typically resolves on restart. If you can figure out why this happens, I will buy you a virtual or iRL six pack if you're in the PNW. As a former always-windows-girlie before embracing WSL2, I despise second-classing M$FT users, but I'm just stuck with this one.
+
 ### Frontend
 
 ```bash
@@ -113,10 +184,16 @@ Run both the backend and `npm run dev` for hot-reloading frontend development.
 
 ### Code Quality & Tests
 
-Please test, lint, format, and quality check your code before PRing or committing. At the least, run a lint + autoformat + pyright check on the bakend, and a lint + autoformat on the frontend.
+Please test, lint, format, and quality check your code before PRing or committing. At the least, run a lint + autoformat + pyright check on the backend, and a lint + autoformat on the frontend.
+
+Run everything at once:
+
+```bash
+./scripts/all_quality.sh
+```
 
 <details>
-<summary>But how?</summary>
+<summary>Or run individual checks</summary>
 
 ```bash
 # python
@@ -139,15 +216,21 @@ npm run build                        # build the frontend
 | Variable | Default | Description |
 |----------|---------|-------------|
 | `MESHCORE_SERIAL_PORT` | (auto-detect) | Serial port path |
-| `MESHCORE_SERIAL_BAUDRATE` | 115200 | Baud rate |
+| `MESHCORE_SERIAL_BAUDRATE` | 115200 | Serial baud rate |
+| `MESHCORE_TCP_HOST` | | TCP host (mutually exclusive with serial/BLE) |
+| `MESHCORE_TCP_PORT` | 4000 | TCP port |
+| `MESHCORE_BLE_ADDRESS` | | BLE device address (mutually exclusive with serial/TCP) |
+| `MESHCORE_BLE_PIN` | | BLE PIN (required when BLE address is set) |
 | `MESHCORE_LOG_LEVEL` | INFO | DEBUG, INFO, WARNING, ERROR |
 | `MESHCORE_DATABASE_PATH` | data/meshcore.db | SQLite database path |
-| `MESHCORE_MAX_RADIO_CONTACTS` | 200 | Max recent contacts to keep on radio for DM ACKs |
+| `MESHCORE_DISABLE_BOTS` | false | Disable bot system entirely (blocks execution and config) |
+
+Only one transport may be active at a time. If multiple are set, the server will refuse to start.
 
 ## Additional Setup
 
 <details>
-<summary>HTTPS (Required for WebGPU Cracking outside localhost)</summary>
+<summary>HTTPS (Required for WebGPU room-finding outside localhost)</summary>
 
 WebGPU requires a secure context. When not on `localhost`, serve over HTTPS:
 
@@ -156,21 +239,21 @@ openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365 -node
 uv run uvicorn app.main:app --host 0.0.0.0 --port 8000 --ssl-keyfile=key.pem --ssl-certfile=cert.pem
 ```
 
-For Docker:
+For Docker Compose, generate the cert and add the volume mounts and command override to `docker-compose.yaml`:
 
 ```bash
-# generate TLS cert
+# generate snakeoil TLS cert
 openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365 -nodes -subj '/CN=localhost'
+```
 
-# run with cert
-docker run -d \
-  --device=/dev/ttyUSB0 \
-  -v remoteterm-data:/app/data \
-  -v $(pwd)/cert.pem:/app/cert.pem:ro \
-  -v $(pwd)/key.pem:/app/key.pem:ro \
-  -p 8000:8000 \
-  jkingsman/remote-terminal-for-meshcore:latest \
-  uv run uvicorn app.main:app --host 0.0.0.0 --port 8000 --ssl-keyfile=/app/key.pem --ssl-certfile=/app/cert.pem
+Then add the key and cert to the `remoteterm` service in `docker-compose.yaml`, and add an explicit launch command that uses them:
+
+```yaml
+    volumes:
+      - ./data:/app/data
+      - ./cert.pem:/app/cert.pem:ro
+      - ./key.pem:/app/key.pem:ro
+    command: uv run uvicorn app.main:app --host 0.0.0.0 --port 8000 --ssl-keyfile=/app/key.pem --ssl-certfile=/app/cert.pem
 ```
 
 Accept the browser warning, or use [mkcert](https://github.com/FiloSottile/mkcert) for locally-trusted certs.
@@ -179,6 +262,8 @@ Accept the browser warning, or use [mkcert](https://github.com/FiloSottile/mkcer
 <details>
 <summary>Systemd Service (Linux)</summary>
 
+Assumes you're running from `/opt/remoteterm`; update commands and `remoteterm.service` if you're running elsewhere.
+
 ```bash
 # Create service user
 sudo useradd -r -m -s /bin/false remoteterm
@@ -193,7 +278,7 @@ cd /opt/remoteterm
 sudo -u remoteterm uv venv
 sudo -u remoteterm uv sync
 
-# Build frontend (optional -- already built in repo and served by backend)
+# Build frontend (required for the backend to serve the web UI)
 cd /opt/remoteterm/frontend
 sudo -u remoteterm npm install
 sudo -u remoteterm npm run build
@@ -215,17 +300,41 @@ Edit `/etc/systemd/system/remoteterm.service` to set `MESHCORE_SERIAL_PORT` if n
 <summary>Testing</summary>
 
 **Backend:**
+
 ```bash
 PYTHONPATH=. uv run pytest tests/ -v
 ```
 
 **Frontend:**
+
 ```bash
 cd frontend
 npm run test:run
 ```
+
+**E2E:**
+
+Warning: these tests are only guaranteed to run correctly in a narrow subset of environments; they require a busy mesh with messages arriving constantly and an available autodetect-able radio, as well as a contact in the test database (which you can provide in `tests/e2e/.tmp/e2e-test.db` after an initial run). E2E tests are generally not necessary to run for normal development work.
+
+```bash
+cd tests/e2e
+npx playwright test # headless
+npx playwright test --headed # show the browser window
+```
 </details>
 
 ## API Documentation
 
 With the backend running: http://localhost:8000/docs
+
+## Debugging & Bug Reports
+
+If you're experiencing issues or opening a bug report, please start the backend with debug logging enabled. Debug mode provides a much more detailed breakdown of radio communication, packet processing, and other internal operations, which makes it significantly easier to diagnose problems.
+
+To start the server with debug logging:
+
+```bash
+MESHCORE_LOG_LEVEL=DEBUG uv run uvicorn app.main:app --host 0.0.0.0 --port 8000
+```
+
+Please include the relevant debug log output when filing an issue on GitHub.

app/AGENTS.md

@@ -0,0 +1,338 @@
+# Backend AGENTS.md
+
+This document is the backend working guide for agents and developers.
+Keep it aligned with `app/` source files and router behavior.
+
+## Stack
+
+- FastAPI
+- aiosqlite
+- Pydantic
+- MeshCore Python library (`meshcore` from PyPI)
+- PyCryptodome
+
+## Backend Map
+
+```text
+app/
+├── main.py              # App startup/lifespan, router registration, static frontend mounting
+├── config.py            # Env-driven runtime settings
+├── database.py          # SQLite connection + base schema + migration runner
+├── migrations.py        # Schema migrations (SQLite user_version)
+├── models.py            # Pydantic request/response models
+├── repository/          # Data access layer (contacts, channels, messages, raw_packets, settings, fanout)
+├── radio.py             # RadioManager + auto-reconnect monitor
+├── radio_sync.py        # Polling, sync, periodic advertisement loop
+├── decoder.py           # Packet parsing/decryption
+├── packet_processor.py  # Raw packet pipeline, dedup, path handling
+├── event_handlers.py    # MeshCore event subscriptions and ACK tracking
+├── websocket.py         # WS manager + broadcast helpers
+├── fanout/              # Fanout bus: MQTT, bots, webhooks, Apprise (see fanout/AGENTS_fanout.md)
+├── dependencies.py      # Shared FastAPI dependency providers
+├── path_utils.py        # Path hex rendering and hop-width helpers
+├── keystore.py          # Ephemeral private/public key storage for DM decryption
+├── frontend_static.py   # Mount/serve built frontend (production)
+└── routers/
+    ├── health.py
+    ├── radio.py
+    ├── contacts.py
+    ├── channels.py
+    ├── messages.py
+    ├── packets.py
+    ├── read_state.py
+    ├── settings.py
+    ├── fanout.py
+    ├── repeaters.py
+    ├── statistics.py
+    └── ws.py
+```
+
+## Core Runtime Flows
+
+### Incoming data
+
+1. Radio emits events.
+2. `on_rx_log_data` stores raw packet and tries decrypt/pipeline handling.
+3. Decrypted messages are inserted into `messages` and broadcast over WS.
+4. `CONTACT_MSG_RECV` is a fallback DM path when packet pipeline cannot decrypt.
+
+### Outgoing messages
+
+1. Send endpoints in `routers/messages.py` call MeshCore commands.
+2. Message is persisted as outgoing.
+3. Endpoint broadcasts WS `message` event so all live clients update.
+4. ACK/repeat updates arrive later as `message_acked` events.
+5. Channel resend (`POST /messages/channel/{id}/resend`) strips the sender name prefix by exact match against the current radio name. This assumes the radio name hasn't changed between the original send and the resend. Name changes require an explicit radio config update and are rare, but the `new_timestamp=true` resend path has no time window, so a mismatch is possible if the name was changed between the original send and a later resend.
+
+### Connection lifecycle
+
+- `RadioManager.start_connection_monitor()` checks health every 5s.
+- Monitor reconnect path runs `post_connect_setup()` before broadcasting healthy state.
+- Manual reconnect/reboot endpoints call `reconnect()` then `post_connect_setup()`.
+- Setup includes handler registration, key export, time sync, contact/channel sync, polling/advert tasks.
+
+## Important Behaviors
+
+### Multibyte routing
+
+- Packet `path_len` values are hop counts, not byte counts.
+- Hop width comes from the packet or radio `path_hash_mode`: `0` = 1-byte, `1` = 2-byte, `2` = 3-byte.
+- Contacts persist `out_path_hash_mode` in the database so contact sync and outbound DM routing reuse the exact stored mode instead of inferring from path bytes.
+- `contact_advert_paths` identity is `(public_key, path_hex, path_len)` because the same hex bytes can represent different routes at different hop widths.
+
+### Read/unread state
+
+- Server is source of truth (`contacts.last_read_at`, `channels.last_read_at`).
+- `GET /api/read-state/unreads` returns counts, mention flags, and `last_message_times`.
+
+### Echo/repeat dedup
+
+- Message uniqueness: `(type, conversation_key, text, sender_timestamp)`.
+- Duplicate insert is treated as an echo/repeat: the new path (if any) is appended, and the ACK count is incremented **only for outgoing messages**. Incoming repeats add path data but do not change the ACK count.
+
+### Raw packet dedup policy
+
+- Raw packet storage deduplicates by payload hash (`RawPacketRepository.create`), excluding routing/path bytes.
+- Stored packet `id` is therefore a payload identity, not a per-arrival identity.
+- Realtime raw-packet WS broadcasts include `observation_id` (unique per RF arrival) in addition to `id`.
+- Frontend packet-feed features should key/dedupe by `observation_id`; use `id` only as the storage reference.
+- Message-layer repeat handling (`_handle_duplicate_message` + `MessageRepository.add_path`) is separate from raw-packet storage dedup.
+
+### Contact sync throttle
+
+- `sync_recent_contacts_to_radio()` sets `_last_contact_sync = now` before the sync completes.
+- This is intentional: if sync fails, the next attempt is still throttled to prevent a retry-storm against a flaky radio. Contacts will resync on the next scheduled cycle or on reconnect.
+
+### Periodic advertisement
+
+- Controlled by `app_settings.advert_interval` (seconds).
+- `0` means disabled.
+- Last send time tracked in `app_settings.last_advert_time`.
+
+### Fanout bus
+
+- All external integrations (MQTT, bots, webhooks, Apprise) are managed through the fanout bus (`app/fanout/`).
+- Configs stored in `fanout_configs` table, managed via `GET/POST/PATCH/DELETE /api/fanout`.
+- `broadcast_event()` in `websocket.py` dispatches to the fanout manager for `message` and `raw_packet` events.
+- Each integration is a `FanoutModule` with scope-based filtering.
+- Community MQTT publishes raw packets only, but its derived `path` field for direct packets is emitted as comma-separated hop identifiers, not flat path bytes.
+- See `app/fanout/AGENTS_fanout.md` for full architecture details.
+
+## API Surface (all under `/api`)
+
+### Health
+- `GET /health`
+
+### Radio
+- `GET /radio/config` — includes `path_hash_mode` and `path_hash_mode_supported`
+- `PATCH /radio/config` — may update `path_hash_mode` (`0..2`) when firmware supports it
+- `PUT /radio/private-key`
+- `POST /radio/advertise`
+- `POST /radio/reboot`
+- `POST /radio/reconnect`
+
+### Contacts
+- `GET /contacts`
+- `GET /contacts/repeaters/advert-paths` — recent advert paths for all contacts
+- `GET /contacts/{public_key}`
+- `GET /contacts/{public_key}/detail` — comprehensive contact profile (stats, name history, paths, nearest repeaters)
+- `GET /contacts/{public_key}/advert-paths` — recent advert paths for one contact
+- `POST /contacts`
+- `DELETE /contacts/{public_key}`
+- `POST /contacts/sync`
+- `POST /contacts/{public_key}/add-to-radio`
+- `POST /contacts/{public_key}/remove-from-radio`
+- `POST /contacts/{public_key}/mark-read`
+- `POST /contacts/{public_key}/command`
+- `POST /contacts/{public_key}/reset-path`
+- `POST /contacts/{public_key}/trace`
+- `POST /contacts/{public_key}/repeater/login`
+- `POST /contacts/{public_key}/repeater/status`
+- `POST /contacts/{public_key}/repeater/lpp-telemetry`
+- `POST /contacts/{public_key}/repeater/neighbors`
+- `POST /contacts/{public_key}/repeater/acl`
+- `POST /contacts/{public_key}/repeater/radio-settings`
+- `POST /contacts/{public_key}/repeater/advert-intervals`
+- `POST /contacts/{public_key}/repeater/owner-info`
+
+### Channels
+- `GET /channels`
+- `GET /channels/{key}/detail`
+- `GET /channels/{key}`
+- `POST /channels`
+- `DELETE /channels/{key}`
+- `POST /channels/sync`
+- `POST /channels/{key}/mark-read`
+
+### Messages
+- `GET /messages` — list with filters; supports `q` (full-text search), `after`/`after_id` (forward cursor)
+- `GET /messages/around/{message_id}` — context messages around a target (for jump-to-message navigation)
+- `POST /messages/direct`
+- `POST /messages/channel`
+- `POST /messages/channel/{message_id}/resend`
+
+### Packets
+- `GET /packets/undecrypted/count`
+- `POST /packets/decrypt/historical`
+- `POST /packets/maintenance`
+
+### Read state
+- `GET /read-state/unreads`
+- `POST /read-state/mark-all-read`
+
+### Settings
+- `GET /settings`
+- `PATCH /settings`
+- `POST /settings/favorites/toggle`
+- `POST /settings/blocked-keys/toggle`
+- `POST /settings/blocked-names/toggle`
+- `POST /settings/migrate`
+
+### Fanout
+- `GET /fanout` — list all fanout configs
+- `POST /fanout` — create new fanout config
+- `PATCH /fanout/{id}` — update fanout config (triggers module reload)
+- `DELETE /fanout/{id}` — delete fanout config (stops module)
+
+### Statistics
+- `GET /statistics` — aggregated mesh network stats (entity counts, message/packet splits, activity windows, busiest channels)
+
+### WebSocket
+- `WS /ws`
+
+## WebSocket Events
+
+- `health` — radio connection status (broadcast on change, personal on connect)
+- `contact` — single contact upsert (from advertisements and radio sync)
+- `message` — new message (channel or DM, from packet processor or send endpoints)
+- `message_acked` — ACK/echo update for existing message (ack count + paths)
+- `raw_packet` — every incoming RF packet (for real-time packet feed UI)
+- `contact_deleted` — contact removed from database (payload: `{ public_key }`)
+- `channel_deleted` — channel removed from database (payload: `{ key }`)
+- `error` — toast notification (reconnect failure, missing private key, etc.)
+- `success` — toast notification (historical decrypt complete, etc.)
+
+Initial WS connect sends `health` only. Contacts/channels are loaded by REST.
+Client sends `"ping"` text; server replies `{"type":"pong"}`.
+
+## Data Model Notes
+
+Main tables:
+- `contacts` (includes `first_seen` for contact age tracking and `out_path_hash_mode` for route round-tripping)
+- `channels`
+- `messages` (includes `sender_name`, `sender_key` for per-contact channel message attribution)
+- `raw_packets`
+- `contact_advert_paths` (recent unique advertisement paths per contact, keyed by contact + path bytes + hop count)
+- `contact_name_history` (tracks name changes over time)
+- `app_settings`
+
+`app_settings` fields in active model:
+- `max_radio_contacts`
+- `favorites`
+- `auto_decrypt_dm_on_advert`
+- `sidebar_sort_order`
+- `last_message_times`
+- `preferences_migrated`
+- `advert_interval`
+- `last_advert_time`
+- `flood_scope`
+- `blocked_keys`, `blocked_names`
+
+Note: MQTT, community MQTT, and bot configs were migrated to the `fanout_configs` table (migrations 36-38).
+
+## Security Posture (intentional)
+
+- No authn/authz.
+- No CORS restriction (`*`).
+- Bot code executes user-provided Python via `exec()`.
+
+These are product decisions for trusted-network deployments; do not flag as accidental vulnerabilities.
+
+## Testing
+
+Run backend tests:
+
+```bash
+PYTHONPATH=. uv run pytest tests/ -v
+```
+
+Test suites:
+
+```text
+tests/
+├── conftest.py                 # Shared fixtures
+├── test_ack_tracking_wiring.py # DM ACK tracking extraction and wiring
+├── test_api.py                 # REST endpoint integration tests
+├── test_bot.py                 # Bot execution and sandboxing
+├── test_channels_router.py     # Channels router endpoints
+├── test_config.py              # Configuration validation
+├── test_contacts_router.py     # Contacts router endpoints
+├── test_decoder.py             # Packet parsing/decryption
+├── test_disable_bots.py        # MESHCORE_DISABLE_BOTS=true feature
+├── test_echo_dedup.py          # Echo/repeat deduplication (incl. concurrent)
+├── test_fanout.py              # Fanout bus CRUD, scope matching, manager dispatch
+├── test_fanout_integration.py  # Fanout integration tests
+├── test_event_handlers.py      # ACK tracking, event registration, cleanup
+├── test_frontend_static.py     # Frontend static file serving
+├── test_health_mqtt_status.py  # Health endpoint MQTT status field
+├── test_key_normalization.py   # Public key normalization
+├── test_keystore.py            # Ephemeral keystore
+├── test_message_pagination.py  # Cursor-based message pagination
+├── test_message_prefix_claim.py # Message prefix claim logic
+├── test_migrations.py          # Schema migration system
+├── test_community_mqtt.py      # Community MQTT publisher (JWT, packet format, hash, broadcast)
+├── test_mqtt.py                # MQTT publisher topic routing and lifecycle
+├── test_packet_pipeline.py     # End-to-end packet processing
+├── test_packets_router.py      # Packets router endpoints (decrypt, maintenance)
+├── test_radio.py               # RadioManager, serial detection
+├── test_real_crypto.py         # Real cryptographic operations
+├── test_radio_operation.py     # radio_operation() context manager
+├── test_radio_router.py        # Radio router endpoints
+├── test_radio_sync.py          # Polling, sync, advertisement
+├── test_repeater_routes.py     # Repeater command/telemetry/trace + granular pane endpoints
+├── test_repository.py          # Data access layer
+├── test_rx_log_data.py         # on_rx_log_data event handler integration
+├── test_messages_search.py      # Message search, around, forward pagination
+├── test_block_lists.py          # Blocked keys/names filtering
+├── test_send_messages.py       # Outgoing messages, bot triggers, concurrent sends
+├── test_settings_router.py     # Settings endpoints, advert validation
+├── test_statistics.py          # Statistics aggregation
+├── test_channel_sender_backfill.py # Sender key backfill for channel messages
+├── test_fanout_hitlist.py      # Fanout-related hitlist regression tests
+├── test_main_startup.py        # App startup and lifespan
+├── test_path_utils.py          # Path hex rendering helpers
+├── test_websocket.py           # WS manager broadcast/cleanup
+└── test_websocket_route.py     # WS endpoint lifecycle
+```
+
+## Errata & Known Non-Issues
+
+### Sender timestamps are 1-second resolution (protocol constraint)
+
+The MeshCore radio protocol encodes `sender_timestamp` as a 4-byte little-endian integer (Unix seconds). This is a firmware-level wire format — the radio, the Python library (`commands/messaging.py`), and the decoder (`decoder.py`) all read/write exactly 4 bytes. Millisecond Unix timestamps would overflow 4 bytes, so higher resolution is not possible without a firmware change.
+
+**Consequence:** The dedup index `(type, conversation_key, text, COALESCE(sender_timestamp, 0))` operates at 1-second granularity. Sending identical text to the same conversation twice within one second will hit the UNIQUE constraint on the second insert, returning HTTP 500 *after* the radio has already transmitted. The message is sent over the air but not stored in the database. Do not attempt to fix this by switching to millisecond timestamps — it will break echo dedup (the echo's 4-byte timestamp won't match the stored value) and overflow `to_bytes(4, "little")`.
+
+### Outgoing DM echoes remain undecrypted
+
+When our own outgoing DM is heard back via `RX_LOG_DATA` (self-echo, loopback), `_process_direct_message` passes `our_public_key=None` for the outgoing direction, disabling the outbound hash check in the decoder. The decoder's inbound check (`src_hash == their_first_byte`) fails because the source is us, not the contact — so decryption returns `None`. This is by design: outgoing DMs are stored directly by the send endpoint, so no message is lost.
+
+### Infinite setup retry on connection monitor
+
+When `post_connect_setup()` fails (e.g. `export_and_store_private_key` raises `RuntimeError` because the radio didn't respond), `_setup_complete` is never set to `True`. The connection monitor sees `connected and not setup_complete` and retries every 5 seconds — indefinitely. This is intentional: the radio may be rebooting, waking from sleep, or otherwise temporarily unresponsive. We keep retrying so that setup completes automatically once the radio becomes available, without requiring manual intervention.
+
+### DELETE channel returns 200 for non-existent keys
+
+`DELETE /api/channels/{key}` returns `{"status": "ok"}` even if the key didn't exist. This is intentional — the postcondition is "channel doesn't exist," which is satisfied regardless of whether it existed before. No 404 needed.
+
+### Contact lat/lon 0.0 vs NULL
+
+MeshCore uses `0.0` as the sentinel for "no GPS coordinates" (see `models.py` `to_radio_dict`). The upsert SQL uses `COALESCE(excluded.lat, contacts.lat)`, which preserves existing values when the new value is `NULL` — but `0.0` is not `NULL`, so it overwrites previously valid coordinates. This is intentional: we always want the most recent location data. If a device stops broadcasting GPS, the old coordinates are presumably stale/wrong, so overwriting with "not available" (`0.0`) is the correct behavior.
+
+## Editing Checklist
+
+When changing backend behavior:
+1. Update/add router and repository tests.
+2. Confirm WS event contracts when payload shape changes.
+3. Run `PYTHONPATH=. uv run pytest tests/ -v`.
+4. If API contract changed, update frontend types and AGENTS docs.

app/CLAUDE.md

@@ -1,642 +0,0 @@
-# Backend CLAUDE.md
-
-This document provides context for AI assistants and developers working on the FastAPI backend.
-
-## Technology Stack
-
-- **FastAPI** - Async web framework with automatic OpenAPI docs
-- **aiosqlite** - Async SQLite driver
-- **meshcore** - MeshCore radio library (local dependency at `../meshcore_py`)
-- **Pydantic** - Data validation and settings management
-- **PyCryptodome** - AES-128 encryption for packet decryption
-- **UV** - Python package manager
-
-## Directory Structure
-
-```
-app/
-├── main.py           # FastAPI app, lifespan, router registration, static file serving
-├── config.py         # Pydantic settings (env vars: MESHCORE_*)
-├── database.py       # SQLite schema, connection management, runs migrations
-├── migrations.py     # Database migrations using SQLite user_version pragma
-├── models.py         # Pydantic models for API request/response
-├── repository.py     # Database CRUD (ContactRepository, ChannelRepository, etc.)
-├── radio.py          # RadioManager - serial connection to MeshCore device
-├── radio_sync.py     # Periodic sync, contact auto-loading to radio
-├── decoder.py        # Packet decryption (channel + direct messages)
-├── packet_processor.py # Raw packet processing, advertisement handling
-├── keystore.py       # Ephemeral key store (private key in memory only)
-├── event_handlers.py # Radio event subscriptions, ACK tracking, repeat detection
-├── websocket.py      # WebSocketManager for real-time client updates
-└── routers/          # All routes prefixed with /api
-    ├── health.py     # GET /api/health
-    ├── radio.py      # Radio config, advertise, private key, reboot
-    ├── contacts.py   # Contact CRUD, radio sync, mark-read
-    ├── channels.py   # Channel CRUD, radio sync, mark-read
-    ├── messages.py   # Message list and send (direct/channel)
-    ├── packets.py    # Raw packet endpoints, historical decryption
-    ├── read_state.py # Bulk read state operations (mark-all-read)
-    ├── settings.py   # App settings (max_radio_contacts)
-    └── ws.py         # WebSocket endpoint at /api/ws
-```
-
-## Key Architectural Patterns
-
-### Repository Pattern
-
-All database operations go through repository classes in `repository.py`:
-
-```python
-from app.repository import ContactRepository, ChannelRepository, MessageRepository, RawPacketRepository, AppSettingsRepository
-
-# Examples
-contact = await ContactRepository.get_by_key_prefix("abc123")
-await MessageRepository.create(msg_type="PRIV", text="Hello", received_at=timestamp)
-await RawPacketRepository.mark_decrypted(packet_id, message_id)
-
-# App settings (single-row pattern)
-settings = await AppSettingsRepository.get()
-await AppSettingsRepository.update(auto_decrypt_dm_on_advert=True)
-await AppSettingsRepository.add_favorite("contact", public_key)
-await AppSettingsRepository.update_last_message_time("channel-KEY", timestamp)
-```
-
-### Radio Connection
-
-`RadioManager` in `radio.py` handles serial connection:
-
-```python
-from app.radio import radio_manager
-
-# Access meshcore instance
-if radio_manager.meshcore:
-    await radio_manager.meshcore.commands.send_msg(dst, msg)
-```
-
-Auto-detection scans common serial ports when `MESHCORE_SERIAL_PORT` is not set.
-
-### Event-Driven Architecture
-
-Radio events flow through `event_handlers.py`:
-
-| Event | Handler | Actions |
-|-------|---------|---------|
-| `CONTACT_MSG_RECV` | `on_contact_message` | Store message, update contact last_seen, broadcast via WS |
-| `CHANNEL_MSG_RECV` | `on_channel_message` | Store message, broadcast via WS |
-| `RAW_DATA` | `on_raw_data` | Store packet, try decrypt with all channel keys, detect repeats |
-| `ADVERTISEMENT` | `on_advertisement` | Upsert contact with location |
-| `ACK` | `on_ack` | Match pending ACKs, mark message acked, broadcast |
-
-### WebSocket Broadcasting
-
-Real-time updates use `ws_manager` singleton:
-
-```python
-from app.websocket import ws_manager
-
-# Broadcast to all connected clients
-await ws_manager.broadcast("message", {"id": 1, "text": "Hello"})
-```
-
-Event types: `health`, `contacts`, `channels`, `message`, `contact`, `raw_packet`, `message_acked`, `error`
-
-Helper functions for common broadcasts:
-
-```python
-from app.websocket import broadcast_error, broadcast_health
-
-# Notify clients of errors (shows toast in frontend)
-broadcast_error("Operation failed", "Additional details")
-
-# Notify clients of connection status change
-broadcast_health(radio_connected=True, serial_port="/dev/ttyUSB0")
-```
-
-### Connection Monitoring
-
-`RadioManager` includes a background task that monitors connection status:
-
-- Checks connection every 5 seconds
-- Broadcasts `health` event on status change
-- Attempts automatic reconnection when connection lost
-- **Re-registers event handlers after successful auto-reconnect** (critical for message delivery)
-- Resilient to transient errors (logs and continues rather than crashing)
-- Supports manual reconnection via `POST /api/radio/reconnect`
-
-```python
-from app.radio import radio_manager
-
-# Manual reconnection
-success = await radio_manager.reconnect()
-
-# Background monitor (started automatically in app lifespan)
-await radio_manager.start_connection_monitor()
-await radio_manager.stop_connection_monitor()
-```
-
-### Message Polling
-
-Periodic message polling serves as a fallback for platforms where push events are unreliable.
-Use `pause_polling()` to temporarily suspend polling during operations that need exclusive
-radio access (e.g., repeater CLI commands):
-
-```python
-from app.radio_sync import pause_polling, is_polling_paused
-
-# Pause polling during sensitive operations (supports nesting)
-async with pause_polling():
-    # Polling is paused here
-    await do_repeater_operation()
-
-    async with pause_polling():
-        # Still paused (nested)
-        await do_another_operation()
-
-    # Still paused (outer context active)
-
-# Polling resumes when all contexts exit
-
-# Check current state
-if is_polling_paused():
-    print("Polling is currently paused")
-```
-
-## Database Schema
-
-```sql
-contacts (
-    public_key TEXT PRIMARY KEY,  -- 64-char hex
-    name TEXT,
-    type INTEGER DEFAULT 0,       -- 0=unknown, 1=client, 2=repeater, 3=room
-    flags INTEGER DEFAULT 0,
-    last_path TEXT,               -- Routing path hex
-    last_path_len INTEGER DEFAULT -1,
-    last_advert INTEGER,          -- Unix timestamp of last advertisement
-    lat REAL, lon REAL,
-    last_seen INTEGER,
-    on_radio INTEGER DEFAULT 0,   -- Boolean: contact loaded on radio
-    last_contacted INTEGER,       -- Unix timestamp of last message sent/received
-    last_read_at INTEGER          -- Unix timestamp when conversation was last read
-)
-
-channels (
-    key TEXT PRIMARY KEY,         -- 32-char hex channel key
-    name TEXT NOT NULL,
-    is_hashtag INTEGER DEFAULT 0, -- Key derived from SHA256(name)[:16]
-    on_radio INTEGER DEFAULT 0,
-    last_read_at INTEGER          -- Unix timestamp when channel was last read
-)
-
-messages (
-    id INTEGER PRIMARY KEY,
-    type TEXT NOT NULL,           -- 'PRIV' or 'CHAN'
-    conversation_key TEXT NOT NULL, -- User pubkey for PRIV, channel key for CHAN
-    text TEXT NOT NULL,
-    sender_timestamp INTEGER,
-    received_at INTEGER NOT NULL,
-    path TEXT,                    -- Hex-encoded routing path (2 chars per hop), null for outgoing
-    txt_type INTEGER DEFAULT 0,
-    signature TEXT,
-    outgoing INTEGER DEFAULT 0,
-    acked INTEGER DEFAULT 0,
-    UNIQUE(type, conversation_key, text, sender_timestamp)  -- Deduplication
-)
-
-raw_packets (
-    id INTEGER PRIMARY KEY,
-    timestamp INTEGER NOT NULL,
-    data BLOB NOT NULL,           -- Raw packet bytes
-    decrypted INTEGER DEFAULT 0,
-    message_id INTEGER,           -- FK to messages if decrypted
-    decrypt_attempts INTEGER DEFAULT 0,
-    last_attempt INTEGER,
-    FOREIGN KEY (message_id) REFERENCES messages(id)
-)
-
-app_settings (
-    id INTEGER PRIMARY KEY CHECK (id = 1),  -- Single-row pattern
-    max_radio_contacts INTEGER DEFAULT 200,
-    favorites TEXT DEFAULT '[]',            -- JSON array of {type, id}
-    auto_decrypt_dm_on_advert INTEGER DEFAULT 0,
-    sidebar_sort_order TEXT DEFAULT 'recent',  -- 'recent' or 'alpha'
-    last_message_times TEXT DEFAULT '{}',   -- JSON object of state_key -> timestamp
-    preferences_migrated INTEGER DEFAULT 0  -- One-time migration flag
-)
-```
-
-## Database Migrations (`migrations.py`)
-
-Schema migrations use SQLite's `user_version` pragma for version tracking:
-
-```python
-from app.migrations import get_version, set_version, run_migrations
-
-# Check current schema version
-version = await get_version(conn)  # Returns int (0 for new/unmigrated DB)
-
-# Run pending migrations (called automatically on startup)
-applied = await run_migrations(conn)  # Returns number of migrations applied
-```
-
-### How It Works
-
-1. `database.py` calls `run_migrations()` after schema initialization
-2. Each migration checks `user_version` and runs if needed
-3. Migrations are idempotent (safe to run multiple times)
-4. `ALTER TABLE ADD COLUMN` handles existing columns gracefully
-
-### Adding a New Migration
-
-```python
-# In migrations.py
-async def run_migrations(conn: aiosqlite.Connection) -> int:
-    version = await get_version(conn)
-    applied = 0
-
-    if version < 1:
-        await _migrate_001_add_last_read_at(conn)
-        await set_version(conn, 1)
-        applied += 1
-
-    # Add new migrations here:
-    # if version < 2:
-    #     await _migrate_002_something(conn)
-    #     await set_version(conn, 2)
-    #     applied += 1
-
-    return applied
-```
-
-## Packet Decryption (`decoder.py`)
-
-The decoder handles MeshCore packet decryption for historical packet analysis:
-
-### Packet Types
-
-```python
-class PayloadType(IntEnum):
-    GROUP_TEXT = 0x05      # Channel messages (decryptable)
-    TEXT_MESSAGE = 0x02   # Direct messages
-    ACK = 0x03
-    ADVERT = 0x04
-    # ... see decoder.py for full list
-```
-
-### Channel Key Derivation
-
-Hashtag channels derive keys from name:
-```python
-channel_key = hashlib.sha256(b"#channelname").digest()[:16]
-```
-
-### Decryption Flow
-
-1. Parse packet header to get payload type
-2. For `GROUP_TEXT`: extract channel_hash (1 byte), cipher_mac (2 bytes), ciphertext
-3. Verify HMAC-SHA256 using 32-byte secret (key + 16 zero bytes)
-4. Decrypt with AES-128 ECB
-5. Parse decrypted content: timestamp (4 bytes), flags (1 byte), "sender: message" text
-
-```python
-from app.decoder import try_decrypt_packet_with_channel_key
-
-result = try_decrypt_packet_with_channel_key(raw_bytes, channel_key)
-if result:
-    print(f"{result.sender}: {result.message}")
-```
-
-### Direct Message Decryption
-
-Direct messages use ECDH key exchange (Ed25519 → X25519) for shared secret derivation.
-
-**Key storage**: The private key is exported from the radio on startup and stored in memory
-via `keystore.py`. This enables server-side DM decryption even when contacts aren't loaded
-on the radio.
-
-**Real-time decryption**: When a `RAW_DATA` event contains a `TEXT_MESSAGE` packet, the
-`packet_processor.py` attempts to decrypt it using known contact public keys and the
-stored private key.
-
-**Historical decryption**: When creating a contact with `try_historical=True`, the server
-attempts to decrypt all stored `TEXT_MESSAGE` packets for that contact.
-
-**Direction detection**: The decoder uses the 1-byte dest_hash and src_hash to determine
-if a message is incoming or outgoing. Edge case: when both bytes match (1/256 chance),
-defaults to treating as incoming.
-
-```python
-from app.decoder import try_decrypt_dm
-
-result = try_decrypt_dm(raw_bytes, private_key, contact_public_key)
-if result:
-    print(f"{result.message} (timestamp={result.timestamp})")
-```
-
-## Advertisement Parsing (`decoder.py`)
-
-Advertisement packets contain contact information including optional GPS coordinates.
-
-### Packet Structure
-
-```
-Bytes 0-31:   Public key (32 bytes)
-Bytes 32-35:  Timestamp (4 bytes, little-endian Unix timestamp)
-Bytes 36-99:  Signature (64 bytes)
-Byte 100:     App flags
-Bytes 101+:   Optional fields (location, name) based on flags
-```
-
-### App Flags (byte 100)
-
-- Bits 0-3: Device role (1=Chat, 2=Repeater, 3=Room, 4=Sensor)
-- Bit 4: Has location (lat/lon follow)
-- Bit 5: Has feature 1
-- Bit 6: Has feature 2
-- Bit 7: Has name (null-terminated string at end)
-
-### GPS Extraction
-
-When bit 4 is set, latitude and longitude follow as signed int32 little-endian values,
-divided by 1,000,000 to get decimal degrees:
-
-```python
-from app.decoder import parse_advertisement
-
-advert = parse_advertisement(payload_bytes)
-if advert:
-    print(f"Device role: {advert.device_role}")  # 1=Chat, 2=Repeater
-    if advert.lat and advert.lon:
-        print(f"Location: {advert.lat}, {advert.lon}")
-```
-
-### Data Flow
-
-1. `event_handlers.py` receives ADVERTISEMENT event
-2. `packet_processor.py` calls `parse_advertisement()` to extract data
-3. Contact is upserted with location data (`lat`, `lon`) and `device_role` as `type`
-4. Frontend MapView displays contacts with GPS coordinates
-
-## ACK and Repeat Detection
-
-The `acked` field is an integer count, not a boolean:
-- `0` = not acked
-- `1` = one ACK/echo received
-- `2+` = multiple flood echoes received
-
-### Direct Message ACKs
-
-When sending a direct message, an expected ACK code is tracked:
-```python
-from app.event_handlers import track_pending_ack
-
-track_pending_ack(expected_ack="abc123", message_id=42, timeout_ms=30000)
-```
-
-When ACK event arrives, the message's ack count is incremented.
-
-### Channel Message Repeats
-
-Flood messages echo back through repeaters. Detection uses:
-- Channel key
-- Text hash
-- Timestamp (±5 second window)
-
-Each repeat increments the ack count. The frontend displays:
-- `?` = no acks
-- `✓` = 1 echo
-- `✓2`, `✓3`, etc. = multiple echoes (real-time updates via WebSocket)
-
-### Auto-Contact Sync to Radio
-
-To enable the radio to auto-ACK incoming DMs, recent non-repeater contacts are
-automatically loaded to the radio. Configured via `max_radio_contacts` setting (default 200).
-
-- Triggered on each advertisement from a non-repeater contact
-- Loads most recently contacted non-repeaters (by `last_contacted` timestamp)
-- Throttled to at most once per 30 seconds
-- `last_contacted` updated on message send/receive
-
-```python
-from app.radio_sync import sync_recent_contacts_to_radio
-
-result = await sync_recent_contacts_to_radio(force=True)
-# Returns: {"loaded": 5, "already_on_radio": 195, "failed": 0}
-```
-
-## API Endpoints
-
-All endpoints are prefixed with `/api`.
-
-### Health
-- `GET /api/health` - Connection status, serial port
-
-### Radio
-- `GET /api/radio/config` - Read config (public key, name, radio params)
-- `PATCH /api/radio/config` - Update name, lat/lon, tx_power, radio params
-- `PUT /api/radio/private-key` - Import private key to radio (write-only)
-- `POST /api/radio/advertise?flood=true` - Send advertisement
-- `POST /api/radio/reboot` - Reboot radio or reconnect if disconnected
-- `POST /api/radio/reconnect` - Manual reconnection attempt
-
-### Contacts
-- `GET /api/contacts` - List from database
-- `GET /api/contacts/{key}` - Get by public key or prefix
-- `POST /api/contacts` - Create contact (optionally trigger historical DM decryption)
-- `POST /api/contacts/sync` - Pull from radio to database
-- `POST /api/contacts/{key}/add-to-radio` - Push to radio
-- `POST /api/contacts/{key}/remove-from-radio` - Remove from radio
-- `POST /api/contacts/{key}/mark-read` - Mark conversation as read (updates last_read_at)
-- `POST /api/contacts/{key}/telemetry` - Request telemetry from repeater (see below)
-
-### Channels
-- `GET /api/channels` - List from database
-- `GET /api/channels/{key}` - Get by channel key
-- `POST /api/channels` - Create (hashtag if name starts with # or no key provided)
-- `POST /api/channels/sync` - Pull from radio
-- `POST /api/channels/{key}/mark-read` - Mark channel as read (updates last_read_at)
-- `DELETE /api/channels/{key}` - Delete channel
-
-### Read State
-- `POST /api/read-state/mark-all-read` - Mark all contacts and channels as read
-
-### Messages
-- `GET /api/messages?type=&conversation_key=&limit=&offset=` - List with filters
-- `POST /api/messages/direct` - Send direct message
-- `POST /api/messages/channel` - Send channel message
-
-### Packets
-- `GET /api/packets/undecrypted/count` - Count of undecrypted packets
-- `POST /api/packets/decrypt/historical` - Try decrypting old packets with new key
-
-### Settings
-- `GET /api/settings` - Get all app settings
-- `PATCH /api/settings` - Update settings (max_radio_contacts, auto_decrypt_dm_on_advert, sidebar_sort_order)
-- `POST /api/settings/favorites` - Add a favorite
-- `DELETE /api/settings/favorites` - Remove a favorite
-- `POST /api/settings/favorites/toggle` - Toggle favorite status
-- `POST /api/settings/last-message-time` - Update last message time for a conversation
-- `POST /api/settings/migrate` - One-time migration from frontend localStorage
-
-### WebSocket
-- `WS /api/ws` - Real-time updates (health, contacts, channels, messages, raw packets)
-
-### Static Files (Production)
-In production, the backend also serves the frontend:
-- `/` - Serves `frontend/dist/index.html`
-- `/assets/*` - Serves compiled JS/CSS from `frontend/dist/assets/`
-- `/*` - Falls back to `index.html` for SPA routing
-
-## Testing
-
-Run tests with:
-```bash
-PYTHONPATH=. uv run pytest tests/ -v
-```
-
-Key test files:
-- `tests/test_decoder.py` - Channel + direct message decryption, key exchange, real-world test vectors
-- `tests/test_keystore.py` - Ephemeral key store operations
-- `tests/test_event_handlers.py` - ACK tracking, repeat detection, CLI response filtering
-- `tests/test_api.py` - API endpoint tests, read state tracking
-- `tests/test_migrations.py` - Migration system, schema versioning
-
-## Common Tasks
-
-### Adding a New Endpoint
-
-1. Create or update router in `app/routers/`
-2. Define Pydantic models in `app/models.py` if needed
-3. Add repository methods in `app/repository.py` for database operations
-4. Register router in `app/main.py` if new file
-5. Add tests in `tests/`
-
-### Adding a New Event Handler
-
-1. Define handler in `app/event_handlers.py`
-2. Register in `register_event_handlers()` function
-3. Broadcast updates via `ws_manager` as needed
-
-### Working with Radio Commands
-
-```python
-# Available via radio_manager.meshcore.commands
-await mc.commands.send_msg(dst, msg)
-await mc.commands.send_chan_msg(chan, msg)
-await mc.commands.get_contacts()
-await mc.commands.add_contact(contact_dict)
-await mc.commands.set_channel(idx, name, key)
-await mc.commands.send_advert(flood=True)
-```
-
-## Repeater Telemetry
-
-The `POST /api/contacts/{key}/telemetry` endpoint fetches status, neighbors, and ACL from repeaters (contact type=2).
-
-### Request Flow
-
-1. Verify contact exists and is a repeater (type=2)
-2. Add contact to radio with stored path data (from advertisements)
-3. Send login with password
-4. Request status with retries (3 attempts, 10s timeout)
-5. Fetch neighbors with `fetch_all_neighbours()` (handles pagination)
-6. Fetch ACL with `req_acl_sync()`
-7. Resolve pubkey prefixes to contact names from database
-
-### ACL Permission Levels
-
-```python
-ACL_PERMISSION_NAMES = {
-    0: "Guest",
-    1: "Read-only",
-    2: "Read-write",
-    3: "Admin",
-}
-```
-
-### Response Models
-
-```python
-class NeighborInfo(BaseModel):
-    pubkey_prefix: str      # 4-12 char prefix
-    name: str | None        # Resolved contact name
-    snr: float              # Signal-to-noise ratio in dB
-    last_heard_seconds: int # Seconds since last heard
-
-class AclEntry(BaseModel):
-    pubkey_prefix: str      # 12 char prefix
-    name: str | None        # Resolved contact name
-    permission: int         # 0-3
-    permission_name: str    # Human-readable name
-
-class TelemetryResponse(BaseModel):
-    # Status fields
-    pubkey_prefix: str
-    battery_volts: float    # Converted from mV
-    uptime_seconds: int
-    # ... signal quality, packet counts, etc.
-
-    # Related data
-    neighbors: list[NeighborInfo]
-    acl: list[AclEntry]
-```
-
-## Repeater CLI Commands
-
-After login via telemetry endpoint, you can send CLI commands to repeaters:
-
-### Endpoint
-
-`POST /api/contacts/{key}/command` - Send a CLI command (assumes already logged in)
-
-### Request/Response
-
-```python
-class CommandRequest(BaseModel):
-    command: str  # CLI command to send
-
-class CommandResponse(BaseModel):
-    command: str           # Echo of sent command
-    response: str          # Response from repeater
-    sender_timestamp: int | None  # Timestamp from response
-```
-
-### Common Commands
-
-```
-get name / set name <value>     # Repeater name
-get tx / set tx <dbm>           # TX power
-get radio / set radio <freq,bw,sf,cr>  # Radio params
-tempradio <freq,bw,sf,cr,mins>  # Temporary radio change
-setperm <pubkey> <0-3>          # ACL: 0=guest, 1=ro, 2=rw, 3=admin
-clock / clock sync              # Get/sync time
-ver                             # Firmware version
-reboot                          # Restart repeater
-```
-
-### CLI Response Filtering
-
-CLI responses have `txt_type=1` (vs `txt_type=0` for normal messages). The event handler
-in `event_handlers.py` skips these to prevent duplicates—the command endpoint returns
-the response directly, so we don't also store/broadcast via WebSocket.
-
-```python
-# In on_contact_message()
-txt_type = payload.get("txt_type", 0)
-if txt_type == 1:
-    return  # Skip CLI responses
-```
-
-### Helper Function
-
-`prepare_repeater_connection()` handles the login dance:
-1. Add contact to radio with stored path from DB (`out_path`, `out_path_len`)
-2. Send login with password
-3. Wait for key exchange to complete
-
-### Contact Path Tracking
-
-When advertisements are received, path data is extracted and stored:
-- `last_path`: Hex string of routing path bytes
-- `last_path_len`: Number of hops (-1=flood/unknown, 0=direct, >0=hops through repeaters)
-
-**Shortest path selection**: When receiving echoed advertisements within 60 seconds, the shortest path is kept. This ensures we use the most efficient route when multiple paths exist.

app/config.py

@@ -1,6 +1,7 @@
 import logging
 from typing import Literal
 
+from pydantic import model_validator
 from pydantic_settings import BaseSettings, SettingsConfigDict
 
 
@@ -9,14 +10,78 @@ class Settings(BaseSettings):
 
     serial_port: str = ""  # Empty string triggers auto-detection
     serial_baudrate: int = 115200
+    tcp_host: str = ""
+    tcp_port: int = 4000
+    ble_address: str = ""
+    ble_pin: str = ""
     log_level: Literal["DEBUG", "INFO", "WARNING", "ERROR"] = "INFO"
     database_path: str = "data/meshcore.db"
-    max_radio_contacts: int = 200  # Max non-repeater contacts to keep on radio for DM ACKs
+    disable_bots: bool = False
+
+    @model_validator(mode="after")
+    def validate_transport_exclusivity(self) -> "Settings":
+        transports_set = sum(
+            [
+                bool(self.serial_port),
+                bool(self.tcp_host),
+                bool(self.ble_address),
+            ]
+        )
+        if transports_set > 1:
+            raise ValueError(
+                "Only one transport may be configured at a time. "
+                "Set exactly one of MESHCORE_SERIAL_PORT, MESHCORE_TCP_HOST, or MESHCORE_BLE_ADDRESS."
+            )
+        if self.ble_address and not self.ble_pin:
+            raise ValueError("MESHCORE_BLE_PIN is required when MESHCORE_BLE_ADDRESS is set.")
+        return self
+
+    @property
+    def connection_type(self) -> Literal["serial", "tcp", "ble"]:
+        if self.tcp_host:
+            return "tcp"
+        if self.ble_address:
+            return "ble"
+        return "serial"
 
 
 settings = Settings()
 
 
+class _RepeatSquelch(logging.Filter):
+    """Suppress rapid-fire identical messages and emit a summary instead.
+
+    Attached to the ``meshcore`` library logger to catch its repeated
+    "Serial Connection started" lines that flood the log when another
+    process holds the serial port.
+    """
+
+    def __init__(self, threshold: int = 3) -> None:
+        super().__init__()
+        self._last_msg: str | None = None
+        self._repeat_count: int = 0
+        self._threshold = threshold
+
+    def filter(self, record: logging.LogRecord) -> bool:
+        msg = record.getMessage()
+        if msg == self._last_msg:
+            self._repeat_count += 1
+            if self._repeat_count == self._threshold:
+                record.msg = (
+                    "%s (repeated %d times — possible serial port contention from another process)"
+                )
+                record.args = (msg, self._repeat_count)
+                record.levelno = logging.WARNING
+                record.levelname = "WARNING"
+                return True
+            # Suppress further repeats beyond the threshold
+            return self._repeat_count < self._threshold
+        else:
+            self._last_msg = msg
+            self._repeat_count = 1
+            return True
+
+
 def setup_logging() -> None:
     """Configure logging for the application."""
     logging.basicConfig(
@@ -24,3 +89,6 @@ def setup_logging() -> None:
         format="%(asctime)s - %(name)s - %(levelname)s - %(message)s",
         datefmt="%Y-%m-%d %H:%M:%S",
     )
+    # Squelch repeated messages from the meshcore library (e.g. rapid-fire
+    # "Serial Connection started" when the port is contended).
+    logging.getLogger("meshcore").addFilter(_RepeatSquelch())

app/database.py

@@ -15,12 +15,14 @@ CREATE TABLE IF NOT EXISTS contacts (
     flags INTEGER DEFAULT 0,
     last_path TEXT,
     last_path_len INTEGER DEFAULT -1,
+    out_path_hash_mode INTEGER DEFAULT 0,
     last_advert INTEGER,
     lat REAL,
     lon REAL,
     last_seen INTEGER,
     on_radio INTEGER DEFAULT 0,
-    last_contacted INTEGER
+    last_contacted INTEGER,
+    first_seen INTEGER
 );
 
 CREATE TABLE IF NOT EXISTS channels (
@@ -42,7 +44,14 @@ CREATE TABLE IF NOT EXISTS messages (
     signature TEXT,
     outgoing INTEGER DEFAULT 0,
     acked INTEGER DEFAULT 0,
-    UNIQUE(type, conversation_key, text, sender_timestamp)
+    sender_name TEXT,
+    sender_key TEXT
+    -- Deduplication: identical text + timestamp in the same conversation is treated as a
+    -- mesh echo/repeat. Second-precision timestamps mean two intentional identical messages
+    -- within the same second would collide, but this is not feasible in practice — LoRa
+    -- transmission takes several seconds per message, and the UI clears the input on send.
+    -- Enforced via idx_messages_dedup_null_safe (unique index) rather than a table constraint
+    -- to avoid the storage overhead of SQLite's autoindex duplicating every message text.
 );
 
 CREATE TABLE IF NOT EXISTS raw_packets (
@@ -50,15 +59,43 @@ CREATE TABLE IF NOT EXISTS raw_packets (
     timestamp INTEGER NOT NULL,
     data BLOB NOT NULL,
     message_id INTEGER,
-    payload_hash TEXT,
+    payload_hash BLOB,
     FOREIGN KEY (message_id) REFERENCES messages(id)
 );
 
-CREATE INDEX IF NOT EXISTS idx_messages_conversation ON messages(type, conversation_key);
+CREATE TABLE IF NOT EXISTS contact_advert_paths (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    public_key TEXT NOT NULL,
+    path_hex TEXT NOT NULL,
+    path_len INTEGER NOT NULL,
+    first_seen INTEGER NOT NULL,
+    last_seen INTEGER NOT NULL,
+    heard_count INTEGER NOT NULL DEFAULT 1,
+    UNIQUE(public_key, path_hex, path_len),
+    FOREIGN KEY (public_key) REFERENCES contacts(public_key)
+);
+
+CREATE TABLE IF NOT EXISTS contact_name_history (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    public_key TEXT NOT NULL,
+    name TEXT NOT NULL,
+    first_seen INTEGER NOT NULL,
+    last_seen INTEGER NOT NULL,
+    UNIQUE(public_key, name),
+    FOREIGN KEY (public_key) REFERENCES contacts(public_key)
+);
+
 CREATE INDEX IF NOT EXISTS idx_messages_received ON messages(received_at);
+CREATE UNIQUE INDEX IF NOT EXISTS idx_messages_dedup_null_safe
+    ON messages(type, conversation_key, text, COALESCE(sender_timestamp, 0));
 CREATE INDEX IF NOT EXISTS idx_raw_packets_message_id ON raw_packets(message_id);
 CREATE UNIQUE INDEX IF NOT EXISTS idx_raw_packets_payload_hash ON raw_packets(payload_hash);
 CREATE INDEX IF NOT EXISTS idx_contacts_on_radio ON contacts(on_radio);
+-- idx_messages_sender_key is created by migration 25 (after adding the sender_key column)
+CREATE INDEX IF NOT EXISTS idx_contact_advert_paths_recent
+    ON contact_advert_paths(public_key, last_seen DESC);
+CREATE INDEX IF NOT EXISTS idx_contact_name_history_key
+    ON contact_name_history(public_key, last_seen DESC);
 """
 
 
@@ -72,6 +109,17 @@ class Database:
         Path(self.db_path).parent.mkdir(parents=True, exist_ok=True)
         self._connection = await aiosqlite.connect(self.db_path)
         self._connection.row_factory = aiosqlite.Row
+
+        # WAL mode: faster writes, concurrent readers during writes, no journal file churn.
+        # Persists in the DB file but we set it explicitly on every connection.
+        await self._connection.execute("PRAGMA journal_mode = WAL")
+
+        # Incremental auto-vacuum: freed pages are reclaimable via
+        # PRAGMA incremental_vacuum without a full VACUUM. Must be set before
+        # the first table is created (for new databases); for existing databases
+        # migration 20 handles the one-time VACUUM to restructure the file.
+        await self._connection.execute("PRAGMA auto_vacuum = INCREMENTAL")
+
         await self._connection.executescript(SCHEMA)
         await self._connection.commit()
         logger.debug("Database schema initialized")

app/decoder.py

@@ -79,9 +79,10 @@ class PacketInfo:
     route_type: RouteType
     payload_type: PayloadType
     payload_version: int
-    path_length: int
-    path: bytes  # The routing path (empty if path_length is 0)
+    path_length: int  # Decoded hop count (not the raw wire byte)
+    path: bytes  # The routing path bytes (empty if path_length is 0)
     payload: bytes
+    path_hash_size: int = 1  # Bytes per hop: 1, 2, or 3
 
 
 def calculate_channel_hash(channel_key: bytes) -> str:
@@ -100,86 +101,36 @@ def extract_payload(raw_packet: bytes) -> bytes | None:
     Packet structure:
     - Byte 0: header (route_type, payload_type, version)
     - For TRANSPORT routes: bytes 1-4 are transport codes
-    - Next byte: path_length
-    - Next path_length bytes: path data
+    - Next byte: path byte (packed as [hash_mode:2][hop_count:6])
+    - Next hop_count * hash_size bytes: path data
     - Remaining: payload
 
     Returns the payload bytes, or None if packet is malformed.
     """
-    if len(raw_packet) < 2:
-        return None
+    from app.path_utils import parse_packet_envelope
 
-    try:
-        header = raw_packet[0]
-        route_type = header & 0x03
-        offset = 1
-
-        # Skip transport codes if present (TRANSPORT_FLOOD=0, TRANSPORT_DIRECT=3)
-        if route_type in (0x00, 0x03):
-            if len(raw_packet) < offset + 4:
-                return None
-            offset += 4
-
-        # Get path length
-        if len(raw_packet) < offset + 1:
-            return None
-        path_length = raw_packet[offset]
-        offset += 1
-
-        # Skip path data
-        if len(raw_packet) < offset + path_length:
-            return None
-        offset += path_length
-
-        # Rest is payload
-        return raw_packet[offset:]
-    except (ValueError, IndexError):
-        return None
+    envelope = parse_packet_envelope(raw_packet)
+    return envelope.payload if envelope is not None else None
 
 
 def parse_packet(raw_packet: bytes) -> PacketInfo | None:
     """Parse a raw packet and extract basic info."""
-    if len(raw_packet) < 2:
+    from app.path_utils import parse_packet_envelope
+
+    envelope = parse_packet_envelope(raw_packet)
+    if envelope is None:
         return None
-
     try:
-        header = raw_packet[0]
-        route_type = RouteType(header & 0x03)
-        payload_type = PayloadType((header >> 2) & 0x0F)
-        payload_version = (header >> 6) & 0x03
-
-        offset = 1
-
-        # Skip transport codes if present
-        if route_type in (RouteType.TRANSPORT_FLOOD, RouteType.TRANSPORT_DIRECT):
-            if len(raw_packet) < offset + 4:
-                return None
-            offset += 4
-
-        # Get path length
-        if len(raw_packet) < offset + 1:
-            return None
-        path_length = raw_packet[offset]
-        offset += 1
-
-        # Extract path data
-        if len(raw_packet) < offset + path_length:
-            return None
-        path = raw_packet[offset : offset + path_length]
-        offset += path_length
-
-        # Rest is payload
-        payload = raw_packet[offset:]
-
         return PacketInfo(
-            route_type=route_type,
-            payload_type=payload_type,
-            payload_version=payload_version,
-            path_length=path_length,
-            path=path,
-            payload=payload,
+            route_type=RouteType(envelope.route_type),
+            payload_type=PayloadType(envelope.payload_type),
+            payload_version=envelope.payload_version,
+            path_length=envelope.hop_count,
+            path_hash_size=envelope.hash_size,
+            path=envelope.path,
+            payload=envelope.payload,
         )
-    except (ValueError, IndexError):
+    except ValueError:
         return None
 
 
@@ -327,7 +278,6 @@ def parse_advertisement(payload: bytes) -> ParsedAdvertisement | None:
     # Parse fixed-position fields
     public_key = payload[0:32].hex()
     timestamp = int.from_bytes(payload[32:36], byteorder="little")
-    # signature = payload[36:100]  # Not currently verified
     flags = payload[100]
 
     # Parse flags
@@ -393,21 +343,6 @@ def parse_advertisement(payload: bytes) -> ParsedAdvertisement | None:
     )
 
 
-def try_parse_advertisement(raw_packet: bytes) -> ParsedAdvertisement | None:
-    """
-    Try to parse a raw packet as an advertisement.
-    Returns parsed advertisement if successful, None otherwise.
-    """
-    packet_info = parse_packet(raw_packet)
-    if packet_info is None:
-        return None
-
-    if packet_info.payload_type != PayloadType.ADVERT:
-        return None
-
-    return parse_advertisement(packet_info.payload)
-
-
 # =============================================================================
 # Direct Message (TEXT_MESSAGE) Decryption
 # =============================================================================
@@ -545,8 +480,10 @@ def decrypt_direct_message(payload: bytes, shared_secret: bytes) -> DecryptedDir
     message_bytes = decrypted[5:]
     try:
         message_text = message_bytes.decode("utf-8")
-        # Remove null terminator and any padding
-        message_text = message_text.rstrip("\x00")
+        # Truncate at first null terminator (consistent with channel message handling)
+        null_idx = message_text.find("\x00")
+        if null_idx >= 0:
+            message_text = message_text[:null_idx]
     except UnicodeDecodeError:
         return None
 

app/dependencies.py

@@ -10,6 +10,8 @@ def require_connected():
 
     Raises HTTPException 503 if radio is not connected.
     """
+    if getattr(radio_manager, "is_setup_in_progress", False) is True:
+        raise HTTPException(status_code=503, detail="Radio is initializing")
     if not radio_manager.is_connected or radio_manager.meshcore is None:
         raise HTTPException(status_code=503, detail="Radio not connected")
     return radio_manager.meshcore

app/event_handlers.py

@@ -4,9 +4,14 @@ from typing import TYPE_CHECKING
 
 from meshcore import EventType
 
-from app.models import Contact
+from app.models import CONTACT_TYPE_REPEATER, Contact, Message, MessagePath
 from app.packet_processor import process_raw_packet
-from app.repository import ContactRepository, MessageRepository
+from app.repository import (
+    AmbiguousPublicKeyPrefixError,
+    ContactNameHistoryRepository,
+    ContactRepository,
+    MessageRepository,
+)
 from app.websocket import broadcast_event
 
 if TYPE_CHECKING:
@@ -34,7 +39,7 @@ def track_pending_ack(expected_ack: str, message_id: int, timeout_ms: int) -> No
     )
 
 
-def _cleanup_expired_acks() -> None:
+def cleanup_expired_acks() -> None:
     """Remove expired pending ACKs."""
     now = time.time()
     expired = []
@@ -47,76 +52,113 @@ def _cleanup_expired_acks() -> None:
 
 
 async def on_contact_message(event: "Event") -> None:
-    """Handle incoming direct messages.
+    """Handle incoming direct messages from MeshCore library.
 
-    Direct messages are decrypted by MeshCore library using ECDH key exchange.
-    The packet processor cannot decrypt these without the node's private key.
+    NOTE: DMs are primarily handled by the packet processor via RX_LOG_DATA,
+    which decrypts using our exported private key. This handler exists as a
+    fallback for cases where:
+    1. The private key couldn't be exported (firmware without ENABLE_PRIVATE_KEY_EXPORT)
+    2. The packet processor couldn't match the sender to a known contact
+
+    The packet processor handles: decryption, storage, broadcast, bot trigger.
+    This handler only stores if the packet processor didn't already handle it
+    (detected via INSERT OR IGNORE returning None for duplicates).
     """
     payload = event.payload
 
     # Skip CLI command responses (txt_type=1) - these are handled by the command endpoint
-    # and should not be stored in the database or broadcast via WebSocket
     txt_type = payload.get("txt_type", 0)
     if txt_type == 1:
         logger.debug("Skipping CLI response from %s (txt_type=1)", payload.get("pubkey_prefix"))
         return
 
-    logger.debug("Received direct message from %s", payload.get("pubkey_prefix"))
-
     # Get full public key if available, otherwise use prefix
     sender_pubkey = payload.get("public_key") or payload.get("pubkey_prefix", "")
     received_at = int(time.time())
 
-    # Look up full public key from contact database if we only have prefix
-    if len(sender_pubkey) < 64:
-        contact = await ContactRepository.get_by_key_prefix(sender_pubkey)
-        if contact:
-            sender_pubkey = contact.public_key
+    # Look up contact from database - use prefix lookup only if needed
+    # (get_by_key_or_prefix does exact match first, then prefix fallback)
+    try:
+        contact = await ContactRepository.get_by_key_or_prefix(sender_pubkey)
+    except AmbiguousPublicKeyPrefixError:
+        logger.warning(
+            "DM sender prefix '%s' is ambiguous; storing under prefix until full key is known",
+            sender_pubkey,
+        )
+        contact = None
+    if contact:
+        sender_pubkey = contact.public_key.lower()
+
+        # Promote any prefix-stored messages to this full key
+        await MessageRepository.claim_prefix_messages(sender_pubkey)
+
+        # Skip messages from repeaters - they only send CLI responses, not chat messages.
+        # CLI responses are handled by the command endpoint and txt_type filter above.
+        if contact.type == CONTACT_TYPE_REPEATER:
+            logger.debug(
+                "Skipping message from repeater %s (not stored in chat history)",
+                sender_pubkey[:12],
+            )
+            return
 
     # Try to create message - INSERT OR IGNORE handles duplicates atomically
+    # If the packet processor already stored this message, this returns None
+    ts = payload.get("sender_timestamp")
+    sender_timestamp = ts if ts is not None else received_at
+    sender_name = contact.name if contact else None
+    path = payload.get("path")
+    path_len = payload.get("path_len")
     msg_id = await MessageRepository.create(
         msg_type="PRIV",
         text=payload.get("text", ""),
         conversation_key=sender_pubkey,
-        sender_timestamp=payload.get("sender_timestamp"),
+        sender_timestamp=sender_timestamp,
         received_at=received_at,
-        path=payload.get("path"),
-        txt_type=payload.get("txt_type", 0),
+        path=path,
+        path_len=path_len,
+        txt_type=txt_type,
         signature=payload.get("signature"),
+        sender_key=sender_pubkey,
+        sender_name=sender_name,
     )
 
     if msg_id is None:
-        # Duplicate message (same content from same sender) - skip broadcast
-        logger.debug("Duplicate direct message from %s ignored", sender_pubkey[:12])
+        # Already handled by packet processor (or exact duplicate) - nothing more to do
+        logger.debug("DM from %s already processed by packet processor", sender_pubkey[:12])
         return
 
-    # Build paths array for broadcast
-    # Use "is not None" to include empty string (direct/0-hop messages)
-    path = payload.get("path")
-    paths = [{"path": path or "", "received_at": received_at}] if path is not None else None
+    # If we get here, the packet processor didn't handle this message
+    # (likely because private key export is not available)
+    logger.debug("DM from %s handled by event handler (fallback path)", sender_pubkey[:12])
 
-    # Broadcast only genuinely new messages
-    broadcast_event(
-        "message",
-        {
-            "id": msg_id,
-            "type": "PRIV",
-            "conversation_key": sender_pubkey,
-            "text": payload.get("text", ""),
-            "sender_timestamp": payload.get("sender_timestamp"),
-            "received_at": received_at,
-            "paths": paths,
-            "txt_type": payload.get("txt_type", 0),
-            "signature": payload.get("signature"),
-            "outgoing": False,
-            "acked": 0,
-        },
+    # Build paths array for broadcast
+    paths = (
+        [MessagePath(path=path or "", received_at=received_at, path_len=path_len)]
+        if path is not None
+        else None
     )
 
-    # Update contact last_seen and last_contacted
-    contact = await ContactRepository.get_by_key_prefix(sender_pubkey)
+    # Broadcast the new message
+    broadcast_event(
+        "message",
+        Message(
+            id=msg_id,
+            type="PRIV",
+            conversation_key=sender_pubkey,
+            text=payload.get("text", ""),
+            sender_timestamp=sender_timestamp,
+            received_at=received_at,
+            paths=paths,
+            txt_type=txt_type,
+            signature=payload.get("signature"),
+            sender_key=sender_pubkey,
+            sender_name=sender_name,
+        ).model_dump(),
+    )
+
+    # Update contact last_contacted (contact was already fetched above)
     if contact:
-        await ContactRepository.update_last_contacted(contact.public_key, received_at)
+        await ContactRepository.update_last_contacted(sender_pubkey, received_at)
 
 
 async def on_rx_log_data(event: "Event") -> None:
@@ -145,15 +187,67 @@ async def on_rx_log_data(event: "Event") -> None:
 async def on_path_update(event: "Event") -> None:
     """Handle path update events."""
     payload = event.payload
-    logger.debug("Path update for %s", payload.get("pubkey_prefix"))
+    public_key = str(payload.get("public_key", "")).lower()
+    pubkey_prefix = str(payload.get("pubkey_prefix", "")).lower()
 
-    pubkey_prefix = payload.get("pubkey_prefix", "")
-    path = payload.get("path", "")
-    path_len = payload.get("path_len", -1)
+    contact: Contact | None = None
+    if public_key:
+        logger.debug("Path update for %s", public_key[:12])
+        contact = await ContactRepository.get_by_key(public_key)
+    elif pubkey_prefix:
+        # Legacy compatibility: older payloads may only include a prefix.
+        logger.debug("Path update for prefix %s", pubkey_prefix)
+        contact = await ContactRepository.get_by_key_prefix(pubkey_prefix)
+    else:
+        logger.debug("PATH_UPDATE missing public_key/pubkey_prefix, skipping")
+        return
 
-    existing = await ContactRepository.get_by_key_prefix(pubkey_prefix)
-    if existing:
-        await ContactRepository.update_path(existing.public_key, path, path_len)
+    if not contact:
+        return
+
+    # PATH_UPDATE is a serial control push event from firmware (not an RF packet).
+    # Current meshcore payloads only include public_key for this event.
+    # RF route/path bytes are handled via RX_LOG_DATA -> process_raw_packet,
+    # so if path fields are absent here we treat this as informational only.
+    path = payload.get("path")
+    path_len = payload.get("path_len")
+    path_hash_mode = payload.get("path_hash_mode")
+    if path is None or path_len is None:
+        logger.debug(
+            "PATH_UPDATE for %s has no path payload, skipping DB update", contact.public_key[:12]
+        )
+        return
+
+    try:
+        normalized_path_len = int(path_len)
+    except (TypeError, ValueError):
+        logger.warning(
+            "Invalid path_len in PATH_UPDATE for %s: %r", contact.public_key[:12], path_len
+        )
+        return
+
+    normalized_path_hash_mode: int | None
+    if path_hash_mode is None:
+        # Legacy firmware/library payloads only support 1-byte hop hashes.
+        normalized_path_hash_mode = -1 if normalized_path_len == -1 else 0
+    else:
+        normalized_path_hash_mode = None
+        try:
+            normalized_path_hash_mode = int(path_hash_mode)
+        except (TypeError, ValueError):
+            logger.warning(
+                "Invalid path_hash_mode in PATH_UPDATE for %s: %r",
+                contact.public_key[:12],
+                path_hash_mode,
+            )
+            normalized_path_hash_mode = None
+
+    await ContactRepository.update_path(
+        contact.public_key,
+        str(path),
+        normalized_path_len,
+        normalized_path_hash_mode,
+    )
 
 
 async def on_new_contact(event: "Event") -> None:
@@ -172,12 +266,29 @@ async def on_new_contact(event: "Event") -> None:
     logger.debug("New contact: %s", public_key[:12])
 
     contact_data = {
-        **Contact.from_radio_dict(public_key, payload, on_radio=True),
+        **Contact.from_radio_dict(public_key.lower(), payload, on_radio=True),
         "last_seen": int(time.time()),
     }
     await ContactRepository.upsert(contact_data)
 
-    broadcast_event("contact", contact_data)
+    # Record name history if contact has a name
+    adv_name = payload.get("adv_name")
+    if adv_name:
+        await ContactNameHistoryRepository.record_name(
+            public_key.lower(), adv_name, int(time.time())
+        )
+        backfilled = await MessageRepository.backfill_channel_sender_key(public_key, adv_name)
+        if backfilled > 0:
+            logger.info(
+                "Backfilled sender_key on %d channel message(s) for %s",
+                backfilled,
+                adv_name,
+            )
+
+    # Read back from DB so the broadcast includes all fields (last_contacted,
+    # last_read_at, etc.) matching the REST Contact shape exactly.
+    db_contact = await ContactRepository.get_by_key(public_key)
+    broadcast_event("contact", (db_contact.model_dump() if db_contact else contact_data))
 
 
 async def on_ack(event: "Event") -> None:
@@ -191,13 +302,16 @@ async def on_ack(event: "Event") -> None:
 
     logger.debug("Received ACK with code %s", ack_code)
 
-    _cleanup_expired_acks()
+    cleanup_expired_acks()
 
     if ack_code in _pending_acks:
         message_id, _, _ = _pending_acks.pop(ack_code)
         logger.info("ACK received for message %d", message_id)
 
         ack_count = await MessageRepository.increment_ack_count(message_id)
+        # DM ACKs don't carry path data, so paths is intentionally omitted.
+        # The frontend's mergePendingAck handles the missing field correctly,
+        # preserving any previously known paths.
         broadcast_event("message_acked", {"message_id": message_id, "ack_count": ack_count})
     else:
         logger.debug("ACK code %s does not match any pending messages", ack_code)

app/fanout/AGENTS_fanout.md

@@ -0,0 +1,286 @@
+# Fanout Bus Architecture
+
+The fanout bus is a unified system for dispatching mesh radio events (decoded messages and raw packets) to external integrations. It replaces the previous scattered singleton MQTT publishers with a modular, configurable framework.
+
+## Core Concepts
+
+### FanoutModule (base.py)
+Base class that all integration modules extend:
+- `__init__(config_id, config, *, name="")` — constructor; receives the config UUID, the type-specific config dict, and the user-assigned name
+- `start()` / `stop()` — async lifecycle (e.g. open/close connections)
+- `on_message(data)` — receive decoded messages (DM/channel)
+- `on_raw(data)` — receive raw RF packets
+- `status` property (**must override**) — return `"connected"`, `"disconnected"`, or `"error"`
+
+### FanoutManager (manager.py)
+Singleton that owns all active modules and dispatches events:
+- `load_from_db()` — startup: load enabled configs, instantiate modules
+- `reload_config(id)` — CRUD: stop old, start new
+- `remove_config(id)` — delete: stop and remove
+- `broadcast_message(data)` — scope-check + dispatch `on_message`
+- `broadcast_raw(data)` — scope-check + dispatch `on_raw`
+- `stop_all()` — shutdown
+- `get_statuses()` — health endpoint data
+
+All modules are constructed uniformly: `cls(config_id, config_blob, name=cfg.get("name", ""))`.
+
+### Scope Matching
+Each config has a `scope` JSON blob controlling what events reach it:
+```json
+{"messages": "all", "raw_packets": "all"}
+{"messages": "none", "raw_packets": "all"}
+{"messages": {"channels": ["key1"], "contacts": "all"}, "raw_packets": "none"}
+```
+Community MQTT always enforces `{"messages": "none", "raw_packets": "all"}`.
+
+## Event Flow
+
+```
+Radio Event -> packet_processor / event_handler
+  -> broadcast_event("message"|"raw_packet", data, realtime=True)
+    -> WebSocket broadcast (always)
+    -> FanoutManager.broadcast_message/raw (only if realtime=True)
+      -> scope check per module
+      -> module.on_message / on_raw
+```
+
+Setting `realtime=False` (used during historical decryption) skips fanout dispatch entirely.
+
+## Current Module Types
+
+### mqtt_private (mqtt_private.py)
+Wraps `MqttPublisher` from `app/fanout/mqtt.py`. Config blob:
+- `broker_host`, `broker_port`, `username`, `password`
+- `use_tls`, `tls_insecure`, `topic_prefix`
+
+### mqtt_community (mqtt_community.py)
+Wraps `CommunityMqttPublisher` from `app/fanout/community_mqtt.py`. Config blob:
+- `broker_host`, `broker_port`, `iata`, `email`
+- Only publishes raw packets (on_message is a no-op)
+- The published `raw` field is always the original packet hex.
+- When a direct packet includes a `path` field, it is emitted as comma-separated hop identifiers exactly as the packet reports them. Token width varies with the packet's path hash mode (`1`, `2`, or `3` bytes per hop); there is no legacy flat per-byte companion field.
+
+### bot (bot.py)
+Wraps bot code execution via `app/fanout/bot_exec.py`. Config blob:
+- `code` — Python bot function source code
+- Executes in a thread pool with timeout and semaphore concurrency control
+- Rate-limits outgoing messages for repeater compatibility
+
+### webhook (webhook.py)
+HTTP webhook delivery. Config blob:
+- `url`, `method` (POST/PUT/PATCH)
+- `hmac_secret` (optional) — when set, each request includes an HMAC-SHA256 signature of the JSON body
+- `hmac_header` (optional, default `X-Webhook-Signature`) — header name for the signature (value format: `sha256=<hex>`)
+- `headers` — arbitrary extra headers (JSON object)
+
+### apprise (apprise_mod.py)
+Push notifications via Apprise library. Config blob:
+- `urls` — newline-separated Apprise notification service URLs
+- `preserve_identity` — suppress Discord webhook name/avatar override
+- `include_path` — include routing path in notification body
+
+## Adding a New Integration Type
+
+### Step-by-step checklist
+
+#### 1. Backend module (`app/fanout/my_type.py`)
+
+Create a class extending `FanoutModule`:
+
+```python
+from app.fanout.base import FanoutModule
+
+class MyTypeModule(FanoutModule):
+    def __init__(self, config_id: str, config: dict, *, name: str = "") -> None:
+        super().__init__(config_id, config, name=name)
+        # Initialize module-specific state
+
+    async def start(self) -> None:
+        """Open connections, create clients, etc."""
+
+    async def stop(self) -> None:
+        """Close connections, clean up resources."""
+
+    async def on_message(self, data: dict) -> None:
+        """Handle decoded messages. Omit if not needed."""
+
+    async def on_raw(self, data: dict) -> None:
+        """Handle raw packets. Omit if not needed."""
+
+    @property
+    def status(self) -> str:
+        """Required. Return 'connected', 'disconnected', or 'error'."""
+        ...
+```
+
+Constructor requirements:
+- Must accept `config_id: str, config: dict, *, name: str = ""`
+- Must forward `name` to super: `super().__init__(config_id, config, name=name)`
+
+#### 2. Register in manager (`app/fanout/manager.py`)
+
+Add import and mapping in `_register_module_types()`:
+
+```python
+from app.fanout.my_type import MyTypeModule
+_MODULE_TYPES["my_type"] = MyTypeModule
+```
+
+#### 3. Router changes (`app/routers/fanout.py`)
+
+Three changes needed:
+
+**a)** Add to `_VALID_TYPES` set:
+```python
+_VALID_TYPES = {"mqtt_private", "mqtt_community", "bot", "webhook", "apprise", "my_type"}
+```
+
+**b)** Add a validation function:
+```python
+def _validate_my_type_config(config: dict) -> None:
+    """Validate my_type config blob."""
+    if not config.get("some_required_field"):
+        raise HTTPException(status_code=400, detail="some_required_field is required")
+```
+
+**c)** Wire validation into both `create_fanout_config` and `update_fanout_config` — add an `elif` to the validation block in each:
+```python
+elif body.type == "my_type":
+    _validate_my_type_config(body.config)
+```
+Note: validation only runs when the config will be enabled (disabled configs are treated as drafts).
+
+**d)** Add scope enforcement in `_enforce_scope()` if the type has fixed scope constraints (e.g. raw_packets always none). Otherwise it falls through to the `mqtt_private` default which allows both messages and raw_packets to be configurable.
+
+#### 4. Frontend editor component (`SettingsFanoutSection.tsx`)
+
+Four changes needed in this single file:
+
+**a)** Add to `TYPE_LABELS` and `TYPE_OPTIONS` at the top:
+```tsx
+const TYPE_LABELS: Record<string, string> = {
+  // ... existing entries ...
+  my_type: 'My Type',
+};
+
+const TYPE_OPTIONS = [
+  // ... existing entries ...
+  { value: 'my_type', label: 'My Type' },
+];
+```
+
+**b)** Create an editor component (follows the same pattern as existing editors):
+```tsx
+function MyTypeConfigEditor({
+  config,
+  scope,
+  onChange,
+  onScopeChange,
+}: {
+  config: Record<string, unknown>;
+  scope: Record<string, unknown>;
+  onChange: (config: Record<string, unknown>) => void;
+  onScopeChange: (scope: Record<string, unknown>) => void;
+}) {
+  return (
+    <div className="space-y-3">
+      {/* Type-specific config fields */}
+      <Separator />
+      <ScopeSelector scope={scope} onChange={onScopeChange} />
+    </div>
+  );
+}
+```
+
+If your type does NOT have user-configurable scope (like bot or community MQTT), omit the `scope`/`onScopeChange` props and the `ScopeSelector`.
+
+The `ScopeSelector` component is defined within the same file. It accepts an optional `showRawPackets` prop:
+- **Without `showRawPackets`** (webhook, apprise): shows message scope only (all/only/except — no "none" option since that would make the integration a no-op). A warning appears when the effective selection matches nothing.
+- **With `showRawPackets`** (private MQTT): adds a "Forward raw packets" toggle and includes the "No messages" option (valid when raw packets are enabled). The warning appears only when both raw packets and messages are effectively disabled.
+
+**c)** Add default config and scope in `handleAddCreate`:
+```tsx
+const defaults: Record<string, Record<string, unknown>> = {
+  // ... existing entries ...
+  my_type: { some_field: '', other_field: true },
+};
+const defaultScopes: Record<string, Record<string, unknown>> = {
+  // ... existing entries ...
+  my_type: { messages: 'all', raw_packets: 'none' },
+};
+```
+
+**d)** Wire the editor into the detail view's conditional render block:
+```tsx
+{editingConfig.type === 'my_type' && (
+  <MyTypeConfigEditor
+    config={editConfig}
+    scope={editScope}
+    onChange={setEditConfig}
+    onScopeChange={setEditScope}
+  />
+)}
+```
+
+#### 5. Tests
+
+**Backend integration tests** (`tests/test_fanout_integration.py`):
+- Test that a configured + enabled module receives messages via `FanoutManager.broadcast_message`
+- Test scope filtering (all, none, selective)
+- Test that a disabled module does not receive messages
+
+**Backend unit tests** (`tests/test_fanout_hitlist.py` or a dedicated file):
+- Test config validation (required fields, bad values)
+- Test module-specific logic in isolation
+
+**Frontend tests** (`frontend/src/test/fanoutSection.test.tsx`):
+- The existing suite covers the list/edit/create flow generically. If your editor has special behavior, add specific test cases.
+
+#### Summary of files to touch
+
+| File | Change |
+|------|--------|
+| `app/fanout/my_type.py` | New module class |
+| `app/fanout/manager.py` | Import + register in `_register_module_types()` |
+| `app/routers/fanout.py` | `_VALID_TYPES` + validator function + scope enforcement |
+| `frontend/.../SettingsFanoutSection.tsx` | `TYPE_LABELS` + `TYPE_OPTIONS` + editor component + defaults + detail view wiring |
+| `tests/test_fanout_integration.py` | Integration tests |
+
+## REST API
+
+| Method | Endpoint | Description |
+|--------|----------|-------------|
+| GET | `/api/fanout` | List all fanout configs |
+| POST | `/api/fanout` | Create new config |
+| PATCH | `/api/fanout/{id}` | Update config (triggers module reload) |
+| DELETE | `/api/fanout/{id}` | Delete config (stops module) |
+
+## Database
+
+`fanout_configs` table:
+- `id` TEXT PRIMARY KEY
+- `type`, `name`, `enabled`, `config` (JSON), `scope` (JSON)
+- `sort_order`, `created_at`
+
+Migrations:
+- **36**: Creates `fanout_configs` table, migrates existing MQTT settings from `app_settings`
+- **37**: Migrates bot configs from `app_settings.bots` JSON column into fanout rows
+- **38**: Drops legacy `mqtt_*`, `community_mqtt_*`, and `bots` columns from `app_settings`
+
+## Key Files
+
+- `app/fanout/base.py` — FanoutModule base class
+- `app/fanout/manager.py` — FanoutManager singleton
+- `app/fanout/mqtt_base.py` — BaseMqttPublisher ABC (shared MQTT connection loop)
+- `app/fanout/mqtt.py` — MqttPublisher (private MQTT publishing)
+- `app/fanout/community_mqtt.py` — CommunityMqttPublisher (community MQTT with JWT auth)
+- `app/fanout/mqtt_private.py` — Private MQTT fanout module
+- `app/fanout/mqtt_community.py` — Community MQTT fanout module
+- `app/fanout/bot.py` — Bot fanout module
+- `app/fanout/bot_exec.py` — Bot code execution, response processing, rate limiting
+- `app/fanout/webhook.py` — Webhook fanout module
+- `app/fanout/apprise_mod.py` — Apprise fanout module
+- `app/repository/fanout.py` — Database CRUD
+- `app/routers/fanout.py` — REST API
+- `app/websocket.py` — `broadcast_event()` dispatches to fanout
+- `frontend/src/components/settings/SettingsFanoutSection.tsx` — UI

app/fanout/__init__.py

@@ -0,0 +1,8 @@
+from app.fanout.base import FanoutModule
+from app.fanout.manager import FanoutManager, fanout_manager
+
+__all__ = [
+    "FanoutManager",
+    "FanoutModule",
+    "fanout_manager",
+]

app/fanout/apprise_mod.py

@@ -0,0 +1,130 @@
+"""Fanout module for Apprise push notifications."""
+
+from __future__ import annotations
+
+import asyncio
+import logging
+from urllib.parse import parse_qsl, urlencode, urlsplit, urlunsplit
+
+from app.fanout.base import FanoutModule
+from app.path_utils import split_path_hex
+
+logger = logging.getLogger(__name__)
+
+
+def _parse_urls(raw: str) -> list[str]:
+    """Split multi-line URL string into individual URLs."""
+    return [line.strip() for line in raw.splitlines() if line.strip()]
+
+
+def _normalize_discord_url(url: str) -> str:
+    """Add avatar=no to Discord URLs to suppress identity override."""
+    parts = urlsplit(url)
+    scheme = parts.scheme.lower()
+    host = parts.netloc.lower()
+
+    is_discord = scheme in ("discord", "discords") or (
+        scheme in ("http", "https")
+        and host in ("discord.com", "discordapp.com")
+        and parts.path.lower().startswith("/api/webhooks/")
+    )
+    if not is_discord:
+        return url
+
+    query = dict(parse_qsl(parts.query, keep_blank_values=True))
+    query["avatar"] = "no"
+    return urlunsplit((parts.scheme, parts.netloc, parts.path, urlencode(query), parts.fragment))
+
+
+def _format_body(data: dict, *, include_path: bool) -> str:
+    """Build a human-readable notification body from message data."""
+    msg_type = data.get("type", "")
+    text = data.get("text", "")
+    sender_name = data.get("sender_name") or "Unknown"
+
+    via = ""
+    if include_path:
+        paths = data.get("paths")
+        if paths and isinstance(paths, list) and len(paths) > 0:
+            first_path = paths[0] if isinstance(paths[0], dict) else {}
+            path_str = first_path.get("path", "")
+            path_len = first_path.get("path_len")
+        else:
+            path_str = None
+            path_len = None
+
+        if msg_type == "PRIV" and path_str is None:
+            via = " **via:** [`direct`]"
+        elif path_str is not None:
+            path_str = path_str.strip().lower()
+            if path_str == "":
+                via = " **via:** [`direct`]"
+            else:
+                hop_count = path_len if isinstance(path_len, int) else len(path_str) // 2
+                hops = split_path_hex(path_str, hop_count)
+                if hops:
+                    hop_list = ", ".join(f"`{h}`" for h in hops)
+                    via = f" **via:** [{hop_list}]"
+
+    if msg_type == "PRIV":
+        return f"**DM:** {sender_name}: {text}{via}"
+
+    channel_name = data.get("channel_name") or data.get("conversation_key", "channel")
+    return f"**{channel_name}:** {sender_name}: {text}{via}"
+
+
+def _send_sync(urls_raw: str, body: str, *, preserve_identity: bool) -> bool:
+    """Send notification synchronously via Apprise. Returns True on success."""
+    import apprise as apprise_lib
+
+    urls = _parse_urls(urls_raw)
+    if not urls:
+        return False
+
+    notifier = apprise_lib.Apprise()
+    for url in urls:
+        if preserve_identity:
+            url = _normalize_discord_url(url)
+        notifier.add(url)
+
+    return bool(notifier.notify(title="", body=body))
+
+
+class AppriseModule(FanoutModule):
+    """Sends push notifications via Apprise for incoming messages."""
+
+    def __init__(self, config_id: str, config: dict, *, name: str = "") -> None:
+        super().__init__(config_id, config, name=name)
+        self._last_error: str | None = None
+
+    async def on_message(self, data: dict) -> None:
+        # Skip outgoing messages — only notify on incoming
+        if data.get("outgoing"):
+            return
+
+        urls = self.config.get("urls", "")
+        if not urls or not urls.strip():
+            return
+
+        preserve_identity = self.config.get("preserve_identity", True)
+        include_path = self.config.get("include_path", True)
+        body = _format_body(data, include_path=include_path)
+
+        try:
+            success = await asyncio.to_thread(
+                _send_sync, urls, body, preserve_identity=preserve_identity
+            )
+            self._last_error = None if success else "Apprise notify returned failure"
+            if not success:
+                logger.warning("Apprise notification failed for module %s", self.config_id)
+        except Exception as exc:
+            self._last_error = str(exc)
+            logger.exception("Apprise send error for module %s", self.config_id)
+
+    @property
+    def status(self) -> str:
+        if not self.config.get("urls", "").strip():
+            return "disconnected"
+        if self._last_error:
+            return "error"
+        return "connected"

app/fanout/base.py

@@ -0,0 +1,35 @@
+"""Base class for fanout integration modules."""
+
+from __future__ import annotations
+
+
+class FanoutModule:
+    """Base class for all fanout integrations.
+
+    Each module wraps a specific integration (MQTT, webhook, etc.) and
+    receives dispatched messages/packets from the FanoutManager.
+
+    Subclasses must override the ``status`` property.
+    """
+
+    def __init__(self, config_id: str, config: dict, *, name: str = "") -> None:
+        self.config_id = config_id
+        self.config = config
+        self.name = name
+
+    async def start(self) -> None:
+        """Start the module (e.g. connect to broker). Override for persistent connections."""
+
+    async def stop(self) -> None:
+        """Stop the module (e.g. disconnect from broker)."""
+
+    async def on_message(self, data: dict) -> None:
+        """Called for decoded messages (DM/channel). Override if needed."""
+
+    async def on_raw(self, data: dict) -> None:
+        """Called for raw RF packets. Override if needed."""
+
+    @property
+    def status(self) -> str:
+        """Return 'connected', 'disconnected', or 'error'."""
+        raise NotImplementedError

app/fanout/bot.py

@@ -0,0 +1,142 @@
+"""Fanout module wrapping bot execution logic."""
+
+from __future__ import annotations
+
+import asyncio
+import logging
+
+from app.fanout.base import FanoutModule
+
+logger = logging.getLogger(__name__)
+
+
+class BotModule(FanoutModule):
+    """Wraps a single bot's code execution and response routing.
+
+    Each BotModule represents one bot configuration. It receives decoded
+    messages via ``on_message``, executes the bot's Python code in a
+    background task (after a 2-second settle delay), and sends any response
+    back through the radio.
+    """
+
+    def __init__(self, config_id: str, config: dict, *, name: str = "Bot") -> None:
+        super().__init__(config_id, config, name=name)
+        self._tasks: set[asyncio.Task] = set()
+        self._active = True
+
+    async def stop(self) -> None:
+        self._active = False
+        for task in self._tasks:
+            task.cancel()
+        # Wait briefly for tasks to acknowledge cancellation
+        if self._tasks:
+            await asyncio.gather(*self._tasks, return_exceptions=True)
+        self._tasks.clear()
+
+    async def on_message(self, data: dict) -> None:
+        """Kick off bot execution in a background task so we don't block dispatch."""
+        task = asyncio.create_task(self._run_for_message(data))
+        self._tasks.add(task)
+        task.add_done_callback(self._tasks.discard)
+
+    async def _run_for_message(self, data: dict) -> None:
+        from app.fanout.bot_exec import (
+            BOT_EXECUTION_TIMEOUT,
+            execute_bot_code,
+            process_bot_response,
+        )
+
+        code = self.config.get("code", "")
+        if not code or not code.strip():
+            return
+
+        msg_type = data.get("type", "")
+        is_dm = msg_type == "PRIV"
+
+        # Extract bot parameters from broadcast data
+        if is_dm:
+            conversation_key = data.get("conversation_key", "")
+            sender_key = data.get("sender_key") or conversation_key
+            is_outgoing = data.get("outgoing", False)
+            message_text = data.get("text", "")
+            channel_key = None
+            channel_name = None
+
+            # Outgoing DMs: sender is us, not the contact
+            if is_outgoing:
+                sender_name = None
+            else:
+                sender_name = data.get("sender_name")
+                if sender_name is None:
+                    from app.repository import ContactRepository
+
+                    contact = await ContactRepository.get_by_key(conversation_key)
+                    sender_name = contact.name if contact else None
+        else:
+            conversation_key = data.get("conversation_key", "")
+            sender_key = None
+            is_outgoing = bool(data.get("outgoing", False))
+            sender_name = data.get("sender_name")
+            channel_key = conversation_key
+
+            channel_name = data.get("channel_name")
+            if channel_name is None:
+                from app.repository import ChannelRepository
+
+                channel = await ChannelRepository.get_by_key(conversation_key)
+                channel_name = channel.name if channel else None
+
+            # Strip "sender: " prefix from channel message text
+            text = data.get("text", "")
+            if sender_name and text.startswith(f"{sender_name}: "):
+                message_text = text[len(f"{sender_name}: ") :]
+            else:
+                message_text = text
+
+        sender_timestamp = data.get("sender_timestamp")
+        path_value = data.get("path")
+        # Message model serializes paths as list of dicts; extract first path string
+        if path_value is None:
+            paths = data.get("paths")
+            if paths and isinstance(paths, list) and len(paths) > 0:
+                path_value = paths[0].get("path") if isinstance(paths[0], dict) else None
+
+        # Wait for message to settle (allows retransmissions to be deduped)
+        await asyncio.sleep(2)
+
+        # Execute bot code in thread pool with timeout
+        from app.fanout.bot_exec import _bot_executor, _bot_semaphore
+
+        async with _bot_semaphore:
+            loop = asyncio.get_running_loop()
+            try:
+                response = await asyncio.wait_for(
+                    loop.run_in_executor(
+                        _bot_executor,
+                        execute_bot_code,
+                        code,
+                        sender_name,
+                        sender_key,
+                        message_text,
+                        is_dm,
+                        channel_key,
+                        channel_name,
+                        sender_timestamp,
+                        path_value,
+                        is_outgoing,
+                    ),
+                    timeout=BOT_EXECUTION_TIMEOUT,
+                )
+            except asyncio.TimeoutError:
+                logger.warning("Bot '%s' execution timed out", self.name)
+                return
+            except Exception as e:
+                logger.warning("Bot '%s' execution error: %s", self.name, e)
+                return
+
+        if response and self._active:
+            await process_bot_response(response, is_dm, sender_key or "", channel_key)
+
+    @property
+    def status(self) -> str:
+        return "connected"

app/fanout/bot_exec.py

@@ -0,0 +1,259 @@
+"""
+Bot execution module for automatic message responses.
+
+This module provides functionality for executing user-defined Python code
+in response to incoming messages. The user's code can process message data
+and optionally return a response string or a list of strings.
+
+SECURITY WARNING: This executes arbitrary Python code provided by the user.
+It should only be enabled on trusted systems where the user understands
+the security implications.
+"""
+
+import asyncio
+import inspect
+import logging
+import time
+from concurrent.futures import ThreadPoolExecutor
+from typing import Any
+
+from fastapi import HTTPException
+
+logger = logging.getLogger(__name__)
+
+# Limit concurrent bot executions to prevent resource exhaustion
+_bot_semaphore = asyncio.Semaphore(100)
+
+# Dedicated thread pool for bot execution (separate from default executor)
+_bot_executor = ThreadPoolExecutor(max_workers=100, thread_name_prefix="bot_")
+
+# Timeout for bot code execution (seconds)
+BOT_EXECUTION_TIMEOUT = 10
+
+# Minimum spacing between bot message sends (seconds)
+# This ensures repeaters have time to return to listening mode
+BOT_MESSAGE_SPACING = 2.0
+
+# Global state for rate limiting bot sends
+_bot_send_lock = asyncio.Lock()
+_last_bot_send_time: float = 0.0
+
+
+def execute_bot_code(
+    code: str,
+    sender_name: str | None,
+    sender_key: str | None,
+    message_text: str,
+    is_dm: bool,
+    channel_key: str | None,
+    channel_name: str | None,
+    sender_timestamp: int | None,
+    path: str | None,
+    is_outgoing: bool = False,
+) -> str | list[str] | None:
+    """
+    Execute user-provided bot code with message context.
+
+    The code should define a function:
+    `bot(sender_name, sender_key, message_text, is_dm, channel_key, channel_name, sender_timestamp, path, is_outgoing)`
+    that returns either None (no response), a string (single response message),
+    or a list of strings (multiple messages sent in order).
+
+    Legacy bot functions with 8 parameters (without is_outgoing) are detected
+    via inspect and called without the new parameter for backward compatibility.
+
+    Args:
+        code: Python code defining the bot function
+        sender_name: Display name of the sender (may be None)
+        sender_key: 64-char hex public key of sender for DMs, None for channel messages
+        message_text: The message content
+        is_dm: True for direct messages, False for channel messages
+        channel_key: 32-char hex channel key for channel messages, None for DMs
+        channel_name: Channel name (e.g. "#general" with hash), None for DMs
+        sender_timestamp: Sender's timestamp from the message (may be None)
+        path: Hex-encoded routing path (may be None)
+        is_outgoing: True if this is our own outgoing message
+
+    Returns:
+        Response string, list of strings, or None.
+
+    Note: This executes arbitrary code. Only use with trusted input.
+    """
+    if not code or not code.strip():
+        return None
+
+    # Build execution namespace with allowed imports
+    namespace: dict[str, Any] = {
+        "__builtins__": __builtins__,
+    }
+
+    try:
+        # Execute the user's code to define the bot function
+        exec(code, namespace)
+    except Exception as e:
+        logger.warning("Bot code compilation failed: %s", e)
+        return None
+
+    # Check if bot function was defined
+    if "bot" not in namespace or not callable(namespace["bot"]):
+        logger.debug("Bot code does not define a callable 'bot' function")
+        return None
+
+    bot_func = namespace["bot"]
+
+    # Detect whether the bot function accepts is_outgoing (new 9-param signature)
+    # or uses the legacy 8-param signature, for backward compatibility.
+    # Three cases: explicit is_outgoing param or 9+ params (positional),
+    # **kwargs (pass as keyword), or legacy 8-param (omit).
+    call_style = "legacy"  # "positional", "keyword", or "legacy"
+    try:
+        sig = inspect.signature(bot_func)
+        params = sig.parameters
+        non_variadic = [
+            p
+            for p in params.values()
+            if p.kind not in (inspect.Parameter.VAR_POSITIONAL, inspect.Parameter.VAR_KEYWORD)
+        ]
+        if "is_outgoing" in params or len(non_variadic) >= 9:
+            call_style = "positional"
+        elif any(p.kind == inspect.Parameter.VAR_KEYWORD for p in params.values()):
+            call_style = "keyword"
+    except (ValueError, TypeError):
+        pass
+
+    try:
+        # Call the bot function with appropriate signature
+        if call_style == "positional":
+            result = bot_func(
+                sender_name,
+                sender_key,
+                message_text,
+                is_dm,
+                channel_key,
+                channel_name,
+                sender_timestamp,
+                path,
+                is_outgoing,
+            )
+        elif call_style == "keyword":
+            result = bot_func(
+                sender_name,
+                sender_key,
+                message_text,
+                is_dm,
+                channel_key,
+                channel_name,
+                sender_timestamp,
+                path,
+                is_outgoing=is_outgoing,
+            )
+        else:
+            result = bot_func(
+                sender_name,
+                sender_key,
+                message_text,
+                is_dm,
+                channel_key,
+                channel_name,
+                sender_timestamp,
+                path,
+            )
+
+        # Validate result
+        if result is None:
+            return None
+        if isinstance(result, str):
+            return result if result.strip() else None
+        if isinstance(result, list):
+            # Filter to non-empty strings only
+            valid_messages = [msg for msg in result if isinstance(msg, str) and msg.strip()]
+            return valid_messages if valid_messages else None
+
+        logger.debug("Bot function returned unsupported type: %s", type(result))
+        return None
+
+    except Exception as e:
+        logger.warning("Bot function execution failed: %s", e)
+        return None
+
+
+async def process_bot_response(
+    response: str | list[str],
+    is_dm: bool,
+    sender_key: str,
+    channel_key: str | None,
+) -> None:
+    """
+    Send the bot's response message(s) using the existing message sending endpoints.
+
+    For DMs, sends a direct message back to the sender.
+    For channel messages, sends to the same channel.
+
+    Bot messages are rate-limited to ensure at least BOT_MESSAGE_SPACING seconds
+    between sends, giving repeaters time to return to listening mode.
+
+    Args:
+        response: The response text to send, or a list of messages to send in order
+        is_dm: Whether the original message was a DM
+        sender_key: Public key of the original sender (for DM replies)
+        channel_key: Channel key for channel message replies
+    """
+    # Normalize to list for uniform processing
+    messages = [response] if isinstance(response, str) else response
+
+    for message_text in messages:
+        await _send_single_bot_message(message_text, is_dm, sender_key, channel_key)
+
+
+async def _send_single_bot_message(
+    message_text: str,
+    is_dm: bool,
+    sender_key: str,
+    channel_key: str | None,
+) -> None:
+    """
+    Send a single bot message with rate limiting.
+
+    Args:
+        message_text: The message text to send
+        is_dm: Whether the original message was a DM
+        sender_key: Public key of the original sender (for DM replies)
+        channel_key: Channel key for channel message replies
+    """
+    global _last_bot_send_time
+
+    from app.models import SendChannelMessageRequest, SendDirectMessageRequest
+    from app.routers.messages import send_channel_message, send_direct_message
+
+    # Serialize bot sends and enforce minimum spacing
+    async with _bot_send_lock:
+        # Calculate how long since last bot send
+        now = time.monotonic()
+        time_since_last = now - _last_bot_send_time
+
+        if _last_bot_send_time > 0 and time_since_last < BOT_MESSAGE_SPACING:
+            wait_time = BOT_MESSAGE_SPACING - time_since_last
+            logger.debug("Rate limiting bot send, waiting %.2fs", wait_time)
+            await asyncio.sleep(wait_time)
+
+        try:
+            if is_dm:
+                logger.info("Bot sending DM reply to %s", sender_key[:12])
+                request = SendDirectMessageRequest(destination=sender_key, text=message_text)
+                await send_direct_message(request)
+            elif channel_key:
+                logger.info("Bot sending channel reply to %s", channel_key[:8])
+                request = SendChannelMessageRequest(channel_key=channel_key, text=message_text)
+                await send_channel_message(request)
+            else:
+                logger.warning("Cannot send bot response: no destination")
+                return  # Don't update timestamp if we didn't send
+        except HTTPException as e:
+            logger.error("Bot failed to send response: %s", e.detail)
+            return  # Don't update timestamp on failure
+        except Exception as e:
+            logger.error("Bot failed to send response: %s", e)
+            return  # Don't update timestamp on failure
+
+        # Update last send time after successful send
+        _last_bot_send_time = time.monotonic()

app/fanout/community_mqtt.py

@@ -0,0 +1,568 @@
+"""Community MQTT publisher for sharing raw packets with the MeshCore community.
+
+Publishes raw packet data to mqtt-us-v1.letsmesh.net using the protocol
+defined by meshcore-packet-capture (https://github.com/agessaman/meshcore-packet-capture).
+
+Authentication uses Ed25519 JWT tokens signed with the radio's private key.
+This module is independent from the private MqttPublisher in app/mqtt.py.
+"""
+
+from __future__ import annotations
+
+import asyncio
+import base64
+import hashlib
+import importlib.metadata
+import json
+import logging
+import ssl
+import time
+from datetime import datetime
+from typing import Any, Protocol
+
+import aiomqtt
+import nacl.bindings
+
+from app.fanout.mqtt_base import BaseMqttPublisher
+from app.path_utils import parse_packet_envelope, split_path_hex
+
+logger = logging.getLogger(__name__)
+
+_DEFAULT_BROKER = "mqtt-us-v1.letsmesh.net"
+_DEFAULT_PORT = 443  # Community protocol uses WSS on port 443 by default
+_CLIENT_ID = "RemoteTerm (github.com/jkingsman/Remote-Terminal-for-MeshCore)"
+
+# Proactive JWT renewal: reconnect 1 hour before the 24h token expires
+_TOKEN_LIFETIME = 86400  # 24 hours (must match _generate_jwt_token exp)
+_TOKEN_RENEWAL_THRESHOLD = _TOKEN_LIFETIME - 3600  # 23 hours
+
+# Periodic status republish interval (matches meshcore-packet-capture reference)
+_STATS_REFRESH_INTERVAL = 300  # 5 minutes
+_STATS_MIN_CACHE_SECS = 60  # Don't re-fetch stats within 60s
+
+# Ed25519 group order
+_L = 2**252 + 27742317777372353535851937790883648493
+
+# Route type mapping: bottom 2 bits of first byte
+_ROUTE_MAP = {0: "F", 1: "F", 2: "D", 3: "T"}
+
+
+class CommunityMqttSettings(Protocol):
+    """Attributes expected on the settings object for the community MQTT publisher."""
+
+    community_mqtt_enabled: bool
+    community_mqtt_broker_host: str
+    community_mqtt_broker_port: int
+    community_mqtt_transport: str
+    community_mqtt_use_tls: bool
+    community_mqtt_tls_verify: bool
+    community_mqtt_auth_mode: str
+    community_mqtt_username: str
+    community_mqtt_password: str
+    community_mqtt_iata: str
+    community_mqtt_email: str
+    community_mqtt_token_audience: str
+
+
+def _base64url_encode(data: bytes) -> str:
+    """Base64url encode without padding."""
+    return base64.urlsafe_b64encode(data).rstrip(b"=").decode("ascii")
+
+
+def _ed25519_sign_expanded(
+    message: bytes, scalar: bytes, prefix: bytes, public_key: bytes
+) -> bytes:
+    """Sign a message using MeshCore's expanded Ed25519 key format.
+
+    MeshCore stores 64-byte "orlp" format keys: scalar(32) || prefix(32).
+    Standard Ed25519 libraries expect seed format and would re-SHA-512 the key.
+    This performs the signing manually using the already-expanded key material.
+
+    Port of meshcore-packet-capture's ed25519_sign_with_expanded_key().
+    """
+    # r = SHA-512(prefix || message) mod L
+    r = int.from_bytes(hashlib.sha512(prefix + message).digest(), "little") % _L
+    # R = r * B (base point multiplication)
+    R = nacl.bindings.crypto_scalarmult_ed25519_base_noclamp(r.to_bytes(32, "little"))
+    # k = SHA-512(R || public_key || message) mod L
+    k = int.from_bytes(hashlib.sha512(R + public_key + message).digest(), "little") % _L
+    # s = (r + k * scalar) mod L
+    s = (r + k * int.from_bytes(scalar, "little")) % _L
+    return R + s.to_bytes(32, "little")
+
+
+def _generate_jwt_token(
+    private_key: bytes,
+    public_key: bytes,
+    *,
+    audience: str = _DEFAULT_BROKER,
+    email: str = "",
+) -> str:
+    """Generate a JWT token for community MQTT authentication.
+
+    Creates a token with Ed25519 signature using MeshCore's expanded key format.
+    Token format: header_b64.payload_b64.signature_hex
+
+    Optional ``email`` embeds a node-claiming identity so the community
+    aggregator can associate this radio with an owner.
+    """
+    header = {"alg": "Ed25519", "typ": "JWT"}
+    now = int(time.time())
+    pubkey_hex = public_key.hex().upper()
+    payload: dict[str, object] = {
+        "publicKey": pubkey_hex,
+        "iat": now,
+        "exp": now + _TOKEN_LIFETIME,
+        "aud": audience,
+        "owner": pubkey_hex,
+        "client": _CLIENT_ID,
+    }
+    if email:
+        payload["email"] = email
+
+    header_b64 = _base64url_encode(json.dumps(header, separators=(",", ":")).encode())
+    payload_b64 = _base64url_encode(json.dumps(payload, separators=(",", ":")).encode())
+
+    signing_input = f"{header_b64}.{payload_b64}".encode()
+
+    scalar = private_key[:32]
+    prefix = private_key[32:]
+    signature = _ed25519_sign_expanded(signing_input, scalar, prefix, public_key)
+
+    return f"{header_b64}.{payload_b64}.{signature.hex()}"
+
+
+def _calculate_packet_hash(raw_bytes: bytes) -> str:
+    """Calculate packet hash matching MeshCore's Packet::calculatePacketHash().
+
+    Parses the packet structure to extract payload type and payload data,
+    then hashes: payload_type(1 byte) [+ path_len(2 bytes LE) for TRACE] + payload_data.
+    Returns first 16 hex characters (uppercase).
+    """
+    if not raw_bytes:
+        return "0" * 16
+
+    try:
+        envelope = parse_packet_envelope(raw_bytes)
+        if envelope is None:
+            return "0" * 16
+
+        # Hash: payload_type(1 byte) [+ path_byte as uint16_t LE for TRACE] + payload_data
+        # IMPORTANT: TRACE hash uses the raw wire byte (not decoded hop count) to match firmware.
+        hash_obj = hashlib.sha256()
+        hash_obj.update(bytes([envelope.payload_type]))
+        if envelope.payload_type == 9:  # PAYLOAD_TYPE_TRACE
+            hash_obj.update(envelope.path_byte.to_bytes(2, byteorder="little"))
+        hash_obj.update(envelope.payload)
+
+        return hash_obj.hexdigest()[:16].upper()
+    except Exception:
+        return "0" * 16
+
+
+def _decode_packet_fields(raw_bytes: bytes) -> tuple[str, str, str, list[str], int | None]:
+    """Decode packet fields used by the community uploader payload format.
+
+    Returns:
+        (route_letter, packet_type_str, payload_len_str, path_values, payload_type_int)
+    """
+    # Reference defaults when decode fails
+    route = "U"
+    packet_type = "0"
+    payload_len = "0"
+    path_values: list[str] = []
+    payload_type: int | None = None
+
+    try:
+        envelope = parse_packet_envelope(raw_bytes)
+        if envelope is None or envelope.payload_version != 0:
+            return route, packet_type, payload_len, path_values, payload_type
+
+        payload_type = envelope.payload_type
+        route = _ROUTE_MAP.get(envelope.route_type, "U")
+        packet_type = str(payload_type)
+        payload_len = str(len(envelope.payload))
+        path_values = split_path_hex(envelope.path.hex(), envelope.hop_count)
+
+        return route, packet_type, payload_len, path_values, payload_type
+    except Exception:
+        return route, packet_type, payload_len, path_values, payload_type
+
+
+def _format_raw_packet(data: dict[str, Any], device_name: str, public_key_hex: str) -> dict:
+    """Convert a RawPacketBroadcast dict to meshcore-packet-capture format."""
+    raw_hex = data.get("data", "")
+    raw_bytes = bytes.fromhex(raw_hex) if raw_hex else b""
+
+    route, packet_type, payload_len, path_values, _payload_type = _decode_packet_fields(raw_bytes)
+
+    # Reference format uses local "now" timestamp and derived time/date fields.
+    current_time = datetime.now()
+    ts_str = current_time.isoformat()
+
+    # SNR/RSSI are always strings in reference output.
+    snr_val = data.get("snr")
+    rssi_val = data.get("rssi")
+    snr = str(snr_val) if snr_val is not None else "Unknown"
+    rssi = str(rssi_val) if rssi_val is not None else "Unknown"
+
+    packet_hash = _calculate_packet_hash(raw_bytes)
+
+    packet = {
+        "origin": device_name or "MeshCore Device",
+        "origin_id": public_key_hex.upper(),
+        "timestamp": ts_str,
+        "type": "PACKET",
+        "direction": "rx",
+        "time": current_time.strftime("%H:%M:%S"),
+        "date": current_time.strftime("%d/%m/%Y"),
+        "len": str(len(raw_bytes)),
+        "packet_type": packet_type,
+        "route": route,
+        "payload_len": payload_len,
+        "raw": raw_hex.upper(),
+        "SNR": snr,
+        "RSSI": rssi,
+        "hash": packet_hash,
+    }
+
+    if route == "D":
+        packet["path"] = ",".join(path_values)
+
+    return packet
+
+
+def _build_status_topic(settings: CommunityMqttSettings, pubkey_hex: str) -> str:
+    """Build the ``meshcore/{IATA}/{PUBKEY}/status`` topic string."""
+    iata = settings.community_mqtt_iata.upper().strip()
+    return f"meshcore/{iata}/{pubkey_hex}/status"
+
+
+def _build_radio_info() -> str:
+    """Format the radio parameters string from self_info.
+
+    Matches the reference format: ``"freq,bw,sf,cr"`` (comma-separated raw
+    values).  Falls back to ``"0,0,0,0"`` when unavailable.
+    """
+    from app.radio import radio_manager
+
+    try:
+        if radio_manager.meshcore and radio_manager.meshcore.self_info:
+            info = radio_manager.meshcore.self_info
+            freq = info.get("radio_freq", 0)
+            bw = info.get("radio_bw", 0)
+            sf = info.get("radio_sf", 0)
+            cr = info.get("radio_cr", 0)
+            return f"{freq},{bw},{sf},{cr}"
+    except Exception:
+        pass
+    return "0,0,0,0"
+
+
+def _get_client_version() -> str:
+    """Return a client version string like ``'RemoteTerm 2.4.0'``."""
+    try:
+        version = importlib.metadata.version("remoteterm-meshcore")
+        return f"RemoteTerm {version}"
+    except Exception:
+        return "RemoteTerm unknown"
+
+
+class CommunityMqttPublisher(BaseMqttPublisher):
+    """Manages the community MQTT connection and publishes raw packets."""
+
+    _backoff_max = 60
+    _log_prefix = "Community MQTT"
+    _not_configured_timeout: float | None = 30
+
+    def __init__(self) -> None:
+        super().__init__()
+        self._key_unavailable_warned: bool = False
+        self._cached_device_info: dict[str, str] | None = None
+        self._cached_stats: dict[str, Any] | None = None
+        self._stats_supported: bool | None = None
+        self._last_stats_fetch: float = 0.0
+        self._last_status_publish: float = 0.0
+
+    async def start(self, settings: object) -> None:
+        self._key_unavailable_warned = False
+        self._cached_device_info = None
+        self._cached_stats = None
+        self._stats_supported = None
+        self._last_stats_fetch = 0.0
+        self._last_status_publish = 0.0
+        await super().start(settings)
+
+    def _on_not_configured(self) -> None:
+        from app.keystore import get_public_key, has_private_key
+        from app.websocket import broadcast_error
+
+        s: CommunityMqttSettings | None = self._settings
+        auth_mode = getattr(s, "community_mqtt_auth_mode", "token") if s else "token"
+        if (
+            s
+            and auth_mode == "token"
+            and get_public_key() is not None
+            and not has_private_key()
+            and not self._key_unavailable_warned
+        ):
+            broadcast_error(
+                "Community MQTT unavailable",
+                "Radio firmware does not support private key export.",
+            )
+            self._key_unavailable_warned = True
+
+    def _is_configured(self) -> bool:
+        """Check if community MQTT is enabled and keys are available."""
+        from app.keystore import get_public_key, has_private_key
+
+        s: CommunityMqttSettings | None = self._settings
+        if not s or not s.community_mqtt_enabled:
+            return False
+        if get_public_key() is None:
+            return False
+        auth_mode = getattr(s, "community_mqtt_auth_mode", "token")
+        if auth_mode == "token":
+            return has_private_key()
+        return True
+
+    def _build_client_kwargs(self, settings: object) -> dict[str, Any]:
+        s: CommunityMqttSettings = settings  # type: ignore[assignment]
+        from app.keystore import get_private_key, get_public_key
+        from app.radio import radio_manager
+
+        private_key = get_private_key()
+        public_key = get_public_key()
+        assert public_key is not None  # guaranteed by _pre_connect
+
+        pubkey_hex = public_key.hex().upper()
+        broker_host = s.community_mqtt_broker_host or _DEFAULT_BROKER
+        broker_port = s.community_mqtt_broker_port or _DEFAULT_PORT
+        transport = s.community_mqtt_transport or "websockets"
+        use_tls = bool(s.community_mqtt_use_tls)
+        tls_verify = bool(s.community_mqtt_tls_verify)
+        auth_mode = s.community_mqtt_auth_mode or "token"
+        secure_connection = use_tls and tls_verify
+
+        tls_context: ssl.SSLContext | None = None
+        if use_tls:
+            tls_context = ssl.create_default_context()
+            if not tls_verify:
+                tls_context.check_hostname = False
+                tls_context.verify_mode = ssl.CERT_NONE
+
+        device_name = ""
+        if radio_manager.meshcore and radio_manager.meshcore.self_info:
+            device_name = radio_manager.meshcore.self_info.get("name", "")
+
+        status_topic = _build_status_topic(s, pubkey_hex)
+        offline_payload = json.dumps(
+            {
+                "status": "offline",
+                "timestamp": datetime.now().isoformat(),
+                "origin": device_name or "MeshCore Device",
+                "origin_id": pubkey_hex,
+            }
+        )
+
+        kwargs: dict[str, Any] = {
+            "hostname": broker_host,
+            "port": broker_port,
+            "transport": transport,
+            "tls_context": tls_context,
+            "will": aiomqtt.Will(status_topic, offline_payload, retain=True),
+        }
+        if auth_mode == "token":
+            assert private_key is not None
+            token_audience = (s.community_mqtt_token_audience or "").strip() or broker_host
+            jwt_token = _generate_jwt_token(
+                private_key,
+                public_key,
+                audience=token_audience,
+                email=(s.community_mqtt_email or "") if secure_connection else "",
+            )
+            kwargs["username"] = f"v1_{pubkey_hex}"
+            kwargs["password"] = jwt_token
+        elif auth_mode == "password":
+            kwargs["username"] = s.community_mqtt_username or None
+            kwargs["password"] = s.community_mqtt_password or None
+        if transport == "websockets":
+            kwargs["websocket_path"] = "/"
+        return kwargs
+
+    def _on_connected(self, settings: object) -> tuple[str, str]:
+        s: CommunityMqttSettings = settings  # type: ignore[assignment]
+        broker_host = s.community_mqtt_broker_host or _DEFAULT_BROKER
+        broker_port = s.community_mqtt_broker_port or _DEFAULT_PORT
+        return ("Community MQTT connected", f"{broker_host}:{broker_port}")
+
+    async def _fetch_device_info(self) -> dict[str, str]:
+        """Fetch firmware model/version from the radio (cached for the connection)."""
+        if self._cached_device_info is not None:
+            return self._cached_device_info
+
+        from app.radio import RadioDisconnectedError, RadioOperationBusyError, radio_manager
+
+        fallback = {"model": "unknown", "firmware_version": "unknown"}
+        try:
+            async with radio_manager.radio_operation(
+                "community_stats_device_info", blocking=False
+            ) as mc:
+                event = await mc.commands.send_device_query()
+                from meshcore.events import EventType
+
+                if event.type == EventType.DEVICE_INFO:
+                    fw_ver = event.payload.get("fw ver", 0)
+                    if fw_ver >= 3:
+                        model = event.payload.get("model", "unknown") or "unknown"
+                        ver = event.payload.get("ver", "unknown") or "unknown"
+                        fw_build = event.payload.get("fw_build", "") or ""
+                        fw_str = f"v{ver} (Build: {fw_build})" if fw_build else f"v{ver}"
+                        self._cached_device_info = {
+                            "model": model,
+                            "firmware_version": fw_str,
+                        }
+                    else:
+                        # Old firmware — cache what we can
+                        self._cached_device_info = {
+                            "model": "unknown",
+                            "firmware_version": f"v{fw_ver}" if fw_ver else "unknown",
+                        }
+                    return self._cached_device_info
+        except (RadioOperationBusyError, RadioDisconnectedError):
+            pass
+        except Exception as e:
+            logger.debug("Community MQTT: device info fetch failed: %s", e)
+
+        # Don't cache transient failures — allow retry on next status publish
+        return fallback
+
+    async def _fetch_stats(self) -> dict[str, Any] | None:
+        """Fetch core + radio stats from the radio (best-effort, cached)."""
+        if self._stats_supported is False:
+            return self._cached_stats
+
+        now = time.monotonic()
+        if (
+            now - self._last_stats_fetch
+        ) < _STATS_MIN_CACHE_SECS and self._cached_stats is not None:
+            return self._cached_stats
+
+        from app.radio import RadioDisconnectedError, RadioOperationBusyError, radio_manager
+
+        try:
+            async with radio_manager.radio_operation("community_stats_fetch", blocking=False) as mc:
+                from meshcore.events import EventType
+
+                result: dict[str, Any] = {}
+
+                core_event = await mc.commands.get_stats_core()
+                if core_event.type == EventType.ERROR:
+                    logger.info("Community MQTT: firmware does not support stats commands")
+                    self._stats_supported = False
+                    return self._cached_stats
+                if core_event.type == EventType.STATS_CORE:
+                    result.update(core_event.payload)
+
+                radio_event = await mc.commands.get_stats_radio()
+                if radio_event.type == EventType.ERROR:
+                    logger.info("Community MQTT: firmware does not support stats commands")
+                    self._stats_supported = False
+                    return self._cached_stats
+                if radio_event.type == EventType.STATS_RADIO:
+                    result.update(radio_event.payload)
+
+                if result:
+                    self._cached_stats = result
+                    self._last_stats_fetch = now
+                    return self._cached_stats
+
+        except (RadioOperationBusyError, RadioDisconnectedError):
+            pass
+        except Exception as e:
+            logger.debug("Community MQTT: stats fetch failed: %s", e)
+
+        return self._cached_stats
+
+    async def _publish_status(
+        self, settings: CommunityMqttSettings, *, refresh_stats: bool = True
+    ) -> None:
+        """Build and publish the enriched retained status message."""
+        from app.keystore import get_public_key
+        from app.radio import radio_manager
+
+        public_key = get_public_key()
+        if public_key is None:
+            return
+
+        pubkey_hex = public_key.hex().upper()
+
+        device_name = ""
+        if radio_manager.meshcore and radio_manager.meshcore.self_info:
+            device_name = radio_manager.meshcore.self_info.get("name", "")
+
+        device_info = await self._fetch_device_info()
+        stats = await self._fetch_stats() if refresh_stats else self._cached_stats
+
+        status_topic = _build_status_topic(settings, pubkey_hex)
+        payload: dict[str, Any] = {
+            "status": "online",
+            "timestamp": datetime.now().isoformat(),
+            "origin": device_name or "MeshCore Device",
+            "origin_id": pubkey_hex,
+            "model": device_info.get("model", "unknown"),
+            "firmware_version": device_info.get("firmware_version", "unknown"),
+            "radio": _build_radio_info(),
+            "client_version": _get_client_version(),
+        }
+        if stats:
+            payload["stats"] = stats
+
+        await self.publish(status_topic, payload, retain=True)
+        self._last_status_publish = time.monotonic()
+
+    async def _on_connected_async(self, settings: object) -> None:
+        """Publish a retained online status message after connecting."""
+        await self._publish_status(settings)  # type: ignore[arg-type]
+
+    async def _on_periodic_wake(self, elapsed: float) -> None:
+        if not self._settings:
+            return
+        now = time.monotonic()
+        if (now - self._last_status_publish) >= _STATS_REFRESH_INTERVAL:
+            await self._publish_status(self._settings, refresh_stats=True)
+
+    def _on_error(self) -> tuple[str, str]:
+        return (
+            "Community MQTT connection failure",
+            "Check your internet connection or try again later.",
+        )
+
+    def _should_break_wait(self, elapsed: float) -> bool:
+        if not self.connected:
+            logger.info("Community MQTT publish failure detected, reconnecting")
+            return True
+        s: CommunityMqttSettings | None = self._settings
+        auth_mode = getattr(s, "community_mqtt_auth_mode", "token") if s else "token"
+        if auth_mode == "token" and elapsed >= _TOKEN_RENEWAL_THRESHOLD:
+            logger.info("Community MQTT JWT nearing expiry, reconnecting")
+            return True
+        return False
+
+    async def _pre_connect(self, settings: object) -> bool:
+        from app.keystore import get_private_key, get_public_key
+
+        s: CommunityMqttSettings = settings  # type: ignore[assignment]
+        auth_mode = s.community_mqtt_auth_mode or "token"
+        private_key = get_private_key()
+        public_key = get_public_key()
+        if public_key is None or (auth_mode == "token" and private_key is None):
+            # Keys not available yet, wait for settings change or key export
+            self.connected = False
+            self._version_event.clear()
+            try:
+                await asyncio.wait_for(self._version_event.wait(), timeout=30)
+            except asyncio.TimeoutError:
+                pass
+            return False
+        return True

app/fanout/manager.py

@@ -0,0 +1,243 @@
+"""FanoutManager: owns all active fanout modules and dispatches events."""
+
+from __future__ import annotations
+
+import asyncio
+import logging
+from typing import Any
+
+from app.fanout.base import FanoutModule
+
+logger = logging.getLogger(__name__)
+_DISPATCH_TIMEOUT_SECONDS = 30.0
+
+# Type string -> module class mapping
+_MODULE_TYPES: dict[str, type] = {}
+
+
+def _register_module_types() -> None:
+    """Lazily populate the type registry to avoid circular imports."""
+    if _MODULE_TYPES:
+        return
+    from app.fanout.apprise_mod import AppriseModule
+    from app.fanout.bot import BotModule
+    from app.fanout.mqtt_community import MqttCommunityModule
+    from app.fanout.mqtt_private import MqttPrivateModule
+    from app.fanout.webhook import WebhookModule
+
+    _MODULE_TYPES["mqtt_private"] = MqttPrivateModule
+    _MODULE_TYPES["mqtt_community"] = MqttCommunityModule
+    _MODULE_TYPES["bot"] = BotModule
+    _MODULE_TYPES["webhook"] = WebhookModule
+    _MODULE_TYPES["apprise"] = AppriseModule
+
+
+def _matches_filter(filter_value: Any, key: str) -> bool:
+    """Check a single filter value (channels or contacts) against a key.
+
+    Supported shapes:
+      "all"                        -> True
+      "none"                       -> False
+      ["key1", "key2"]             -> key in list  (only listed)
+      {"except": ["key1", "key2"]} -> key not in list  (all except listed)
+    """
+    if filter_value == "all":
+        return True
+    if filter_value == "none":
+        return False
+    if isinstance(filter_value, list):
+        return key in filter_value
+    if isinstance(filter_value, dict) and "except" in filter_value:
+        return key not in filter_value["except"]
+    return False
+
+
+def _scope_matches_message(scope: dict, data: dict) -> bool:
+    """Check whether a message event matches the given scope."""
+    messages = scope.get("messages", "none")
+    if messages == "all":
+        return True
+    if messages == "none":
+        return False
+    if isinstance(messages, dict):
+        msg_type = data.get("type", "")
+        conversation_key = data.get("conversation_key", "")
+        if msg_type == "CHAN":
+            return _matches_filter(messages.get("channels", "none"), conversation_key)
+        elif msg_type == "PRIV":
+            return _matches_filter(messages.get("contacts", "none"), conversation_key)
+    return False
+
+
+def _scope_matches_raw(scope: dict, _data: dict) -> bool:
+    """Check whether a raw packet event matches the given scope."""
+    return scope.get("raw_packets", "none") == "all"
+
+
+class FanoutManager:
+    """Owns all active fanout modules and dispatches events."""
+
+    def __init__(self) -> None:
+        self._modules: dict[str, tuple[FanoutModule, dict]] = {}  # id -> (module, scope)
+        self._restart_locks: dict[str, asyncio.Lock] = {}
+
+    async def load_from_db(self) -> None:
+        """Read enabled fanout_configs and instantiate modules."""
+        _register_module_types()
+        from app.repository.fanout import FanoutConfigRepository
+
+        configs = await FanoutConfigRepository.get_enabled()
+        for cfg in configs:
+            await self._start_module(cfg)
+
+    async def _start_module(self, cfg: dict[str, Any]) -> None:
+        """Instantiate and start a single module from a config dict."""
+        config_id = cfg["id"]
+        config_type = cfg["type"]
+        config_blob = cfg["config"]
+        scope = cfg["scope"]
+
+        # Skip bot modules when bots are disabled server-wide
+        if config_type == "bot":
+            from app.config import settings as server_settings
+
+            if server_settings.disable_bots:
+                logger.info("Skipping bot module %s (bots disabled by server config)", config_id)
+                return
+
+        cls = _MODULE_TYPES.get(config_type)
+        if cls is None:
+            logger.warning("Unknown fanout type %r for config %s, skipping", config_type, config_id)
+            return
+
+        try:
+            module = cls(config_id, config_blob, name=cfg.get("name", ""))
+            await module.start()
+            self._modules[config_id] = (module, scope)
+            logger.info(
+                "Started fanout module %s (type=%s)", cfg.get("name", config_id), config_type
+            )
+        except Exception:
+            logger.exception("Failed to start fanout module %s", config_id)
+
+    async def reload_config(self, config_id: str) -> None:
+        """Stop old module (if any) and start updated config."""
+        lock = self._restart_locks.setdefault(config_id, asyncio.Lock())
+        async with lock:
+            await self.remove_config(config_id)
+
+            from app.repository.fanout import FanoutConfigRepository
+
+            cfg = await FanoutConfigRepository.get(config_id)
+            if cfg is None or not cfg["enabled"]:
+                return
+            await self._start_module(cfg)
+
+    async def remove_config(self, config_id: str) -> None:
+        """Stop and remove a module."""
+        entry = self._modules.pop(config_id, None)
+        if entry is not None:
+            module, _ = entry
+            try:
+                await module.stop()
+            except Exception:
+                logger.exception("Error stopping fanout module %s", config_id)
+
+    async def _dispatch_matching(
+        self,
+        data: dict,
+        *,
+        matcher: Any,
+        handler_name: str,
+        log_label: str,
+    ) -> None:
+        """Dispatch to all matching modules concurrently."""
+        tasks = []
+        for config_id, (module, scope) in list(self._modules.items()):
+            if matcher(scope, data):
+                tasks.append(self._run_handler(config_id, module, handler_name, data, log_label))
+        if tasks:
+            await asyncio.gather(*tasks)
+
+    async def _run_handler(
+        self,
+        config_id: str,
+        module: FanoutModule,
+        handler_name: str,
+        data: dict,
+        log_label: str,
+    ) -> None:
+        """Run one module handler with per-module exception isolation."""
+        try:
+            handler = getattr(module, handler_name)
+            await asyncio.wait_for(handler(data), timeout=_DISPATCH_TIMEOUT_SECONDS)
+        except asyncio.TimeoutError:
+            logger.error(
+                "Fanout %s %s timed out after %.1fs; restarting module",
+                config_id,
+                log_label,
+                _DISPATCH_TIMEOUT_SECONDS,
+            )
+            await self._restart_module(config_id, module)
+        except Exception:
+            logger.exception("Fanout %s %s error", config_id, log_label)
+
+    async def _restart_module(self, config_id: str, module: FanoutModule) -> None:
+        """Restart a timed-out module if it is still the active instance."""
+        lock = self._restart_locks.setdefault(config_id, asyncio.Lock())
+        async with lock:
+            entry = self._modules.get(config_id)
+            if entry is None or entry[0] is not module:
+                return
+            try:
+                await module.stop()
+                await module.start()
+            except Exception:
+                logger.exception("Failed to restart timed-out fanout module %s", config_id)
+                self._modules.pop(config_id, None)
+
+    async def broadcast_message(self, data: dict) -> None:
+        """Dispatch a decoded message to modules whose scope matches."""
+        await self._dispatch_matching(
+            data,
+            matcher=_scope_matches_message,
+            handler_name="on_message",
+            log_label="on_message",
+        )
+
+    async def broadcast_raw(self, data: dict) -> None:
+        """Dispatch a raw packet to modules whose scope matches."""
+        await self._dispatch_matching(
+            data,
+            matcher=_scope_matches_raw,
+            handler_name="on_raw",
+            log_label="on_raw",
+        )
+
+    async def stop_all(self) -> None:
+        """Shutdown all modules."""
+        for config_id, (module, _) in list(self._modules.items()):
+            try:
+                await module.stop()
+            except Exception:
+                logger.exception("Error stopping fanout module %s", config_id)
+        self._modules.clear()
+        self._restart_locks.clear()
+
+    def get_statuses(self) -> dict[str, dict[str, str]]:
+        """Return status info for each active module."""
+        from app.repository.fanout import _configs_cache
+
+        result: dict[str, dict[str, str]] = {}
+        for config_id, (module, _) in self._modules.items():
+            info = _configs_cache.get(config_id, {})
+            result[config_id] = {
+                "name": info.get("name", config_id),
+                "type": info.get("type", "unknown"),
+                "status": module.status,
+            }
+        return result
+
+
+# Module-level singleton
+fanout_manager = FanoutManager()

app/fanout/mqtt.py

@@ -0,0 +1,91 @@
+"""MQTT publisher for forwarding mesh network events to an MQTT broker."""
+
+from __future__ import annotations
+
+import logging
+import ssl
+from typing import Any, Protocol
+
+from app.fanout.mqtt_base import BaseMqttPublisher
+
+logger = logging.getLogger(__name__)
+
+
+class PrivateMqttSettings(Protocol):
+    """Attributes expected on the settings object for the private MQTT publisher."""
+
+    mqtt_broker_host: str
+    mqtt_broker_port: int
+    mqtt_username: str
+    mqtt_password: str
+    mqtt_use_tls: bool
+    mqtt_tls_insecure: bool
+    mqtt_publish_messages: bool
+    mqtt_publish_raw_packets: bool
+
+
+class MqttPublisher(BaseMqttPublisher):
+    """Manages an MQTT connection and publishes mesh network events."""
+
+    _backoff_max = 30
+    _log_prefix = "MQTT"
+
+    def _is_configured(self) -> bool:
+        """Check if MQTT is configured and has something to publish."""
+        s: PrivateMqttSettings | None = self._settings
+        return bool(
+            s and s.mqtt_broker_host and (s.mqtt_publish_messages or s.mqtt_publish_raw_packets)
+        )
+
+    def _build_client_kwargs(self, settings: object) -> dict[str, Any]:
+        s: PrivateMqttSettings = settings  # type: ignore[assignment]
+        return {
+            "hostname": s.mqtt_broker_host,
+            "port": s.mqtt_broker_port,
+            "username": s.mqtt_username or None,
+            "password": s.mqtt_password or None,
+            "tls_context": self._build_tls_context(s),
+        }
+
+    def _on_connected(self, settings: object) -> tuple[str, str]:
+        s: PrivateMqttSettings = settings  # type: ignore[assignment]
+        return ("MQTT connected", f"{s.mqtt_broker_host}:{s.mqtt_broker_port}")
+
+    def _on_error(self) -> tuple[str, str]:
+        return ("MQTT connection failure", "Please correct the settings or disable.")
+
+    @staticmethod
+    def _build_tls_context(settings: PrivateMqttSettings) -> ssl.SSLContext | None:
+        """Build TLS context from settings, or None if TLS is disabled."""
+        if not settings.mqtt_use_tls:
+            return None
+        ctx = ssl.create_default_context()
+        if settings.mqtt_tls_insecure:
+            ctx.check_hostname = False
+            ctx.verify_mode = ssl.CERT_NONE
+        return ctx
+
+
+def _build_message_topic(prefix: str, data: dict[str, Any]) -> str:
+    """Build MQTT topic for a decrypted message."""
+    msg_type = data.get("type", "")
+    conversation_key = data.get("conversation_key", "unknown")
+
+    if msg_type == "PRIV":
+        return f"{prefix}/dm:{conversation_key}"
+    elif msg_type == "CHAN":
+        return f"{prefix}/gm:{conversation_key}"
+    return f"{prefix}/message:{conversation_key}"
+
+
+def _build_raw_packet_topic(prefix: str, data: dict[str, Any]) -> str:
+    """Build MQTT topic for a raw packet."""
+    info = data.get("decrypted_info")
+    if info and isinstance(info, dict):
+        contact_key = info.get("contact_key")
+        channel_key = info.get("channel_key")
+        if contact_key:
+            return f"{prefix}/raw/dm:{contact_key}"
+        if channel_key:
+            return f"{prefix}/raw/gm:{channel_key}"
+    return f"{prefix}/raw/unrouted"

app/fanout/mqtt_base.py

@@ -0,0 +1,232 @@
+"""Shared base class for MQTT publisher lifecycle management.
+
+Both ``MqttPublisher`` (private broker) and ``CommunityMqttPublisher``
+(community aggregator) inherit from ``BaseMqttPublisher``, which owns
+the connection-loop skeleton, reconnect/backoff logic, and publish method.
+Subclasses override a small set of hooks to control configuration checks,
+client construction, toast messages, and optional wait-loop behavior.
+"""
+
+from __future__ import annotations
+
+import asyncio
+import json
+import logging
+import time
+from abc import ABC, abstractmethod
+from typing import Any
+
+import aiomqtt
+
+logger = logging.getLogger(__name__)
+
+_BACKOFF_MIN = 5
+
+
+def _broadcast_health() -> None:
+    """Push updated health (including MQTT status) to all WS clients."""
+    from app.radio import radio_manager
+    from app.websocket import broadcast_health
+
+    broadcast_health(radio_manager.is_connected, radio_manager.connection_info)
+
+
+class BaseMqttPublisher(ABC):
+    """Base class for MQTT publishers with shared lifecycle management.
+
+    Subclasses implement the abstract hooks to control configuration checks,
+    client construction, toast messages, and optional wait-loop behavior.
+
+    The settings type is duck-typed — each subclass defines a Protocol
+    describing the attributes it expects (e.g. ``PrivateMqttSettings``,
+    ``CommunityMqttSettings``). Callers pass ``SimpleNamespace`` instances
+    that satisfy the protocol.
+    """
+
+    _backoff_max: int = 30
+    _log_prefix: str = "MQTT"
+    _not_configured_timeout: float | None = None  # None = block forever
+
+    def __init__(self) -> None:
+        self._client: aiomqtt.Client | None = None
+        self._task: asyncio.Task[None] | None = None
+        self._settings: Any = None
+        self._settings_version: int = 0
+        self._version_event: asyncio.Event = asyncio.Event()
+        self.connected: bool = False
+
+    # ── Lifecycle ──────────────────────────────────────────────────────
+
+    async def start(self, settings: object) -> None:
+        """Start the background connection loop."""
+        self._settings = settings
+        self._settings_version += 1
+        self._version_event.set()
+        if self._task is None or self._task.done():
+            self._task = asyncio.create_task(self._connection_loop())
+
+    async def stop(self) -> None:
+        """Cancel the background task and disconnect."""
+        if self._task and not self._task.done():
+            self._task.cancel()
+            try:
+                await self._task
+            except asyncio.CancelledError:
+                pass
+        self._task = None
+        self._client = None
+        self.connected = False
+
+    async def restart(self, settings: object) -> None:
+        """Called when settings change — stop + start."""
+        await self.stop()
+        await self.start(settings)
+
+    async def publish(self, topic: str, payload: dict[str, Any], *, retain: bool = False) -> None:
+        """Publish a JSON payload. Drops silently if not connected."""
+        if self._client is None or not self.connected:
+            return
+        try:
+            await self._client.publish(topic, json.dumps(payload), retain=retain)
+        except Exception as e:
+            logger.warning("%s publish failed on %s: %s", self._log_prefix, topic, e)
+            self.connected = False
+            # Wake the connection loop so it exits the wait and reconnects
+            self._settings_version += 1
+            self._version_event.set()
+
+    # ── Abstract hooks ─────────────────────────────────────────────────
+
+    @abstractmethod
+    def _is_configured(self) -> bool:
+        """Return True when this publisher should attempt to connect."""
+
+    @abstractmethod
+    def _build_client_kwargs(self, settings: object) -> dict[str, Any]:
+        """Return the keyword arguments for ``aiomqtt.Client(...)``."""
+
+    @abstractmethod
+    def _on_connected(self, settings: object) -> tuple[str, str]:
+        """Return ``(title, detail)`` for the success toast on connect."""
+
+    @abstractmethod
+    def _on_error(self) -> tuple[str, str]:
+        """Return ``(title, detail)`` for the error toast on connect failure."""
+
+    # ── Optional hooks ─────────────────────────────────────────────────
+
+    def _should_break_wait(self, elapsed: float) -> bool:
+        """Return True to break the inner wait (e.g. token expiry)."""
+        return False
+
+    async def _pre_connect(self, settings: object) -> bool:
+        """Called before connecting. Return True to proceed, False to retry."""
+        return True
+
+    def _on_not_configured(self) -> None:
+        """Called each time the loop finds the publisher not configured."""
+        return  # no-op by default; subclasses may override
+
+    async def _on_connected_async(self, settings: object) -> None:
+        """Async hook called after connection succeeds (before health broadcast).
+
+        Subclasses can override to publish messages immediately after connecting.
+        """
+        return  # no-op by default
+
+    async def _on_periodic_wake(self, elapsed: float) -> None:
+        """Called every ~60s while connected. Subclasses may override."""
+        return
+
+    # ── Connection loop ────────────────────────────────────────────────
+
+    async def _connection_loop(self) -> None:
+        """Background loop: connect, wait for version change, reconnect on failure."""
+        from app.websocket import broadcast_error, broadcast_success
+
+        backoff = _BACKOFF_MIN
+
+        while True:
+            if not self._is_configured():
+                self._on_not_configured()
+                self.connected = False
+                self._client = None
+                self._version_event.clear()
+                try:
+                    if self._not_configured_timeout is None:
+                        await self._version_event.wait()
+                    else:
+                        await asyncio.wait_for(
+                            self._version_event.wait(),
+                            timeout=self._not_configured_timeout,
+                        )
+                except asyncio.TimeoutError:
+                    continue
+                except asyncio.CancelledError:
+                    return
+                continue
+
+            settings = self._settings
+            assert settings is not None  # guaranteed by _is_configured()
+            version_at_connect = self._settings_version
+
+            try:
+                if not await self._pre_connect(settings):
+                    continue
+
+                client_kwargs = self._build_client_kwargs(settings)
+                connect_time = time.monotonic()
+
+                async with aiomqtt.Client(**client_kwargs) as client:
+                    self._client = client
+                    self.connected = True
+                    backoff = _BACKOFF_MIN
+
+                    title, detail = self._on_connected(settings)
+                    broadcast_success(title, detail)
+                    await self._on_connected_async(settings)
+                    _broadcast_health()
+
+                    # Wait until cancelled or settings version changes.
+                    # The 60s timeout is a housekeeping wake-up; actual connection
+                    # liveness is handled by paho-mqtt's keepalive mechanism.
+                    while self._settings_version == version_at_connect:
+                        self._version_event.clear()
+                        try:
+                            await asyncio.wait_for(self._version_event.wait(), timeout=60)
+                        except asyncio.TimeoutError:
+                            elapsed = time.monotonic() - connect_time
+                            await self._on_periodic_wake(elapsed)
+                            if self._should_break_wait(elapsed):
+                                break
+                            continue
+
+                # async with exited — client is now closed
+                self._client = None
+                self.connected = False
+                _broadcast_health()
+
+            except asyncio.CancelledError:
+                self.connected = False
+                self._client = None
+                return
+
+            except Exception as e:
+                self.connected = False
+                self._client = None
+
+                title, detail = self._on_error()
+                broadcast_error(title, detail)
+                _broadcast_health()
+                logger.warning(
+                    "%s connection error: %s (reconnecting in %ds)",
+                    self._log_prefix,
+                    e,
+                    backoff,
+                )
+
+                try:
+                    await asyncio.sleep(backoff)
+                except asyncio.CancelledError:
+                    return
+                backoff = min(backoff * 2, self._backoff_max)

app/fanout/mqtt_community.py

@@ -0,0 +1,138 @@
+"""Fanout module wrapping the community MQTT publisher."""
+
+from __future__ import annotations
+
+import logging
+import re
+import string
+from types import SimpleNamespace
+from typing import Any
+
+from app.fanout.base import FanoutModule
+from app.fanout.community_mqtt import CommunityMqttPublisher, _format_raw_packet
+
+logger = logging.getLogger(__name__)
+
+_IATA_RE = re.compile(r"^[A-Z]{3}$")
+_DEFAULT_PACKET_TOPIC_TEMPLATE = "meshcore/{IATA}/{PUBLIC_KEY}/packets"
+_TOPIC_TEMPLATE_FIELD_CANONICAL = {
+    "iata": "IATA",
+    "public_key": "PUBLIC_KEY",
+}
+
+
+def _normalize_topic_template(topic_template: str) -> str:
+    """Normalize packet topic template fields to canonical uppercase placeholders."""
+    template = topic_template.strip() or _DEFAULT_PACKET_TOPIC_TEMPLATE
+    parts: list[str] = []
+    try:
+        parsed = string.Formatter().parse(template)
+        for literal_text, field_name, format_spec, conversion in parsed:
+            parts.append(literal_text)
+            if field_name is None:
+                continue
+            normalized_field = _TOPIC_TEMPLATE_FIELD_CANONICAL.get(field_name.lower())
+            if normalized_field is None:
+                raise ValueError(f"Unsupported topic template field(s): {field_name}")
+            replacement = ["{", normalized_field]
+            if conversion:
+                replacement.extend(["!", conversion])
+            if format_spec:
+                replacement.extend([":", format_spec])
+            replacement.append("}")
+            parts.append("".join(replacement))
+    except ValueError:
+        raise
+
+    return "".join(parts)
+
+
+def _config_to_settings(config: dict) -> SimpleNamespace:
+    """Map a fanout config blob to a settings namespace for the CommunityMqttPublisher."""
+    return SimpleNamespace(
+        community_mqtt_enabled=True,
+        community_mqtt_broker_host=config.get("broker_host", "mqtt-us-v1.letsmesh.net"),
+        community_mqtt_broker_port=config.get("broker_port", 443),
+        community_mqtt_transport=config.get("transport", "websockets"),
+        community_mqtt_use_tls=config.get("use_tls", True),
+        community_mqtt_tls_verify=config.get("tls_verify", True),
+        community_mqtt_auth_mode=config.get("auth_mode", "token"),
+        community_mqtt_username=config.get("username", ""),
+        community_mqtt_password=config.get("password", ""),
+        community_mqtt_iata=config.get("iata", ""),
+        community_mqtt_email=config.get("email", ""),
+        community_mqtt_token_audience=config.get("token_audience", ""),
+    )
+
+
+def _render_packet_topic(topic_template: str, *, iata: str, public_key: str) -> str:
+    """Render the configured raw-packet publish topic."""
+    template = _normalize_topic_template(topic_template)
+    return template.format(IATA=iata, PUBLIC_KEY=public_key)
+
+
+class MqttCommunityModule(FanoutModule):
+    """Wraps a CommunityMqttPublisher for community packet sharing."""
+
+    def __init__(self, config_id: str, config: dict, *, name: str = "") -> None:
+        super().__init__(config_id, config, name=name)
+        self._publisher = CommunityMqttPublisher()
+
+    async def start(self) -> None:
+        settings = _config_to_settings(self.config)
+        await self._publisher.start(settings)
+
+    async def stop(self) -> None:
+        await self._publisher.stop()
+
+    async def on_message(self, data: dict) -> None:
+        # Community MQTT only publishes raw packets, not decoded messages.
+        pass
+
+    async def on_raw(self, data: dict) -> None:
+        if not self._publisher.connected or self._publisher._settings is None:
+            return
+        await _publish_community_packet(self._publisher, self.config, data)
+
+    @property
+    def status(self) -> str:
+        if self._publisher._is_configured():
+            return "connected" if self._publisher.connected else "disconnected"
+        return "disconnected"
+
+
+async def _publish_community_packet(
+    publisher: CommunityMqttPublisher,
+    config: dict,
+    data: dict[str, Any],
+) -> None:
+    """Format and publish a raw packet to the community broker."""
+    try:
+        from app.keystore import get_public_key
+        from app.radio import radio_manager
+
+        public_key = get_public_key()
+        if public_key is None:
+            return
+
+        pubkey_hex = public_key.hex().upper()
+
+        device_name = ""
+        if radio_manager.meshcore and radio_manager.meshcore.self_info:
+            device_name = radio_manager.meshcore.self_info.get("name", "")
+
+        packet = _format_raw_packet(data, device_name, pubkey_hex)
+        iata = config.get("iata", "").upper().strip()
+        if not _IATA_RE.fullmatch(iata):
+            logger.debug("Community MQTT: skipping publish — no valid IATA code configured")
+            return
+        topic = _render_packet_topic(
+            str(config.get("topic_template", _DEFAULT_PACKET_TOPIC_TEMPLATE)),
+            iata=iata,
+            public_key=pubkey_hex,
+        )
+
+        await publisher.publish(topic, packet)
+
+    except Exception as e:
+        logger.warning("Community MQTT broadcast error: %s", e)

app/fanout/mqtt_private.py

@@ -0,0 +1,61 @@
+"""Fanout module wrapping the private MQTT publisher."""
+
+from __future__ import annotations
+
+import logging
+from types import SimpleNamespace
+
+from app.fanout.base import FanoutModule
+from app.fanout.mqtt import MqttPublisher, _build_message_topic, _build_raw_packet_topic
+
+logger = logging.getLogger(__name__)
+
+
+def _config_to_settings(config: dict) -> SimpleNamespace:
+    """Map a fanout config blob to a settings namespace for the MqttPublisher."""
+    return SimpleNamespace(
+        mqtt_broker_host=config.get("broker_host", ""),
+        mqtt_broker_port=config.get("broker_port", 1883),
+        mqtt_username=config.get("username", ""),
+        mqtt_password=config.get("password", ""),
+        mqtt_use_tls=config.get("use_tls", False),
+        mqtt_tls_insecure=config.get("tls_insecure", False),
+        mqtt_topic_prefix=config.get("topic_prefix", "meshcore"),
+        mqtt_publish_messages=True,
+        mqtt_publish_raw_packets=True,
+    )
+
+
+class MqttPrivateModule(FanoutModule):
+    """Wraps an MqttPublisher instance for private MQTT forwarding."""
+
+    def __init__(self, config_id: str, config: dict, *, name: str = "") -> None:
+        super().__init__(config_id, config, name=name)
+        self._publisher = MqttPublisher()
+
+    async def start(self) -> None:
+        settings = _config_to_settings(self.config)
+        await self._publisher.start(settings)
+
+    async def stop(self) -> None:
+        await self._publisher.stop()
+
+    async def on_message(self, data: dict) -> None:
+        if not self._publisher.connected or self._publisher._settings is None:
+            return
+        prefix = self.config.get("topic_prefix", "meshcore")
+        topic = _build_message_topic(prefix, data)
+        await self._publisher.publish(topic, data)
+
+    async def on_raw(self, data: dict) -> None:
+        if not self._publisher.connected or self._publisher._settings is None:
+            return
+        prefix = self.config.get("topic_prefix", "meshcore")
+        topic = _build_raw_packet_topic(prefix, data)
+        await self._publisher.publish(topic, data)
+
+    @property
+    def status(self) -> str:
+        if not self.config.get("broker_host"):
+            return "disconnected"
+        return "connected" if self._publisher.connected else "disconnected"

app/fanout/webhook.py

@@ -0,0 +1,84 @@
+"""Fanout module for webhook (HTTP POST) delivery."""
+
+from __future__ import annotations
+
+import hashlib
+import hmac
+import json
+import logging
+
+import httpx
+
+from app.fanout.base import FanoutModule
+
+logger = logging.getLogger(__name__)
+
+
+class WebhookModule(FanoutModule):
+    """Delivers message data to an HTTP endpoint via POST (or configurable method)."""
+
+    def __init__(self, config_id: str, config: dict, *, name: str = "") -> None:
+        super().__init__(config_id, config, name=name)
+        self._client: httpx.AsyncClient | None = None
+        self._last_error: str | None = None
+
+    async def start(self) -> None:
+        self._client = httpx.AsyncClient(timeout=httpx.Timeout(10.0))
+        self._last_error = None
+
+    async def stop(self) -> None:
+        if self._client:
+            await self._client.aclose()
+            self._client = None
+
+    async def on_message(self, data: dict) -> None:
+        await self._send(data, event_type="message")
+
+    async def _send(self, data: dict, *, event_type: str) -> None:
+        if not self._client:
+            return
+
+        url = self.config.get("url", "")
+        if not url:
+            return
+
+        method = self.config.get("method", "POST").upper()
+        extra_headers = self.config.get("headers", {})
+        hmac_secret = self.config.get("hmac_secret", "")
+        hmac_header = self.config.get("hmac_header", "X-Webhook-Signature")
+
+        headers = {
+            "Content-Type": "application/json",
+            "X-Webhook-Event": event_type,
+            **extra_headers,
+        }
+
+        body_bytes = json.dumps(data, separators=(",", ":"), sort_keys=True).encode()
+
+        if hmac_secret:
+            sig = hmac.new(hmac_secret.encode(), body_bytes, hashlib.sha256).hexdigest()
+            headers[hmac_header or "X-Webhook-Signature"] = f"sha256={sig}"
+
+        try:
+            resp = await self._client.request(method, url, content=body_bytes, headers=headers)
+            resp.raise_for_status()
+            self._last_error = None
+        except httpx.HTTPStatusError as exc:
+            self._last_error = f"HTTP {exc.response.status_code}"
+            logger.warning(
+                "Webhook %s returned %s for %s",
+                self.config_id,
+                exc.response.status_code,
+                url,
+            )
+        except httpx.RequestError as exc:
+            self._last_error = str(exc)
+            logger.warning("Webhook %s request error: %s", self.config_id, exc)
+
+    @property
+    def status(self) -> str:
+        if not self.config.get("url"):
+            return "disconnected"
+        if self._last_error:
+            return "error"
+        return "connected"

app/frontend_static.py

@@ -0,0 +1,135 @@
+import logging
+from pathlib import Path
+
+from fastapi import FastAPI, HTTPException, Request
+from fastapi.responses import FileResponse, JSONResponse
+from fastapi.staticfiles import StaticFiles
+
+logger = logging.getLogger(__name__)
+
+
+def _resolve_request_origin(request: Request) -> str:
+    """Resolve the external origin, honoring common reverse-proxy headers."""
+    forwarded_proto = request.headers.get("x-forwarded-proto")
+    forwarded_host = request.headers.get("x-forwarded-host")
+
+    if forwarded_proto and forwarded_host:
+        proto = forwarded_proto.split(",")[0].strip()
+        host = forwarded_host.split(",")[0].strip()
+        if proto and host:
+            return f"{proto}://{host}"
+
+    return str(request.base_url).rstrip("/")
+
+
+def register_frontend_static_routes(app: FastAPI, frontend_dir: Path) -> bool:
+    """Register frontend static file routes if a built frontend is available.
+
+    Returns True when routes are registered, False when frontend files are
+    missing/incomplete. Missing frontend files are logged but are not fatal.
+    """
+    frontend_dir = frontend_dir.resolve()
+    index_file = frontend_dir / "index.html"
+    assets_dir = frontend_dir / "assets"
+
+    if not frontend_dir.exists():
+        logger.error(
+            "Frontend build directory not found at %s. "
+            "Run 'cd frontend && npm run build'. API will continue without frontend routes.",
+            frontend_dir,
+        )
+        return False
+
+    if not frontend_dir.is_dir():
+        logger.error(
+            "Frontend build path is not a directory: %s. "
+            "API will continue without frontend routes.",
+            frontend_dir,
+        )
+        return False
+
+    if not index_file.exists():
+        logger.error(
+            "Frontend index file not found at %s. "
+            "Run 'cd frontend && npm run build'. API will continue without frontend routes.",
+            index_file,
+        )
+        return False
+
+    if assets_dir.exists() and assets_dir.is_dir():
+        app.mount("/assets", StaticFiles(directory=assets_dir), name="assets")
+    else:
+        logger.warning(
+            "Frontend assets directory missing at %s; /assets files will not be served",
+            assets_dir,
+        )
+
+    @app.get("/")
+    async def serve_index():
+        """Serve the frontend index.html."""
+        return FileResponse(index_file)
+
+    @app.get("/site.webmanifest")
+    async def serve_webmanifest(request: Request):
+        """Serve a dynamic web manifest using the active request origin."""
+        origin = _resolve_request_origin(request)
+        manifest = {
+            "name": "RemoteTerm for MeshCore",
+            "short_name": "RemoteTerm",
+            "id": f"{origin}/",
+            "start_url": f"{origin}/",
+            "scope": f"{origin}/",
+            "display": "standalone",
+            "display_override": ["window-controls-overlay", "standalone", "fullscreen"],
+            "theme_color": "#111419",
+            "background_color": "#111419",
+            "icons": [
+                {
+                    "src": f"{origin}/web-app-manifest-192x192.png",
+                    "sizes": "192x192",
+                    "type": "image/png",
+                    "purpose": "maskable",
+                },
+                {
+                    "src": f"{origin}/web-app-manifest-512x512.png",
+                    "sizes": "512x512",
+                    "type": "image/png",
+                    "purpose": "maskable",
+                },
+            ],
+        }
+        return JSONResponse(
+            manifest,
+            media_type="application/manifest+json",
+            headers={"Cache-Control": "no-store"},
+        )
+
+    @app.get("/{path:path}")
+    async def serve_frontend(path: str):
+        """Serve frontend files, falling back to index.html for SPA routing."""
+        file_path = (frontend_dir / path).resolve()
+        try:
+            file_path.relative_to(frontend_dir)
+        except ValueError:
+            raise HTTPException(status_code=404, detail="Not found") from None
+
+        if file_path.exists() and file_path.is_file():
+            return FileResponse(file_path)
+
+        return FileResponse(index_file)
+
+    logger.info("Serving frontend from %s", frontend_dir)
+    return True
+
+
+def register_frontend_missing_fallback(app: FastAPI) -> None:
+    """Register a fallback route that tells the user to build the frontend."""
+
+    @app.get("/", include_in_schema=False)
+    async def frontend_not_built():
+        return JSONResponse(
+            status_code=404,
+            content={
+                "detail": "Frontend not built. Run: cd frontend && npm install && npm run build"
+            },
+        )

app/keystore.py

@@ -18,6 +18,13 @@ if TYPE_CHECKING:
 
 logger = logging.getLogger(__name__)
 
+NO_EVENT_RECEIVED_GUIDANCE = (
+    "Radio command channel is unresponsive (no_event_received). Ensure that your firmware is not "
+    "incompatible, outdated, or wrong-mode (e.g. repeater, not client), and that"
+    "serial/TCP/BLE connectivity is successful (try another app and see if that one works?). The app cannot proceed because it cannot "
+    "issue commands to the radio."
+)
+
 # In-memory storage for the private key and derived public key
 _private_key: bytes | None = None
 _public_key: bytes | None = None
@@ -64,14 +71,6 @@ def has_private_key() -> bool:
     return _private_key is not None
 
 
-def clear_private_key() -> None:
-    """Clear the stored private key from memory."""
-    global _private_key, _public_key
-    _private_key = None
-    _public_key = None
-    logger.info("Private key cleared from keystore")
-
-
 async def export_and_store_private_key(mc: "MeshCore") -> bool:
     """Export private key from the radio and store it in the keystore.
 
@@ -99,8 +98,14 @@ async def export_and_store_private_key(mc: "MeshCore") -> bool:
             )
             return False
         else:
+            reason = result.payload.get("reason") if isinstance(result.payload, dict) else None
+            if result.type == EventType.ERROR and reason == "no_event_received":
+                logger.error("%s Raw response: %s", NO_EVENT_RECEIVED_GUIDANCE, result.payload)
+                raise RuntimeError(NO_EVENT_RECEIVED_GUIDANCE)
             logger.error("Failed to export private key: %s", result.payload)
             return False
+    except RuntimeError:
+        raise
     except Exception as e:
         logger.error("Error exporting private key: %s", e)
         return False

app/main.py

@@ -1,34 +1,33 @@
+import asyncio
 import logging
 from contextlib import asynccontextmanager
 from pathlib import Path
 
-from fastapi import FastAPI
+from fastapi import FastAPI, Request
 from fastapi.middleware.cors import CORSMiddleware
-from fastapi.responses import FileResponse
-from fastapi.staticfiles import StaticFiles
+from fastapi.responses import JSONResponse
 
 from app.config import setup_logging
 from app.database import db
-from app.event_handlers import register_event_handlers
-from app.radio import radio_manager
+from app.frontend_static import register_frontend_missing_fallback, register_frontend_static_routes
+from app.radio import RadioDisconnectedError, radio_manager
 from app.radio_sync import (
-    drain_pending_messages,
-    start_message_polling,
-    start_periodic_sync,
     stop_message_polling,
+    stop_periodic_advert,
     stop_periodic_sync,
-    sync_and_offload_all,
-    sync_radio_time,
 )
 from app.routers import (
     channels,
     contacts,
+    fanout,
     health,
     messages,
     packets,
     radio,
     read_state,
+    repeaters,
     settings,
+    statistics,
     ws,
 )
 
@@ -36,60 +35,62 @@ setup_logging()
 logger = logging.getLogger(__name__)
 
 
+async def _startup_radio_connect_and_setup() -> None:
+    """Connect/setup the radio in the background so HTTP serving can start immediately."""
+    try:
+        connected = await radio_manager.reconnect(broadcast_on_success=False)
+        if connected:
+            await radio_manager.post_connect_setup()
+            from app.websocket import broadcast_health
+
+            broadcast_health(True, radio_manager.connection_info)
+            logger.info("Connected to radio")
+        else:
+            logger.warning("Failed to connect to radio on startup")
+    except Exception as e:
+        logger.warning("Failed to connect to radio on startup: %s", e)
+
+
 @asynccontextmanager
 async def lifespan(app: FastAPI):
     """Manage database and radio connection lifecycle."""
     await db.connect()
     logger.info("Database connected")
 
-    try:
-        await radio_manager.connect()
-        logger.info("Connected to radio")
-        if radio_manager.meshcore:
-            register_event_handlers(radio_manager.meshcore)
+    # Ensure default channels exist in the database even before the radio
+    # connects. Without this, a fresh or disconnected instance would return
+    # zero channels from GET /channels until the first successful radio sync.
+    from app.radio_sync import ensure_default_channels
 
-            # Export and store private key for server-side DM decryption
-            from app.keystore import export_and_store_private_key
-
-            await export_and_store_private_key(radio_manager.meshcore)
-
-            # Sync radio clock with system time
-            await sync_radio_time()
-
-            # Sync contacts/channels from radio to DB and clear radio
-            logger.info("Syncing and offloading radio data...")
-            result = await sync_and_offload_all()
-            logger.info("Sync complete: %s", result)
-
-            # Start periodic sync
-            start_periodic_sync()
-
-            # Send advertisement to announce our presence
-            logger.info("Sending startup advertisement...")
-            advert_result = await radio_manager.meshcore.commands.send_advert(flood=True)
-            logger.info("Advertisement sent: %s", advert_result.type)
-
-            await radio_manager.meshcore.start_auto_message_fetching()
-            logger.info("Auto message fetching started")
-
-            # Drain any messages that were queued before we connected
-            drained = await drain_pending_messages()
-            if drained > 0:
-                logger.info("Drained %d pending message(s)", drained)
-
-            # Start periodic message polling as fallback for unreliable push events
-            start_message_polling()
-    except Exception as e:
-        logger.warning("Failed to connect to radio on startup: %s", e)
+    await ensure_default_channels()
 
     # Always start connection monitor (even if initial connection failed)
     await radio_manager.start_connection_monitor()
 
+    # Start fanout modules (MQTT, etc.) from database configs
+    from app.fanout.manager import fanout_manager
+
+    try:
+        await fanout_manager.load_from_db()
+    except Exception as e:
+        logger.warning("Failed to start fanout modules: %s", e)
+
+    startup_radio_task = asyncio.create_task(_startup_radio_connect_and_setup())
+    app.state.startup_radio_task = startup_radio_task
+
     yield
 
     logger.info("Shutting down")
+    if startup_radio_task and not startup_radio_task.done():
+        startup_radio_task.cancel()
+        try:
+            await startup_radio_task
+        except asyncio.CancelledError:
+            pass
+    await fanout_manager.stop_all()
     await radio_manager.stop_connection_monitor()
     await stop_message_polling()
+    await stop_periodic_advert()
     await stop_periodic_sync()
     if radio_manager.meshcore:
         await radio_manager.meshcore.stop_auto_message_fetching()
@@ -97,10 +98,22 @@ async def lifespan(app: FastAPI):
     await db.disconnect()
 
 
+def _get_version() -> str:
+    """Read version from pyproject.toml so it stays in sync automatically."""
+    try:
+        pyproject = Path(__file__).resolve().parent.parent / "pyproject.toml"
+        for line in pyproject.read_text().splitlines():
+            if line.startswith("version = "):
+                return line.split('"')[1]
+    except Exception:
+        pass
+    return "0.0.0"
+
+
 app = FastAPI(
     title="RemoteTerm for MeshCore API",
     description="API for interacting with MeshCore mesh radio networks",
-    version="0.1.0",
+    version=_get_version(),
     lifespan=lifespan,
 )
 
@@ -112,35 +125,28 @@ app.add_middleware(
     allow_headers=["*"],
 )
 
+
+@app.exception_handler(RadioDisconnectedError)
+async def radio_disconnected_handler(request: Request, exc: RadioDisconnectedError):
+    """Return 503 when a radio disconnect race occurs during an operation."""
+    return JSONResponse(status_code=503, content={"detail": "Radio not connected"})
+
+
 # API routes - all prefixed with /api for production compatibility
 app.include_router(health.router, prefix="/api")
+app.include_router(fanout.router, prefix="/api")
 app.include_router(radio.router, prefix="/api")
 app.include_router(contacts.router, prefix="/api")
+app.include_router(repeaters.router, prefix="/api")
 app.include_router(channels.router, prefix="/api")
 app.include_router(messages.router, prefix="/api")
 app.include_router(packets.router, prefix="/api")
 app.include_router(read_state.router, prefix="/api")
 app.include_router(settings.router, prefix="/api")
+app.include_router(statistics.router, prefix="/api")
 app.include_router(ws.router, prefix="/api")
 
 # Serve frontend static files in production
 FRONTEND_DIR = Path(__file__).parent.parent / "frontend" / "dist"
-
-if FRONTEND_DIR.exists():
-    # Serve static assets (JS, CSS, etc.)
-    app.mount("/assets", StaticFiles(directory=FRONTEND_DIR / "assets"), name="assets")
-
-    # Serve other static files from frontend/dist (like wordlist)
-    @app.get("/{path:path}")
-    async def serve_frontend(path: str):
-        """Serve frontend files, falling back to index.html for SPA routing."""
-        file_path = FRONTEND_DIR / path
-        if file_path.exists() and file_path.is_file():
-            return FileResponse(file_path)
-        # Fall back to index.html for SPA routing
-        return FileResponse(FRONTEND_DIR / "index.html")
-
-    @app.get("/")
-    async def serve_index():
-        """Serve the frontend index.html."""
-        return FileResponse(FRONTEND_DIR / "index.html")
+if not register_frontend_static_routes(app, FRONTEND_DIR):
+    register_frontend_missing_fallback(app)

app/models.py

@@ -6,10 +6,11 @@ from pydantic import BaseModel, Field
 class Contact(BaseModel):
     public_key: str = Field(description="Public key (64-char hex)")
     name: str | None = None
-    type: int = 0  # 0=unknown, 1=client, 2=repeater, 3=room
+    type: int = 0  # 0=unknown, 1=client, 2=repeater, 3=room, 4=sensor
     flags: int = 0
     last_path: str | None = None
     last_path_len: int = -1
+    out_path_hash_mode: int = 0
     last_advert: int | None = None
     lat: float | None = None
     lon: float | None = None
@@ -17,6 +18,7 @@ class Contact(BaseModel):
     on_radio: bool = False
     last_contacted: int | None = None  # Last time we sent/received a message
     last_read_at: int | None = None  # Server-side read state tracking
+    first_seen: int | None = None
 
     def to_radio_dict(self) -> dict:
         """Convert to the dict format expected by meshcore radio commands.
@@ -31,9 +33,10 @@ class Contact(BaseModel):
             "flags": self.flags,
             "out_path": self.last_path or "",
             "out_path_len": self.last_path_len,
-            "adv_lat": self.lat or 0.0,
-            "adv_lon": self.lon or 0.0,
-            "last_advert": self.last_advert or 0,
+            "out_path_hash_mode": self.out_path_hash_mode,
+            "adv_lat": self.lat if self.lat is not None else 0.0,
+            "adv_lon": self.lon if self.lon is not None else 0.0,
+            "last_advert": self.last_advert if self.last_advert is not None else 0,
         }
 
     @staticmethod
@@ -50,6 +53,10 @@ class Contact(BaseModel):
             "flags": radio_data.get("flags", 0),
             "last_path": radio_data.get("out_path"),
             "last_path_len": radio_data.get("out_path_len", -1),
+            "out_path_hash_mode": radio_data.get(
+                "out_path_hash_mode",
+                -1 if radio_data.get("out_path_len", -1) == -1 else 0,
+            ),
             "lat": radio_data.get("adv_lat"),
             "lon": radio_data.get("adv_lon"),
             "last_advert": radio_data.get("last_advert"),
@@ -72,6 +79,71 @@ class CreateContactRequest(BaseModel):
 CONTACT_TYPE_REPEATER = 2
 
 
+class ContactAdvertPath(BaseModel):
+    """A unique advert path observed for a contact."""
+
+    path: str = Field(description="Hex-encoded routing path (empty string for direct)")
+    path_len: int = Field(description="Number of hops in the path")
+    next_hop: str | None = Field(
+        default=None,
+        description="First hop toward us as a full hop identifier, or null for direct",
+    )
+    first_seen: int = Field(description="Unix timestamp of first observation")
+    last_seen: int = Field(description="Unix timestamp of most recent observation")
+    heard_count: int = Field(description="Number of times this unique path was heard")
+
+
+class ContactAdvertPathSummary(BaseModel):
+    """Recent unique advertisement paths for a single contact."""
+
+    public_key: str = Field(description="Contact public key (64-char hex)")
+    paths: list[ContactAdvertPath] = Field(
+        default_factory=list, description="Most recent unique advert paths"
+    )
+
+
+class ContactNameHistory(BaseModel):
+    """A historical name used by a contact."""
+
+    name: str
+    first_seen: int
+    last_seen: int
+
+
+class ContactActiveRoom(BaseModel):
+    """A channel/room where a contact has been active."""
+
+    channel_key: str
+    channel_name: str
+    message_count: int
+
+
+class NearestRepeater(BaseModel):
+    """A repeater that has relayed a contact's advertisements."""
+
+    public_key: str
+    name: str | None = None
+    path_len: int
+    last_seen: int
+    heard_count: int
+
+
+class ContactDetail(BaseModel):
+    """Comprehensive contact profile data."""
+
+    contact: Contact
+    name_history: list[ContactNameHistory] = Field(default_factory=list)
+    dm_message_count: int = 0
+    channel_message_count: int = 0
+    most_active_rooms: list[ContactActiveRoom] = Field(default_factory=list)
+    advert_paths: list[ContactAdvertPath] = Field(default_factory=list)
+    advert_frequency: float | None = Field(
+        default=None,
+        description="Advert observations per hour (includes multi-path arrivals of same advert)",
+    )
+    nearest_repeaters: list[NearestRepeater] = Field(default_factory=list)
+
+
 class Channel(BaseModel):
     key: str = Field(description="Channel key (32-char hex)")
     name: str
@@ -80,11 +152,43 @@ class Channel(BaseModel):
     last_read_at: int | None = None  # Server-side read state tracking
 
 
+class ChannelMessageCounts(BaseModel):
+    """Time-windowed message counts for a channel."""
+
+    last_1h: int = 0
+    last_24h: int = 0
+    last_48h: int = 0
+    last_7d: int = 0
+    all_time: int = 0
+
+
+class ChannelTopSender(BaseModel):
+    """A top sender in a channel over the last 24 hours."""
+
+    sender_name: str
+    sender_key: str | None = None
+    message_count: int
+
+
+class ChannelDetail(BaseModel):
+    """Comprehensive channel profile data."""
+
+    channel: Channel
+    message_counts: ChannelMessageCounts = Field(default_factory=ChannelMessageCounts)
+    first_message_at: int | None = None
+    unique_sender_count: int = 0
+    top_senders_24h: list[ChannelTopSender] = Field(default_factory=list)
+
+
 class MessagePath(BaseModel):
     """A single path that a message took to reach us."""
 
-    path: str = Field(description="Hex-encoded routing path (2 chars per hop)")
+    path: str = Field(description="Hex-encoded routing path")
     received_at: int = Field(description="Unix timestamp when this path was received")
+    path_len: int | None = Field(
+        default=None,
+        description="Hop count. None = legacy (infer as len(path)//2, i.e. 1-byte hops)",
+    )
 
 
 class Message(BaseModel):
@@ -99,22 +203,17 @@ class Message(BaseModel):
     )
     txt_type: int = 0
     signature: str | None = None
+    sender_key: str | None = None
     outgoing: bool = False
     acked: int = 0
+    sender_name: str | None = None
+    channel_name: str | None = None
 
 
-class RawPacket(BaseModel):
-    """Raw packet as stored in the database."""
-
-    id: int
-    timestamp: int
-    data: str = Field(description="Hex-encoded packet data")
-    message_id: int | None = None
-
-    @property
-    def decrypted(self) -> bool:
-        """A packet is decrypted iff it has a linked message_id."""
-        return self.message_id is not None
+class MessagesAroundResponse(BaseModel):
+    messages: list[Message]
+    has_older: bool
+    has_newer: bool
 
 
 class RawPacketDecryptedInfo(BaseModel):
@@ -122,6 +221,8 @@ class RawPacketDecryptedInfo(BaseModel):
 
     channel_name: str | None = None
     sender: str | None = None
+    channel_key: str | None = None
+    contact_key: str | None = None
 
 
 class RawPacketBroadcast(BaseModel):
@@ -132,6 +233,11 @@ class RawPacketBroadcast(BaseModel):
     """
 
     id: int
+    observation_id: int = Field(
+        description=(
+            "Monotonic per-process ID for this RF observation (distinct from the DB packet row ID)"
+        )
+    )
     timestamp: int
     data: str = Field(description="Hex-encoded packet data")
     payload_type: str = Field(description="Packet type name (e.g., GROUP_TEXT, ADVERT)")
@@ -146,19 +252,96 @@ class SendMessageRequest(BaseModel):
 
 
 class SendDirectMessageRequest(SendMessageRequest):
-    destination: str = Field(description="Public key or prefix of recipient")
+    destination: str = Field(
+        description="Recipient public key (64-char hex preferred; prefix must resolve uniquely)"
+    )
 
 
 class SendChannelMessageRequest(SendMessageRequest):
     channel_key: str = Field(description="Channel key (32-char hex)")
 
 
-class TelemetryRequest(BaseModel):
+class RepeaterLoginRequest(BaseModel):
+    """Request to log in to a repeater."""
+
     password: str = Field(
-        default="", description="Repeater password (empty string for no password)"
+        default="", description="Repeater password (empty string for guest login)"
     )
 
 
+class RepeaterLoginResponse(BaseModel):
+    """Response from repeater login."""
+
+    status: str = Field(description="Login result status")
+
+
+class RepeaterStatusResponse(BaseModel):
+    """Status telemetry from a repeater (single attempt, no retries)."""
+
+    battery_volts: float = Field(description="Battery voltage in volts")
+    tx_queue_len: int = Field(description="Transmit queue length")
+    noise_floor_dbm: int = Field(description="Noise floor in dBm")
+    last_rssi_dbm: int = Field(description="Last RSSI in dBm")
+    last_snr_db: float = Field(description="Last SNR in dB")
+    packets_received: int = Field(description="Total packets received")
+    packets_sent: int = Field(description="Total packets sent")
+    airtime_seconds: int = Field(description="TX airtime in seconds")
+    rx_airtime_seconds: int = Field(description="RX airtime in seconds")
+    uptime_seconds: int = Field(description="Uptime in seconds")
+    sent_flood: int = Field(description="Flood packets sent")
+    sent_direct: int = Field(description="Direct packets sent")
+    recv_flood: int = Field(description="Flood packets received")
+    recv_direct: int = Field(description="Direct packets received")
+    flood_dups: int = Field(description="Duplicate flood packets")
+    direct_dups: int = Field(description="Duplicate direct packets")
+    full_events: int = Field(description="Full event queue count")
+
+
+class RepeaterRadioSettingsResponse(BaseModel):
+    """Radio settings from a repeater (batch CLI get commands)."""
+
+    firmware_version: str | None = Field(default=None, description="Firmware version string")
+    radio: str | None = Field(default=None, description="Radio settings (freq,bw,sf,cr)")
+    tx_power: str | None = Field(default=None, description="TX power in dBm")
+    airtime_factor: str | None = Field(default=None, description="Airtime factor")
+    repeat_enabled: str | None = Field(default=None, description="Repeat mode enabled")
+    flood_max: str | None = Field(default=None, description="Max flood hops")
+    name: str | None = Field(default=None, description="Repeater name")
+    lat: str | None = Field(default=None, description="Latitude")
+    lon: str | None = Field(default=None, description="Longitude")
+    clock_utc: str | None = Field(default=None, description="Repeater clock in UTC")
+
+
+class RepeaterAdvertIntervalsResponse(BaseModel):
+    """Advertisement intervals from a repeater."""
+
+    advert_interval: str | None = Field(default=None, description="Local advert interval")
+    flood_advert_interval: str | None = Field(default=None, description="Flood advert interval")
+
+
+class RepeaterOwnerInfoResponse(BaseModel):
+    """Owner info and guest password from a repeater."""
+
+    owner_info: str | None = Field(default=None, description="Owner info string")
+    guest_password: str | None = Field(default=None, description="Guest password")
+
+
+class LppSensor(BaseModel):
+    """A single CayenneLPP sensor reading from req_telemetry_sync."""
+
+    channel: int = Field(description="LPP channel number")
+    type_name: str = Field(description="Sensor type name (e.g. temperature, humidity)")
+    value: float | dict = Field(
+        description="Scalar value or dict for multi-value sensors (GPS, accel)"
+    )
+
+
+class RepeaterLppTelemetryResponse(BaseModel):
+    """CayenneLPP sensor telemetry from a repeater."""
+
+    sensors: list[LppSensor] = Field(default_factory=list, description="List of sensor readings")
+
+
 class NeighborInfo(BaseModel):
     """Information about a neighbor seen by a repeater."""
 
@@ -179,33 +362,32 @@ class AclEntry(BaseModel):
     permission_name: str = Field(description="Human-readable permission name")
 
 
-class TelemetryResponse(BaseModel):
-    """Telemetry data from a repeater, formatted for human readability."""
+class RepeaterNeighborsResponse(BaseModel):
+    """Neighbors list from a repeater."""
 
-    pubkey_prefix: str = Field(description="12-char public key prefix")
-    battery_volts: float = Field(description="Battery voltage in volts")
-    tx_queue_len: int = Field(description="Transmit queue length")
-    noise_floor_dbm: int = Field(description="Noise floor in dBm")
-    last_rssi_dbm: int = Field(description="Last RSSI in dBm")
-    last_snr_db: float = Field(description="Last SNR in dB")
-    packets_received: int = Field(description="Total packets received")
-    packets_sent: int = Field(description="Total packets sent")
-    airtime_seconds: int = Field(description="TX airtime in seconds")
-    rx_airtime_seconds: int = Field(description="RX airtime in seconds")
-    uptime_seconds: int = Field(description="Uptime in seconds")
-    sent_flood: int = Field(description="Flood packets sent")
-    sent_direct: int = Field(description="Direct packets sent")
-    recv_flood: int = Field(description="Flood packets received")
-    recv_direct: int = Field(description="Direct packets received")
-    flood_dups: int = Field(description="Duplicate flood packets")
-    direct_dups: int = Field(description="Duplicate direct packets")
-    full_events: int = Field(description="Full event queue count")
     neighbors: list[NeighborInfo] = Field(
         default_factory=list, description="List of neighbors seen by repeater"
     )
+
+
+class RepeaterAclResponse(BaseModel):
+    """ACL list from a repeater."""
+
     acl: list[AclEntry] = Field(default_factory=list, description="Access control list")
 
 
+class TraceResponse(BaseModel):
+    """Result of a direct (zero-hop) trace to a contact."""
+
+    remote_snr: float | None = Field(
+        default=None, description="SNR at which the target heard us (dB)"
+    )
+    local_snr: float | None = Field(
+        default=None, description="SNR at which we heard the target on the bounce-back (dB)"
+    )
+    path_len: int = Field(description="Number of hops in the trace path")
+
+
 class CommandRequest(BaseModel):
     """Request to send a CLI command to a repeater."""
 
@@ -229,12 +411,29 @@ class Favorite(BaseModel):
     id: str = Field(description="Channel key or contact public key")
 
 
+class UnreadCounts(BaseModel):
+    """Aggregated unread counts, mention flags, and last message times for all conversations."""
+
+    counts: dict[str, int] = Field(
+        default_factory=dict, description="Map of stateKey -> unread count"
+    )
+    mentions: dict[str, bool] = Field(
+        default_factory=dict, description="Map of stateKey -> has mention"
+    )
+    last_message_times: dict[str, int] = Field(
+        default_factory=dict, description="Map of stateKey -> last message timestamp"
+    )
+
+
 class AppSettings(BaseModel):
     """Application settings stored in the database."""
 
     max_radio_contacts: int = Field(
         default=200,
-        description="Maximum non-repeater contacts to keep on radio for DM ACKs",
+        description=(
+            "Maximum contacts to keep on radio for DM ACKs "
+            "(favorite contacts first, then recent non-repeaters)"
+        ),
     )
     favorites: list[Favorite] = Field(
         default_factory=list, description="List of favorited conversations"
@@ -255,3 +454,74 @@ class AppSettings(BaseModel):
         default=False,
         description="Whether preferences have been migrated from localStorage",
     )
+    advert_interval: int = Field(
+        default=0,
+        description="Periodic advertisement interval in seconds (0 = disabled)",
+    )
+    last_advert_time: int = Field(
+        default=0,
+        description="Unix timestamp of last advertisement sent (0 = never)",
+    )
+    flood_scope: str = Field(
+        default="",
+        description="Outbound flood scope / region name (empty = disabled, no tagging)",
+    )
+    blocked_keys: list[str] = Field(
+        default_factory=list,
+        description="Public keys whose messages are hidden from the UI",
+    )
+    blocked_names: list[str] = Field(
+        default_factory=list,
+        description="Display names whose messages are hidden from the UI",
+    )
+
+
+class FanoutConfig(BaseModel):
+    """Configuration for a single fanout integration."""
+
+    id: str
+    type: str  # 'mqtt_private' | 'mqtt_community' | 'bot' | 'webhook' | 'apprise'
+    name: str
+    enabled: bool
+    config: dict
+    scope: dict
+    sort_order: int = 0
+    created_at: int = 0
+
+
+class BusyChannel(BaseModel):
+    channel_key: str
+    channel_name: str
+    message_count: int
+
+
+class ContactActivityCounts(BaseModel):
+    last_hour: int
+    last_24_hours: int
+    last_week: int
+
+
+class PathHashWidthStats(BaseModel):
+    total_packets: int
+    single_byte: int
+    double_byte: int
+    triple_byte: int
+    single_byte_pct: float
+    double_byte_pct: float
+    triple_byte_pct: float
+
+
+class StatisticsResponse(BaseModel):
+    busiest_channels_24h: list[BusyChannel]
+    contact_count: int
+    repeater_count: int
+    channel_count: int
+    total_packets: int
+    decrypted_packets: int
+    undecrypted_packets: int
+    total_dms: int
+    total_channel_messages: int
+    total_outgoing: int
+    contacts_heard: ContactActivityCounts
+    repeaters_heard: ContactActivityCounts
+    path_hash_width_24h: PathHashWidthStats

app/packet_processor.py

@@ -15,6 +15,7 @@ are offloaded from the radio to the server.
 import asyncio
 import logging
 import time
+from itertools import count
 
 from app.decoder import (
     DecryptedDirectMessage,
@@ -27,9 +28,17 @@ from app.decoder import (
     try_decrypt_packet_with_channel_key,
 )
 from app.keystore import get_private_key, get_public_key, has_private_key
-from app.models import CONTACT_TYPE_REPEATER, RawPacketBroadcast, RawPacketDecryptedInfo
+from app.models import (
+    CONTACT_TYPE_REPEATER,
+    Message,
+    MessagePath,
+    RawPacketBroadcast,
+    RawPacketDecryptedInfo,
+)
 from app.repository import (
     ChannelRepository,
+    ContactAdvertPathRepository,
+    ContactNameHistoryRepository,
     ContactRepository,
     MessageRepository,
     RawPacketRepository,
@@ -38,6 +47,79 @@ from app.websocket import broadcast_error, broadcast_event
 
 logger = logging.getLogger(__name__)
 
+_raw_observation_counter = count(1)
+
+
+async def _handle_duplicate_message(
+    packet_id: int,
+    msg_type: str,
+    conversation_key: str,
+    text: str,
+    sender_timestamp: int,
+    path: str | None,
+    received: int,
+    path_len: int | None = None,
+) -> None:
+    """Handle a duplicate message by updating paths/acks on the existing record.
+
+    Called when MessageRepository.create returns None (INSERT OR IGNORE hit a duplicate).
+    Looks up the existing message, adds the new path, increments ack count for outgoing
+    messages, and broadcasts the update to clients.
+    """
+    existing_msg = await MessageRepository.get_by_content(
+        msg_type=msg_type,
+        conversation_key=conversation_key,
+        text=text,
+        sender_timestamp=sender_timestamp,
+    )
+    if not existing_msg:
+        label = "message" if msg_type == "CHAN" else "DM"
+        logger.warning(
+            "Duplicate %s for %s but couldn't find existing",
+            label,
+            conversation_key[:12],
+        )
+        return
+
+    logger.debug(
+        "Duplicate %s for %s (msg_id=%d, outgoing=%s) - adding path",
+        msg_type,
+        conversation_key[:12],
+        existing_msg.id,
+        existing_msg.outgoing,
+    )
+
+    # Add path if provided
+    if path is not None:
+        paths = await MessageRepository.add_path(existing_msg.id, path, received, path_len)
+    else:
+        # Get current paths for broadcast
+        paths = existing_msg.paths or []
+
+    # Increment ack count for outgoing messages (echo confirmation)
+    if existing_msg.outgoing:
+        ack_count = await MessageRepository.increment_ack_count(existing_msg.id)
+    else:
+        ack_count = existing_msg.acked
+
+    # Only broadcast when something actually changed:
+    # - outgoing: ack count was incremented
+    # - path provided: a new path entry was appended
+    # The path=None case happens for direct-delivery DMs (0-hop, no routing bytes).
+    # A non-outgoing duplicate with no new path changes nothing in the DB, so skip.
+    if existing_msg.outgoing or path is not None:
+        broadcast_event(
+            "message_acked",
+            {
+                "message_id": existing_msg.id,
+                "ack_count": ack_count,
+                "paths": [p.model_dump() for p in paths] if paths else [],
+            },
+        )
+
+    # Mark this packet as decrypted
+    await RawPacketRepository.mark_decrypted(packet_id, existing_msg.id)
+
 
 async def create_message_from_decrypted(
     packet_id: int,
@@ -47,6 +129,9 @@ async def create_message_from_decrypted(
     timestamp: int,
     received_at: int | None = None,
     path: str | None = None,
+    path_len: int | None = None,
+    channel_name: str | None = None,
+    realtime: bool = True,
 ) -> int | None:
     """Create a message record from decrypted channel packet content.
 
@@ -56,11 +141,13 @@ async def create_message_from_decrypted(
     Args:
         packet_id: ID of the raw packet being processed
         channel_key: Hex string channel key
+        channel_name: Channel name (e.g. "#general"), for bot context
         sender: Sender name (will be prefixed to message) or None
         message_text: The decrypted message content
         timestamp: Sender timestamp from the packet
         received_at: When the packet was received (defaults to now)
-        path: Hex-encoded routing path (None for historical decryption)
+        path: Hex-encoded routing path
+        realtime: If False, skip fanout dispatch (used for historical decryption)
 
     Returns the message ID if created, None if duplicate.
     """
@@ -72,6 +159,13 @@ async def create_message_from_decrypted(
     # Normalize channel key to uppercase for consistency
     channel_key_normalized = channel_key.upper()
 
+    # Resolve sender_key: look up contact by exact name match
+    resolved_sender_key: str | None = None
+    if sender:
+        candidates = await ContactRepository.get_by_name(sender)
+        if len(candidates) == 1:
+            resolved_sender_key = candidates[0].public_key
+
     # Try to create message - INSERT OR IGNORE handles duplicates atomically
     msg_id = await MessageRepository.create(
         msg_type="CHAN",
@@ -80,6 +174,9 @@ async def create_message_from_decrypted(
         sender_timestamp=timestamp,
         received_at=received,
         path=path,
+        path_len=path_len,
+        sender_name=sender,
+        sender_key=resolved_sender_key,
     )
 
     if msg_id is None:
@@ -87,52 +184,9 @@ async def create_message_from_decrypted(
         # 1. Our own outgoing message echoes back (flood routing)
         # 2. Same message arrives via multiple paths before first is committed
         # In either case, add the path to the existing message.
-        existing_msg = await MessageRepository.get_by_content(
-            msg_type="CHAN",
-            conversation_key=channel_key_normalized,
-            text=text,
-            sender_timestamp=timestamp,
+        await _handle_duplicate_message(
+            packet_id, "CHAN", channel_key_normalized, text, timestamp, path, received, path_len
         )
-        if not existing_msg:
-            logger.warning(
-                "Duplicate message for channel %s but couldn't find existing",
-                channel_key_normalized[:8],
-            )
-            return None
-
-        logger.debug(
-            "Duplicate message for channel %s (msg_id=%d, outgoing=%s) - adding path",
-            channel_key_normalized[:8],
-            existing_msg.id,
-            existing_msg.outgoing,
-        )
-
-        # Add path if provided
-        if path is not None:
-            paths = await MessageRepository.add_path(existing_msg.id, path, received)
-        else:
-            # Get current paths for broadcast
-            paths = existing_msg.paths or []
-
-        # Increment ack count for outgoing messages (echo confirmation)
-        if existing_msg.outgoing:
-            ack_count = await MessageRepository.increment_ack_count(existing_msg.id)
-        else:
-            ack_count = await MessageRepository.get_ack_count(existing_msg.id)
-
-        # Broadcast updated paths
-        broadcast_event(
-            "message_acked",
-            {
-                "message_id": existing_msg.id,
-                "ack_count": ack_count,
-                "paths": [p.model_dump() for p in paths] if paths else [],
-            },
-        )
-
-        # Mark this packet as decrypted
-        await RawPacketRepository.mark_decrypted(packet_id, existing_msg.id)
-
         return None
 
     logger.info("Stored channel message %d for channel %s", msg_id, channel_key_normalized[:8])
@@ -142,24 +196,28 @@ async def create_message_from_decrypted(
 
     # Build paths array for broadcast
     # Use "is not None" to include empty string (direct/0-hop messages)
-    paths = [{"path": path or "", "received_at": received}] if path is not None else None
+    paths = (
+        [MessagePath(path=path or "", received_at=received, path_len=path_len)]
+        if path is not None
+        else None
+    )
 
-    # Broadcast new message to connected clients
+    # Broadcast new message to connected clients (and fanout modules when realtime)
     broadcast_event(
         "message",
-        {
-            "id": msg_id,
-            "type": "CHAN",
-            "conversation_key": channel_key_normalized,
-            "text": text,
-            "sender_timestamp": timestamp,
-            "received_at": received,
-            "paths": paths,
-            "txt_type": 0,
-            "signature": None,
-            "outgoing": False,
-            "acked": 0,
-        },
+        Message(
+            id=msg_id,
+            type="CHAN",
+            conversation_key=channel_key_normalized,
+            text=text,
+            sender_timestamp=timestamp,
+            received_at=received,
+            paths=paths,
+            sender_name=sender,
+            sender_key=resolved_sender_key,
+            channel_name=channel_name,
+        ).model_dump(),
+        realtime=realtime,
     )
 
     return msg_id
@@ -172,7 +230,9 @@ async def create_dm_message_from_decrypted(
     our_public_key: str | None,
     received_at: int | None = None,
     path: str | None = None,
+    path_len: int | None = None,
     outgoing: bool = False,
+    realtime: bool = True,
 ) -> int | None:
     """Create a message record from decrypted direct message packet content.
 
@@ -185,16 +245,31 @@ async def create_dm_message_from_decrypted(
         their_public_key: The contact's full 64-char public key (conversation_key)
         our_public_key: Our public key (to determine direction), or None
         received_at: When the packet was received (defaults to now)
-        path: Hex-encoded routing path (None for historical decryption)
+        path: Hex-encoded routing path
         outgoing: Whether this is an outgoing message (we sent it)
+        realtime: If False, skip fanout dispatch (used for historical decryption)
 
     Returns the message ID if created, None if duplicate.
     """
+    # Check if sender is a repeater - repeaters only send CLI responses, not chat messages.
+    # CLI responses are handled by the command endpoint, not stored in chat history.
+    contact = await ContactRepository.get_by_key(their_public_key)
+    if contact and contact.type == CONTACT_TYPE_REPEATER:
+        logger.debug(
+            "Skipping message from repeater %s (CLI responses not stored): %s",
+            their_public_key[:12],
+            (decrypted.message or "")[:50],
+        )
+        return None
+
     received = received_at or int(time.time())
 
     # conversation_key is always the other party's public key
     conversation_key = their_public_key.lower()
 
+    # Resolve sender name for incoming messages (used for name-based blocking)
+    sender_name = contact.name if contact and not outgoing else None
+
     # Try to create message - INSERT OR IGNORE handles duplicates atomically
     msg_id = await MessageRepository.create(
         msg_type="PRIV",
@@ -203,56 +278,24 @@ async def create_dm_message_from_decrypted(
         sender_timestamp=decrypted.timestamp,
         received_at=received,
         path=path,
+        path_len=path_len,
         outgoing=outgoing,
+        sender_key=conversation_key if not outgoing else None,
+        sender_name=sender_name,
     )
 
     if msg_id is None:
         # Duplicate message detected
-        existing_msg = await MessageRepository.get_by_content(
-            msg_type="PRIV",
-            conversation_key=conversation_key,
-            text=decrypted.message,
-            sender_timestamp=decrypted.timestamp,
+        await _handle_duplicate_message(
+            packet_id,
+            "PRIV",
+            conversation_key,
+            decrypted.message,
+            decrypted.timestamp,
+            path,
+            received,
+            path_len,
         )
-        if not existing_msg:
-            logger.warning(
-                "Duplicate DM for contact %s but couldn't find existing",
-                conversation_key[:12],
-            )
-            return None
-
-        logger.debug(
-            "Duplicate DM for contact %s (msg_id=%d, outgoing=%s) - adding path",
-            conversation_key[:12],
-            existing_msg.id,
-            existing_msg.outgoing,
-        )
-
-        # Add path if provided
-        if path is not None:
-            paths = await MessageRepository.add_path(existing_msg.id, path, received)
-        else:
-            paths = existing_msg.paths or []
-
-        # Increment ack count for outgoing messages (echo confirmation)
-        if existing_msg.outgoing:
-            ack_count = await MessageRepository.increment_ack_count(existing_msg.id)
-        else:
-            ack_count = await MessageRepository.get_ack_count(existing_msg.id)
-
-        # Broadcast updated paths
-        broadcast_event(
-            "message_acked",
-            {
-                "message_id": existing_msg.id,
-                "ack_count": ack_count,
-                "paths": [p.model_dump() for p in paths] if paths else [],
-            },
-        )
-
-        # Mark this packet as decrypted
-        await RawPacketRepository.mark_decrypted(packet_id, existing_msg.id)
-
         return None
 
     logger.info(
@@ -266,24 +309,29 @@ async def create_dm_message_from_decrypted(
     await RawPacketRepository.mark_decrypted(packet_id, msg_id)
 
     # Build paths array for broadcast
-    paths = [{"path": path or "", "received_at": received}] if path is not None else None
+    paths = (
+        [MessagePath(path=path or "", received_at=received, path_len=path_len)]
+        if path is not None
+        else None
+    )
 
-    # Broadcast new message to connected clients
+    # Broadcast new message to connected clients (and fanout modules when realtime)
+    sender_name = contact.name if contact and not outgoing else None
     broadcast_event(
         "message",
-        {
-            "id": msg_id,
-            "type": "PRIV",
-            "conversation_key": conversation_key,
-            "text": decrypted.message,
-            "sender_timestamp": decrypted.timestamp,
-            "received_at": received,
-            "paths": paths,
-            "txt_type": 0,
-            "signature": None,
-            "outgoing": outgoing,
-            "acked": 0,
-        },
+        Message(
+            id=msg_id,
+            type="PRIV",
+            conversation_key=conversation_key,
+            text=decrypted.message,
+            sender_timestamp=decrypted.timestamp,
+            received_at=received,
+            paths=paths,
+            outgoing=outgoing,
+            sender_name=sender_name,
+            sender_key=conversation_key if not outgoing else None,
+        ).model_dump(),
+        realtime=realtime,
     )
 
     # Update contact's last_contacted timestamp (for sorting)
@@ -315,7 +363,14 @@ async def run_historical_dm_decryption(
     our_public_key_bytes = derive_public_key(private_key_bytes)
 
     for packet_id, packet_data, packet_timestamp in packets:
-        # Don't pass our_public_key - we want to decrypt both incoming AND outgoing messages.
+        # Note: passing our_public_key=None disables the outbound hash check in
+        # try_decrypt_dm (only the inbound check src_hash == their_first_byte runs).
+        # For the 255/256 case where our first byte differs from the contact's,
+        # outgoing packets fail the inbound check and are skipped — which is correct
+        # since outgoing DMs are stored directly by the send endpoint.
+        # For the 1/256 case where bytes match, an outgoing packet may decrypt
+        # successfully, but the dual-hash direction check below correctly identifies
+        # it and the DB dedup constraint prevents a duplicate insert.
         result = try_decrypt_dm(
             packet_data,
             private_key_bytes,
@@ -324,14 +379,25 @@ async def run_historical_dm_decryption(
         )
 
         if result is not None:
-            # Determine direction by checking src_hash
+            # Determine direction using both hashes (mirrors _process_direct_message
+            # logic at lines 806-818) to handle the 1/256 case where our first
+            # public key byte matches the contact's.
             src_hash = result.src_hash.lower()
+            dest_hash = result.dest_hash.lower()
             our_first_byte = format(our_public_key_bytes[0], "02x").lower()
-            outgoing = src_hash == our_first_byte
+
+            if src_hash == our_first_byte and dest_hash != our_first_byte:
+                outgoing = True
+            else:
+                # Incoming, ambiguous (both match), or neither matches.
+                # Default to incoming — outgoing DMs are stored by the send
+                # endpoint, so historical decryption only recovers incoming.
+                outgoing = False
 
             # Extract path from the raw packet for storage
             packet_info = parse_packet(packet_data)
             path_hex = packet_info.path.hex() if packet_info else None
+            path_len = packet_info.path_length if packet_info else None
 
             msg_id = await create_dm_message_from_decrypted(
                 packet_id=packet_id,
@@ -340,7 +406,9 @@ async def run_historical_dm_decryption(
                 our_public_key=our_public_key_bytes.hex(),
                 received_at=packet_timestamp,
                 path=path_hex,
+                path_len=path_len,
                 outgoing=outgoing,
+                realtime=False,  # Historical decryption should not trigger fanout
             )
 
             if msg_id is not None:
@@ -428,6 +496,7 @@ async def process_raw_packet(
     since the original packet was already processed.
     """
     ts = timestamp or int(time.time())
+    observation_id = next(_raw_observation_counter)
 
     packet_id, is_new_packet = await RawPacketRepository.create(raw_bytes, ts)
     raw_hex = raw_bytes.hex()
@@ -437,6 +506,13 @@ async def process_raw_packet(
     payload_type = packet_info.payload_type if packet_info else None
     payload_type_name = payload_type.name if payload_type else "Unknown"
 
+    if packet_info is None and len(raw_bytes) > 2:
+        logger.warning(
+            "Failed to parse %d-byte packet (id=%d); stored undecrypted",
+            len(raw_bytes),
+            packet_id,
+        )
+
     # Log packet arrival at debug level
     path_hex = packet_info.path.hex() if packet_info and packet_info.path else ""
     logger.debug(
@@ -469,8 +545,10 @@ async def process_raw_packet(
         if decrypt_result:
             result.update(decrypt_result)
 
-    elif payload_type == PayloadType.ADVERT and is_new_packet:
-        # Only process new advertisements (duplicates don't add value)
+    elif payload_type == PayloadType.ADVERT:
+        # Process all advert arrivals (even payload-hash duplicates) so the
+        # path-freshness logic in _process_advertisement can pick the shortest
+        # path heard within the freshness window.
         await _process_advertisement(raw_bytes, ts, packet_info)
 
     elif payload_type == PayloadType.TEXT_MESSAGE:
@@ -483,6 +561,7 @@ async def process_raw_packet(
     # This enables the frontend cracker to see all incoming packets in real-time
     broadcast_payload = RawPacketBroadcast(
         id=packet_id,
+        observation_id=observation_id,
         timestamp=ts,
         data=raw_hex,
         payload_type=payload_type_name,
@@ -492,6 +571,8 @@ async def process_raw_packet(
         decrypted_info=RawPacketDecryptedInfo(
             channel_name=result["channel_name"],
             sender=result["sender"],
+            channel_key=result.get("channel_key"),
+            contact_key=result.get("contact_key"),
         )
         if result["decrypted"]
         else None,
@@ -535,11 +616,13 @@ async def _process_group_text(
         msg_id = await create_message_from_decrypted(
             packet_id=packet_id,
             channel_key=channel.key,
+            channel_name=channel.name,
             sender=decrypted.sender,
             message_text=decrypted.message,
             timestamp=decrypted.timestamp,
             received_at=timestamp,
             path=packet_info.path.hex() if packet_info else None,
+            path_len=packet_info.path_length if packet_info else None,
         )
 
         return {
@@ -547,6 +630,7 @@ async def _process_group_text(
             "channel_name": channel.name,
             "sender": decrypted.sender,
             "message_id": msg_id,  # None if duplicate, msg_id if new
+            "channel_key": channel.key,
         }
 
     # Couldn't decrypt with any known key
@@ -581,7 +665,7 @@ async def _process_advertisement(
     new_path_hex = packet_info.path.hex() if packet_info.path else ""
 
     # Try to find existing contact
-    existing = await ContactRepository.get_by_key(advert.public_key)
+    existing = await ContactRepository.get_by_key(advert.public_key.lower())
 
     # Determine which path to use: keep shorter path if heard recently (within 60s)
     # This handles advertisement echoes through different routes
@@ -607,9 +691,11 @@ async def _process_advertisement(
         assert existing is not None  # Guaranteed by the conditions that set use_existing_path
         path_len = existing.last_path_len if existing.last_path_len is not None else -1
         path_hex = existing.last_path or ""
+        out_path_hash_mode = existing.out_path_hash_mode
     else:
         path_len = new_path_len
         path_hex = new_path_hex
+        out_path_hash_mode = packet_info.path_hash_size - 1
 
     logger.debug(
         "Parsed advertisement from %s: %s (role=%d, lat=%s, lon=%s, path_len=%d)",
@@ -627,8 +713,25 @@ async def _process_advertisement(
         advert.device_role if advert.device_role > 0 else (existing.type if existing else 0)
     )
 
+    # Keep recent unique advert paths for all contacts.
+    await ContactAdvertPathRepository.record_observation(
+        public_key=advert.public_key.lower(),
+        path_hex=new_path_hex,
+        timestamp=timestamp,
+        max_paths=10,
+        hop_count=new_path_len,
+    )
+
+    # Record name history
+    if advert.name:
+        await ContactNameHistoryRepository.record_name(
+            public_key=advert.public_key.lower(),
+            name=advert.name,
+            timestamp=timestamp,
+        )
+
     contact_data = {
-        "public_key": advert.public_key,
+        "public_key": advert.public_key.lower(),
         "name": advert.name,
         "type": contact_type,
         "lat": advert.lat,
@@ -637,27 +740,36 @@ async def _process_advertisement(
         "last_seen": timestamp,
         "last_path": path_hex,
         "last_path_len": path_len,
+        "out_path_hash_mode": out_path_hash_mode,
+        "first_seen": timestamp,  # COALESCE in upsert preserves existing value
     }
 
     await ContactRepository.upsert(contact_data)
+    claimed = await MessageRepository.claim_prefix_messages(advert.public_key.lower())
+    if claimed > 0:
+        logger.info(
+            "Claimed %d prefix DM message(s) for contact %s",
+            claimed,
+            advert.public_key[:12],
+        )
+    if advert.name:
+        backfilled = await MessageRepository.backfill_channel_sender_key(
+            advert.public_key, advert.name
+        )
+        if backfilled > 0:
+            logger.info(
+                "Backfilled sender_key on %d channel message(s) for %s",
+                backfilled,
+                advert.name,
+            )
 
-    # Broadcast contact update to connected clients
-    broadcast_event(
-        "contact",
-        {
-            "public_key": advert.public_key,
-            "name": advert.name,
-            "type": contact_type,
-            "flags": existing.flags if existing else 0,
-            "last_path": path_hex,
-            "last_path_len": path_len,
-            "last_advert": advert.timestamp if advert.timestamp > 0 else timestamp,
-            "lat": advert.lat,
-            "lon": advert.lon,
-            "last_seen": timestamp,
-            "on_radio": existing.on_radio if existing else False,
-        },
-    )
+    # Read back from DB so the broadcast includes all fields (last_contacted,
+    # last_read_at, flags, on_radio, etc.) matching the REST Contact shape exactly.
+    db_contact = await ContactRepository.get_by_key(advert.public_key.lower())
+    if db_contact:
+        broadcast_event("contact", db_contact.model_dump())
+    else:
+        broadcast_event("contact", contact_data)
 
     # For new contacts, optionally attempt to decrypt any historical DMs we may have stored
     # This is controlled by the auto_decrypt_dm_on_advert setting
@@ -666,7 +778,7 @@ async def _process_advertisement(
 
         settings = await AppSettingsRepository.get()
         if settings.auto_decrypt_dm_on_advert:
-            await start_historical_dm_decryption(None, advert.public_key, advert.name)
+            await start_historical_dm_decryption(None, advert.public_key.lower(), advert.name)
 
     # If this is not a repeater, trigger recent contacts sync to radio
     # This ensures we can auto-ACK DMs from recent contacts
@@ -738,9 +850,8 @@ async def _process_direct_message(
     # For outgoing: match dest_hash (recipient's first byte)
     match_hash = dest_hash if is_outgoing else src_hash
 
-    # Get all contacts and filter by first byte of public key
-    contacts = await ContactRepository.get_all(limit=1000)
-    candidate_contacts = [c for c in contacts if c.public_key.lower().startswith(match_hash)]
+    # Get contacts matching the first byte of public key via targeted SQL query
+    candidate_contacts = await ContactRepository.get_by_pubkey_first_byte(match_hash)
 
     if not candidate_contacts:
         logger.debug(
@@ -781,7 +892,8 @@ async def _process_direct_message(
                 their_public_key=contact.public_key,
                 our_public_key=our_public_key.hex(),
                 received_at=timestamp,
-                path=packet_info.path.hex() if packet_info.path else None,
+                path=packet_info.path.hex() if packet_info else None,
+                path_len=packet_info.path_length if packet_info else None,
                 outgoing=is_outgoing,
             )
 
@@ -790,6 +902,7 @@ async def _process_direct_message(
                 "contact_name": contact.name,
                 "sender": contact.name or contact.public_key[:12],
                 "message_id": msg_id,
+                "contact_key": contact.public_key,
             }
 
     # Couldn't decrypt with any known contact

app/path_utils.py

@@ -0,0 +1,150 @@
+"""
+Centralized helpers for MeshCore multi-byte path encoding.
+
+The path_len wire byte is packed as [hash_mode:2][hop_count:6]:
+  - hash_size = (hash_mode) + 1  →  1, 2, or 3 bytes per hop
+  - hop_count = lower 6 bits     →  0–63 hops
+  - wire bytes = hop_count × hash_size
+
+Mode 3 (hash_size=4) is reserved and rejected.
+"""
+
+from dataclasses import dataclass
+
+MAX_PATH_SIZE = 64
+
+
+@dataclass(frozen=True)
+class ParsedPacketEnvelope:
+    """Canonical packet framing parse matching MeshCore Packet::readFrom()."""
+
+    header: int
+    route_type: int
+    payload_type: int
+    payload_version: int
+    path_byte: int
+    hop_count: int
+    hash_size: int
+    path_byte_len: int
+    path: bytes
+    payload: bytes
+    payload_offset: int
+
+
+def decode_path_byte(path_byte: int) -> tuple[int, int]:
+    """Decode a packed path byte into (hop_count, hash_size).
+
+    Returns:
+        (hop_count, hash_size) where hash_size is 1, 2, or 3.
+
+    Raises:
+        ValueError: If hash_mode is 3 (reserved).
+    """
+    hash_mode = (path_byte >> 6) & 0x03
+    if hash_mode == 3:
+        raise ValueError(f"Reserved path hash mode 3 (path_byte=0x{path_byte:02X})")
+    hop_count = path_byte & 0x3F
+    hash_size = hash_mode + 1
+    return hop_count, hash_size
+
+
+def path_wire_len(hop_count: int, hash_size: int) -> int:
+    """Wire byte length of path data."""
+    return hop_count * hash_size
+
+
+def validate_path_byte(path_byte: int) -> tuple[int, int, int]:
+    """Validate a packed path byte using firmware-equivalent rules.
+
+    Returns:
+        (hop_count, hash_size, byte_len)
+
+    Raises:
+        ValueError: If the encoding uses reserved mode 3 or exceeds MAX_PATH_SIZE.
+    """
+    hop_count, hash_size = decode_path_byte(path_byte)
+    byte_len = path_wire_len(hop_count, hash_size)
+    if byte_len > MAX_PATH_SIZE:
+        raise ValueError(
+            f"Invalid path length {byte_len} bytes exceeds MAX_PATH_SIZE={MAX_PATH_SIZE}"
+        )
+    return hop_count, hash_size, byte_len
+
+
+def parse_packet_envelope(raw_packet: bytes) -> ParsedPacketEnvelope | None:
+    """Parse packet framing using firmware Packet::readFrom() semantics.
+
+    Validation matches the firmware's path checks:
+    - reserved mode 3 is invalid
+    - hop_count * hash_size must not exceed MAX_PATH_SIZE
+    - at least one payload byte must remain after the path
+    """
+    if len(raw_packet) < 2:
+        return None
+
+    try:
+        header = raw_packet[0]
+        route_type = header & 0x03
+        payload_type = (header >> 2) & 0x0F
+        payload_version = (header >> 6) & 0x03
+
+        offset = 1
+        if route_type in (0x00, 0x03):
+            if len(raw_packet) < offset + 4:
+                return None
+            offset += 4
+
+        if len(raw_packet) < offset + 1:
+            return None
+        path_byte = raw_packet[offset]
+        offset += 1
+
+        hop_count, hash_size, path_byte_len = validate_path_byte(path_byte)
+        if len(raw_packet) < offset + path_byte_len:
+            return None
+
+        path = raw_packet[offset : offset + path_byte_len]
+        offset += path_byte_len
+
+        if offset >= len(raw_packet):
+            return None
+
+        return ParsedPacketEnvelope(
+            header=header,
+            route_type=route_type,
+            payload_type=payload_type,
+            payload_version=payload_version,
+            path_byte=path_byte,
+            hop_count=hop_count,
+            hash_size=hash_size,
+            path_byte_len=path_byte_len,
+            path=path,
+            payload=raw_packet[offset:],
+            payload_offset=offset,
+        )
+    except (IndexError, ValueError):
+        return None
+
+
+def split_path_hex(path_hex: str, hop_count: int) -> list[str]:
+    """Split a hex path string into per-hop chunks using the known hop count.
+
+    If hop_count is 0 or the hex length doesn't divide evenly, falls back
+    to 2-char (1-byte) chunks for backward compatibility.
+    """
+    if not path_hex or hop_count <= 0:
+        return []
+    chars_per_hop = len(path_hex) // hop_count
+    if chars_per_hop < 2 or chars_per_hop % 2 != 0 or chars_per_hop * hop_count != len(path_hex):
+        # Inconsistent — fall back to legacy 2-char split
+        return [path_hex[i : i + 2] for i in range(0, len(path_hex), 2)]
+    return [path_hex[i : i + chars_per_hop] for i in range(0, len(path_hex), chars_per_hop)]
+
+
+def first_hop_hex(path_hex: str, hop_count: int) -> str | None:
+    """Extract the first hop identifier from a path hex string.
+
+    Returns None for empty/direct paths.
+    """
+    hops = split_path_hex(path_hex, hop_count)
+    return hops[0] if hops else None

app/radio.py

@@ -2,6 +2,7 @@ import asyncio
 import glob
 import logging
 import platform
+from contextlib import asynccontextmanager, nullcontext
 from pathlib import Path
 
 from meshcore import MeshCore
@@ -11,6 +12,18 @@ from app.config import settings
 logger = logging.getLogger(__name__)
 
 
+class RadioOperationError(RuntimeError):
+    """Base class for shared radio operation lock errors."""
+
+
+class RadioOperationBusyError(RadioOperationError):
+    """Raised when a non-blocking radio operation cannot acquire the lock."""
+
+
+class RadioDisconnectedError(RadioOperationError):
+    """Raised when the radio disconnects between pre-check and lock acquisition."""
+
+
 def detect_serial_devices() -> list[str]:
     """Detect available serial devices based on platform."""
     devices: list[str] = []
@@ -55,6 +68,7 @@ def detect_serial_devices() -> list[str]:
 
 async def test_serial_device(port: str, baudrate: int, timeout: float = 3.0) -> bool:
     """Test if a MeshCore radio responds on the given serial port."""
+    mc = None
     try:
         logger.debug("Testing serial device %s", port)
         mc = await asyncio.wait_for(
@@ -65,10 +79,8 @@ async def test_serial_device(port: str, baudrate: int, timeout: float = 3.0) ->
         # Check if we got valid self_info (indicates successful communication)
         if mc.is_connected and mc.self_info:
             logger.debug("Device %s responded with valid self_info", port)
-            await mc.disconnect()
             return True
 
-        await mc.disconnect()
         return False
     except asyncio.TimeoutError:
         logger.debug("Device %s timed out", port)
@@ -76,6 +88,12 @@ async def test_serial_device(port: str, baudrate: int, timeout: float = 3.0) ->
     except Exception as e:
         logger.debug("Device %s failed: %s", port, e)
         return False
+    finally:
+        if mc is not None:
+            try:
+                await mc.disconnect()
+            except Exception:
+                pass
 
 
 async def find_radio_port(baudrate: int) -> str | None:
@@ -102,18 +120,250 @@ class RadioManager:
 
     def __init__(self):
         self._meshcore: MeshCore | None = None
-        self._port: str | None = None
+        self._connection_info: str | None = None
         self._reconnect_task: asyncio.Task | None = None
         self._last_connected: bool = False
         self._reconnect_lock: asyncio.Lock | None = None
+        self._operation_lock: asyncio.Lock | None = None
+        self._setup_lock: asyncio.Lock | None = None
+        self._setup_in_progress: bool = False
+        self._setup_complete: bool = False
+        self.path_hash_mode: int = 0
+        self.path_hash_mode_supported: bool = False
+
+    async def _acquire_operation_lock(
+        self,
+        name: str,
+        *,
+        blocking: bool,
+    ) -> None:
+        """Acquire the shared radio operation lock."""
+
+        if self._operation_lock is None:
+            self._operation_lock = asyncio.Lock()
+
+        if not blocking:
+            if self._operation_lock.locked():
+                raise RadioOperationBusyError(f"Radio is busy (operation: {name})")
+            await self._operation_lock.acquire()
+        else:
+            await self._operation_lock.acquire()
+
+        logger.debug("Acquired radio operation lock (%s)", name)
+
+    def _release_operation_lock(self, name: str) -> None:
+        """Release the shared radio operation lock."""
+        if self._operation_lock and self._operation_lock.locked():
+            self._operation_lock.release()
+            logger.debug("Released radio operation lock (%s)", name)
+        else:
+            logger.error("Attempted to release unlocked radio operation lock (%s)", name)
+
+    @asynccontextmanager
+    async def radio_operation(
+        self,
+        name: str,
+        *,
+        pause_polling: bool = False,
+        suspend_auto_fetch: bool = False,
+        blocking: bool = True,
+    ):
+        """Acquire shared radio lock and optionally pause polling / auto-fetch.
+
+        After acquiring the lock, resolves the current MeshCore instance and
+        yields it.  Callers get a fresh reference via ``async with ... as mc:``,
+        avoiding stale-reference bugs when a reconnect swaps ``_meshcore``
+        between the pre-check and the lock acquisition.
+
+        Args:
+            name: Human-readable operation name for logs/errors.
+            pause_polling: Pause fallback message polling while held.
+            suspend_auto_fetch: Stop MeshCore auto message fetching while held.
+            blocking: If False, fail immediately when lock is held.
+
+        Raises:
+            RadioDisconnectedError: If the radio disconnected before the lock
+                was acquired (``_meshcore`` is ``None``).
+        """
+        await self._acquire_operation_lock(name, blocking=blocking)
+
+        mc = self._meshcore
+        if mc is None:
+            self._release_operation_lock(name)
+            raise RadioDisconnectedError("Radio disconnected")
+
+        poll_context = nullcontext()
+        if pause_polling:
+            from app.radio_sync import pause_polling as pause_polling_context
+
+            poll_context = pause_polling_context()
+
+        auto_fetch_paused = False
+
+        try:
+            async with poll_context:
+                if suspend_auto_fetch:
+                    await mc.stop_auto_message_fetching()
+                    auto_fetch_paused = True
+                yield mc
+        finally:
+            try:
+                if auto_fetch_paused:
+                    try:
+                        await mc.start_auto_message_fetching()
+                    except Exception as e:
+                        logger.warning("Failed to restart auto message fetching (%s): %s", name, e)
+            finally:
+                self._release_operation_lock(name)
+
+    async def post_connect_setup(self) -> None:
+        """Full post-connection setup: handlers, key export, sync, advertisements, polling.
+
+        Called after every successful connection or reconnection.
+        Idempotent — safe to call repeatedly (periodic tasks have start guards).
+        """
+        from app.event_handlers import register_event_handlers
+        from app.keystore import export_and_store_private_key
+        from app.radio_sync import (
+            drain_pending_messages,
+            send_advertisement,
+            start_message_polling,
+            start_periodic_advert,
+            start_periodic_sync,
+            sync_and_offload_all,
+            sync_radio_time,
+        )
+
+        if not self._meshcore:
+            return
+
+        if self._setup_lock is None:
+            self._setup_lock = asyncio.Lock()
+
+        async with self._setup_lock:
+            if not self._meshcore:
+                return
+            self._setup_in_progress = True
+            self._setup_complete = False
+            mc = self._meshcore
+            try:
+                # Register event handlers (no radio I/O, just callback setup)
+                register_event_handlers(mc)
+
+                # Hold the operation lock for all radio I/O during setup.
+                # This prevents user-initiated operations (send message, etc.)
+                # from interleaving commands on the serial link.
+                await self._acquire_operation_lock("post_connect_setup", blocking=True)
+                try:
+                    await export_and_store_private_key(mc)
+
+                    # Sync radio clock with system time
+                    await sync_radio_time(mc)
+
+                    # Apply flood scope from settings (best-effort; older firmware
+                    # may not support set_flood_scope)
+                    from app.repository import AppSettingsRepository
+
+                    app_settings = await AppSettingsRepository.get()
+                    scope = app_settings.flood_scope
+                    try:
+                        await mc.commands.set_flood_scope(scope if scope else "")
+                        logger.info("Applied flood_scope=%r", scope or "(disabled)")
+                    except Exception as exc:
+                        logger.warning(
+                            "set_flood_scope failed (firmware may not support it): %s", exc
+                        )
+
+                    # Query path hash mode support (best-effort; older firmware won't report it).
+                    # If the library's parsed payload is missing path_hash_mode (e.g. stale
+                    # .pyc on WSL2 Windows mounts), fall back to raw-frame extraction.
+                    reader = mc._reader
+                    _original_handle_rx = reader.handle_rx
+                    _captured_frame: list[bytes] = []
+
+                    async def _capture_handle_rx(data: bytearray) -> None:
+                        from meshcore.packets import PacketType
+
+                        if len(data) > 0 and data[0] == PacketType.DEVICE_INFO.value:
+                            _captured_frame.append(bytes(data))
+                        return await _original_handle_rx(data)
+
+                    reader.handle_rx = _capture_handle_rx
+                    self.path_hash_mode = 0
+                    self.path_hash_mode_supported = False
+                    try:
+                        device_query = await mc.commands.send_device_query()
+                        if device_query and "path_hash_mode" in device_query.payload:
+                            self.path_hash_mode = device_query.payload["path_hash_mode"]
+                            self.path_hash_mode_supported = True
+                        elif _captured_frame:
+                            # Raw-frame fallback: byte 1 = fw_ver, byte 81 = path_hash_mode
+                            raw = _captured_frame[-1]
+                            fw_ver = raw[1] if len(raw) > 1 else 0
+                            if fw_ver >= 10 and len(raw) >= 82:
+                                self.path_hash_mode = raw[81]
+                                self.path_hash_mode_supported = True
+                                logger.warning(
+                                    "path_hash_mode=%d extracted from raw frame "
+                                    "(stale .pyc? try: rm %s)",
+                                    self.path_hash_mode,
+                                    getattr(
+                                        __import__("meshcore.reader", fromlist=["reader"]),
+                                        "__cached__",
+                                        "meshcore __pycache__/reader.*.pyc",
+                                    ),
+                                )
+                        if self.path_hash_mode_supported:
+                            logger.info("Path hash mode: %d (supported)", self.path_hash_mode)
+                        else:
+                            logger.debug("Firmware does not report path_hash_mode")
+                    except Exception as exc:
+                        logger.debug("Failed to query path_hash_mode: %s", exc)
+                    finally:
+                        reader.handle_rx = _original_handle_rx
+
+                    # Sync contacts/channels from radio to DB and clear radio
+                    logger.info("Syncing and offloading radio data...")
+                    result = await sync_and_offload_all(mc)
+                    logger.info("Sync complete: %s", result)
+
+                    # Send advertisement to announce our presence (if enabled and not throttled)
+                    if await send_advertisement(mc):
+                        logger.info("Advertisement sent")
+                    else:
+                        logger.debug("Advertisement skipped (disabled or throttled)")
+
+                    # Drain any messages that were queued before we connected.
+                    # This must happen BEFORE starting auto-fetch, otherwise both
+                    # compete on get_msg() with interleaved radio I/O.
+                    drained = await drain_pending_messages(mc)
+                    if drained > 0:
+                        logger.info("Drained %d pending message(s)", drained)
+
+                    await mc.start_auto_message_fetching()
+                    logger.info("Auto message fetching started")
+                finally:
+                    self._release_operation_lock("post_connect_setup")
+
+                # Start background tasks AFTER releasing the operation lock.
+                # These tasks acquire their own locks when they need radio access.
+                start_periodic_sync()
+                start_periodic_advert()
+                start_message_polling()
+
+                self._setup_complete = True
+            finally:
+                self._setup_in_progress = False
+
+        logger.info("Post-connect setup complete")
 
     @property
     def meshcore(self) -> MeshCore | None:
         return self._meshcore
 
     @property
-    def port(self) -> str | None:
-        return self._port
+    def connection_info(self) -> str | None:
+        return self._connection_info
 
     @property
     def is_connected(self) -> bool:
@@ -123,11 +373,29 @@ class RadioManager:
     def is_reconnecting(self) -> bool:
         return self._reconnect_lock is not None and self._reconnect_lock.locked()
 
+    @property
+    def is_setup_in_progress(self) -> bool:
+        return self._setup_in_progress
+
+    @property
+    def is_setup_complete(self) -> bool:
+        return self._setup_complete
+
     async def connect(self) -> None:
-        """Connect to the radio over serial."""
+        """Connect to the radio using the configured transport."""
         if self._meshcore is not None:
             await self.disconnect()
 
+        connection_type = settings.connection_type
+        if connection_type == "tcp":
+            await self._connect_tcp()
+        elif connection_type == "ble":
+            await self._connect_ble()
+        else:
+            await self._connect_serial()
+
+    async def _connect_serial(self) -> None:
+        """Connect to the radio over serial."""
         port = settings.serial_port
 
         # Auto-detect if no port specified
@@ -148,19 +416,57 @@ class RadioManager:
             auto_reconnect=True,
             max_reconnect_attempts=10,
         )
-        self._port = port
+        self._connection_info = f"Serial: {port}"
         self._last_connected = True
+        self._setup_complete = False
         logger.debug("Serial connection established")
 
+    async def _connect_tcp(self) -> None:
+        """Connect to the radio over TCP."""
+        host = settings.tcp_host
+        port = settings.tcp_port
+
+        logger.debug("Connecting to radio at %s:%d (TCP)", host, port)
+        self._meshcore = await MeshCore.create_tcp(
+            host=host,
+            port=port,
+            auto_reconnect=True,
+            max_reconnect_attempts=10,
+        )
+        self._connection_info = f"TCP: {host}:{port}"
+        self._last_connected = True
+        self._setup_complete = False
+        logger.debug("TCP connection established")
+
+    async def _connect_ble(self) -> None:
+        """Connect to the radio over BLE."""
+        address = settings.ble_address
+        pin = settings.ble_pin
+
+        logger.debug("Connecting to radio at %s (BLE)", address)
+        self._meshcore = await MeshCore.create_ble(
+            address=address,
+            pin=pin,
+            auto_reconnect=True,
+            max_reconnect_attempts=15,
+        )
+        self._connection_info = f"BLE: {address}"
+        self._last_connected = True
+        self._setup_complete = False
+        logger.debug("BLE connection established")
+
     async def disconnect(self) -> None:
         """Disconnect from the radio."""
         if self._meshcore is not None:
             logger.debug("Disconnecting from radio")
             await self._meshcore.disconnect()
             self._meshcore = None
+            self._setup_complete = False
+            self.path_hash_mode = 0
+            self.path_hash_mode_supported = False
             logger.debug("Radio disconnected")
 
-    async def reconnect(self) -> bool:
+    async def reconnect(self, *, broadcast_on_success: bool = True) -> bool:
         """Attempt to reconnect to the radio.
 
         Returns True if reconnection was successful, False otherwise.
@@ -172,12 +478,13 @@ class RadioManager:
         if self._reconnect_lock is None:
             self._reconnect_lock = asyncio.Lock()
 
-        # Try to acquire lock without blocking to check if reconnect is in progress
-        if self._reconnect_lock.locked():
-            logger.debug("Reconnection already in progress")
-            return False
-
         async with self._reconnect_lock:
+            # If we became connected while waiting for the lock (another
+            # reconnect succeeded ahead of us), skip the redundant attempt.
+            if self.is_connected:
+                logger.debug("Already connected after acquiring lock, skipping reconnect")
+                return True
+
             logger.info("Attempting to reconnect to radio...")
 
             try:
@@ -193,8 +500,9 @@ class RadioManager:
                 await self.connect()
 
                 if self.is_connected:
-                    logger.info("Radio reconnected successfully at %s", self._port)
-                    broadcast_health(True, self._port)
+                    logger.info("Radio reconnected successfully at %s", self._connection_info)
+                    if broadcast_on_success:
+                        broadcast_health(True, self._connection_info)
                     return True
                 else:
                     logger.warning("Reconnection failed: not connected after connect()")
@@ -213,9 +521,13 @@ class RadioManager:
         async def monitor_loop():
             from app.websocket import broadcast_health
 
+            CHECK_INTERVAL_SECONDS = 5
+            UNRESPONSIVE_THRESHOLD = 3
+            consecutive_setup_failures = 0
+
             while True:
                 try:
-                    await asyncio.sleep(5)  # Check every 5 seconds
+                    await asyncio.sleep(CHECK_INTERVAL_SECONDS)
 
                     current_connected = self.is_connected
 
@@ -223,34 +535,55 @@ class RadioManager:
                     if self._last_connected and not current_connected:
                         # Connection lost
                         logger.warning("Radio connection lost, broadcasting status change")
-                        broadcast_health(False, self._port)
+                        broadcast_health(False, self._connection_info)
                         self._last_connected = False
+                        consecutive_setup_failures = 0
 
-                        # Attempt reconnection
-                        await asyncio.sleep(3)  # Wait a bit before trying
-                        if await self.reconnect():
-                            # Re-register event handlers after successful reconnect
-                            from app.event_handlers import register_event_handlers
-                            from app.keystore import export_and_store_private_key
-
-                            if self._meshcore:
-                                register_event_handlers(self._meshcore)
-                                await export_and_store_private_key(self._meshcore)
-                                await self._meshcore.start_auto_message_fetching()
-                                logger.info("Event handlers re-registered after auto-reconnect")
+                    if not current_connected:
+                        # Attempt reconnection on every loop while disconnected
+                        if not self.is_reconnecting and await self.reconnect(
+                            broadcast_on_success=False
+                        ):
+                            await self.post_connect_setup()
+                            broadcast_health(True, self._connection_info)
+                            self._last_connected = True
+                            consecutive_setup_failures = 0
 
                     elif not self._last_connected and current_connected:
-                        # Connection restored (might have reconnected automatically)
+                        # Connection restored (might have reconnected automatically).
+                        # Always run setup before reporting healthy.
                         logger.info("Radio connection restored")
-                        broadcast_health(True, self._port)
+                        await self.post_connect_setup()
+                        broadcast_health(True, self._connection_info)
                         self._last_connected = True
+                        consecutive_setup_failures = 0
+
+                    elif current_connected and not self._setup_complete:
+                        # Transport connected but setup incomplete — retry
+                        logger.info("Retrying post-connect setup...")
+                        await self.post_connect_setup()
+                        broadcast_health(True, self._connection_info)
+                        consecutive_setup_failures = 0
 
                 except asyncio.CancelledError:
                     # Task is being cancelled, exit cleanly
                     break
                 except Exception as e:
-                    # Log error but continue monitoring - don't let the monitor die
-                    logger.exception("Error in connection monitor, continuing: %s", e)
+                    consecutive_setup_failures += 1
+                    if consecutive_setup_failures == UNRESPONSIVE_THRESHOLD:
+                        logger.error(
+                            "Post-connect setup has failed %d times in a row. "
+                            "The radio port appears open but the radio is not "
+                            "responding to commands. Common causes: another "
+                            "process has the serial port open (check for other "
+                            "RemoteTerm instances, serial monitors, etc.), the "
+                            "firmware is in repeater mode (not client), or the "
+                            "radio needs a power cycle. Will keep retrying.",
+                            consecutive_setup_failures,
+                        )
+                    elif consecutive_setup_failures < UNRESPONSIVE_THRESHOLD:
+                        logger.exception("Error in connection monitor, continuing: %s", e)
+                    # After the threshold, silently retry (avoid log spam)
 
         self._reconnect_task = asyncio.create_task(monitor_loop())
         logger.info("Radio connection monitor started")

app/radio_sync.py

@@ -14,20 +14,65 @@ import logging
 import time
 from contextlib import asynccontextmanager
 
-from meshcore import EventType
+from meshcore import EventType, MeshCore
 
-from app.config import settings
+from app.event_handlers import cleanup_expired_acks
 from app.models import Contact
-from app.radio import radio_manager
-from app.repository import ChannelRepository, ContactRepository
+from app.radio import RadioOperationBusyError, radio_manager
+from app.repository import (
+    AmbiguousPublicKeyPrefixError,
+    AppSettingsRepository,
+    ChannelRepository,
+    ContactRepository,
+    MessageRepository,
+)
 
 logger = logging.getLogger(__name__)
 
+
+async def upsert_channel_from_radio_slot(payload: dict, *, on_radio: bool) -> str | None:
+    """Parse a radio channel-slot payload and upsert to the database.
+
+    Returns the uppercase hex key if a channel was upserted, or None if the
+    slot was empty/invalid.
+    """
+    name = payload.get("channel_name", "")
+    secret = payload.get("channel_secret", b"")
+
+    # Skip empty channels
+    if not name or name == "\x00" * len(name):
+        return None
+
+    is_hashtag = name.startswith("#")
+    key_bytes = secret if isinstance(secret, bytes) else bytes(secret)
+    key_hex = key_bytes.hex().upper()
+
+    await ChannelRepository.upsert(
+        key=key_hex,
+        name=name,
+        is_hashtag=is_hashtag,
+        on_radio=on_radio,
+    )
+    return key_hex
+
+
 # Message poll task handle
 _message_poll_task: asyncio.Task | None = None
 
-# Message poll interval in seconds
-MESSAGE_POLL_INTERVAL = 5
+# Message poll interval in seconds (10s gives DM ACKs plenty of time to arrive)
+MESSAGE_POLL_INTERVAL = 10
+
+# Periodic advertisement task handle
+_advert_task: asyncio.Task | None = None
+
+# Default check interval when periodic advertising is disabled (seconds)
+# We still need to periodically check if it's been enabled
+ADVERT_CHECK_INTERVAL = 60
+
+# Minimum allowed advertisement interval (1 hour).
+# Even if the database has a shorter value, we silently refuse to advertise
+# more frequently than this.
+MIN_ADVERT_INTERVAL = 3600
 
 # Counter to pause polling during repeater operations (supports nested pauses)
 _polling_pause_count: int = 0
@@ -59,16 +104,11 @@ _sync_task: asyncio.Task | None = None
 SYNC_INTERVAL = 300
 
 
-async def sync_and_offload_contacts() -> dict:
+async def sync_and_offload_contacts(mc: MeshCore) -> dict:
     """
     Sync contacts from radio to database, then remove them from radio.
     Returns counts of synced and removed contacts.
     """
-    if not radio_manager.is_connected or radio_manager.meshcore is None:
-        logger.warning("Cannot sync contacts: radio not connected")
-        return {"synced": 0, "removed": 0, "error": "Radio not connected"}
-
-    mc = radio_manager.meshcore
     synced = 0
     removed = 0
 
@@ -77,7 +117,16 @@ async def sync_and_offload_contacts() -> dict:
         result = await mc.commands.get_contacts()
 
         if result is None or result.type == EventType.ERROR:
-            logger.error("Failed to get contacts from radio: %s", result)
+            logger.error(
+                "Failed to get contacts from radio: %s. "
+                "If you see this repeatedly, the radio may be visible on the "
+                "serial/TCP/BLE port but not responding to commands. Check for "
+                "another process with the serial port open (other RemoteTerm "
+                "instances, serial monitors, etc.), verify the firmware is "
+                "up-to-date and in client mode (not repeater), or try a "
+                "power cycle.",
+                result,
+            )
             return {"synced": 0, "removed": 0, "error": str(result)}
 
         contacts = result.payload or {}
@@ -89,6 +138,24 @@ async def sync_and_offload_contacts() -> dict:
             await ContactRepository.upsert(
                 Contact.from_radio_dict(public_key, contact_data, on_radio=False)
             )
+            claimed = await MessageRepository.claim_prefix_messages(public_key.lower())
+            if claimed > 0:
+                logger.info(
+                    "Claimed %d prefix DM message(s) for contact %s",
+                    claimed,
+                    public_key[:12],
+                )
+            adv_name = contact_data.get("adv_name")
+            if adv_name:
+                backfilled = await MessageRepository.backfill_channel_sender_key(
+                    public_key, adv_name
+                )
+                if backfilled > 0:
+                    logger.info(
+                        "Backfilled sender_key on %d channel message(s) for %s",
+                        backfilled,
+                        adv_name,
+                    )
             synced += 1
 
             # Remove from radio
@@ -96,6 +163,30 @@ async def sync_and_offload_contacts() -> dict:
                 remove_result = await mc.commands.remove_contact(contact_data)
                 if remove_result.type == EventType.OK:
                     removed += 1
+
+                    # LIBRARY INTERNAL FIXUP: The MeshCore library's
+                    # commands.remove_contact() sends the remove command over
+                    # the wire but does NOT update the library's in-memory
+                    # contact cache (mc._contacts). This is a gap in the
+                    # library — there's no public API to clear a single
+                    # contact from the cache, and the library only refreshes
+                    # it on a full get_contacts() call.
+                    #
+                    # Why this matters: sync_recent_contacts_to_radio() uses
+                    # mc.get_contact_by_key_prefix() to check whether a
+                    # contact is already loaded on the radio. That method
+                    # searches mc._contacts. If we don't evict the removed
+                    # contact from the cache here, get_contact_by_key_prefix()
+                    # will still find it and skip the add_contact() call —
+                    # meaning contacts never get loaded back onto the radio
+                    # after offload. The result: no DM ACKs, degraded routing
+                    # for potentially minutes until the next periodic sync
+                    # refreshes the cache from the (now-empty) radio.
+                    #
+                    # We access mc._contacts directly because the library
+                    # exposes it as a read-only property (mc.contacts) with
+                    # no removal API. The dict is keyed by public_key string.
+                    mc._contacts.pop(public_key, None)
                 else:
                     logger.warning(
                         "Failed to remove contact %s: %s", public_key[:12], remove_result.payload
@@ -112,16 +203,11 @@ async def sync_and_offload_contacts() -> dict:
     return {"synced": synced, "removed": removed}
 
 
-async def sync_and_offload_channels() -> dict:
+async def sync_and_offload_channels(mc: MeshCore) -> dict:
     """
     Sync channels from radio to database, then clear them from radio.
     Returns counts of synced and cleared channels.
     """
-    if not radio_manager.is_connected or radio_manager.meshcore is None:
-        logger.warning("Cannot sync channels: radio not connected")
-        return {"synced": 0, "cleared": 0, "error": "Radio not connected"}
-
-    mc = radio_manager.meshcore
     synced = 0
     cleared = 0
 
@@ -133,29 +219,15 @@ async def sync_and_offload_channels() -> dict:
             if result.type != EventType.CHANNEL_INFO:
                 continue
 
-            payload = result.payload
-            name = payload.get("channel_name", "")
-            secret = payload.get("channel_secret", b"")
-
-            # Skip empty channels
-            if not name or name == "\x00" * len(name) or all(b == 0 for b in secret):
-                continue
-
-            is_hashtag = name.startswith("#")
-
-            # Convert key bytes to hex string
-            key_bytes = secret if isinstance(secret, bytes) else bytes(secret)
-            key_hex = key_bytes.hex().upper()
-
-            # Save to database
-            await ChannelRepository.upsert(
-                key=key_hex,
-                name=name,
-                is_hashtag=is_hashtag,
+            key_hex = await upsert_channel_from_radio_slot(
+                result.payload,
                 on_radio=False,  # We're about to clear it
             )
+            if key_hex is None:
+                continue
+
             synced += 1
-            logger.debug("Synced channel %s: %s", key_hex[:8], name)
+            logger.debug("Synced channel %s: %s", key_hex[:8], result.payload.get("channel_name"))
 
             # Clear from radio (set empty name and zero key)
             try:
@@ -202,33 +274,36 @@ async def ensure_default_channels() -> None:
         )
 
 
-async def sync_and_offload_all() -> dict:
+async def sync_and_offload_all(mc: MeshCore) -> dict:
     """Sync and offload both contacts and channels, then ensure defaults exist."""
     logger.info("Starting full radio sync and offload")
 
-    contacts_result = await sync_and_offload_contacts()
-    channels_result = await sync_and_offload_channels()
+    contacts_result = await sync_and_offload_contacts(mc)
+    channels_result = await sync_and_offload_channels(mc)
 
     # Ensure default channels exist
     await ensure_default_channels()
 
+    # Reload favorites and recent contacts back onto the radio immediately
+    # so favorited contacts don't stay in the on_radio=False limbo until the
+    # next advertisement arrives.  Pass mc directly since the caller already
+    # holds the radio operation lock (asyncio.Lock is not reentrant).
+    reload_result = await sync_recent_contacts_to_radio(force=True, mc=mc)
+
     return {
         "contacts": contacts_result,
         "channels": channels_result,
+        "reloaded": reload_result,
     }
 
 
-async def drain_pending_messages() -> int:
+async def drain_pending_messages(mc: MeshCore) -> int:
     """
     Drain all pending messages from the radio.
 
     Calls get_msg() repeatedly until NO_MORE_MSGS is received.
     Returns the count of messages retrieved.
     """
-    if not radio_manager.is_connected or radio_manager.meshcore is None:
-        return 0
-
-    mc = radio_manager.meshcore
     count = 0
     max_iterations = 100  # Safety limit
 
@@ -250,13 +325,13 @@ async def drain_pending_messages() -> int:
         except asyncio.TimeoutError:
             break
         except Exception as e:
-            logger.debug("Error draining messages: %s", e)
+            logger.warning("Error draining messages: %s", e, exc_info=True)
             break
 
     return count
 
 
-async def poll_for_messages() -> int:
+async def poll_for_messages(mc: MeshCore) -> int:
     """
     Poll the radio for any pending messages (single pass).
 
@@ -265,10 +340,6 @@ async def poll_for_messages() -> int:
 
     Returns the count of messages retrieved.
     """
-    if not radio_manager.is_connected or radio_manager.meshcore is None:
-        return 0
-
-    mc = radio_manager.meshcore
     count = 0
 
     try:
@@ -283,12 +354,12 @@ async def poll_for_messages() -> int:
         elif result.type in (EventType.CONTACT_MSG_RECV, EventType.CHANNEL_MSG_RECV):
             count += 1
             # If we got a message, there might be more - drain them
-            count += await drain_pending_messages()
+            count += await drain_pending_messages(mc)
 
     except asyncio.TimeoutError:
         pass
     except Exception as e:
-        logger.debug("Message poll exception: %s", e)
+        logger.warning("Message poll exception: %s", e, exc_info=True)
 
     return count
 
@@ -299,13 +370,30 @@ async def _message_poll_loop():
         try:
             await asyncio.sleep(MESSAGE_POLL_INTERVAL)
 
+            # Clean up expired pending ACKs every poll cycle so they don't
+            # accumulate when no ACKs arrive (e.g. all recipients out of range).
+            cleanup_expired_acks()
+
             if radio_manager.is_connected and not is_polling_paused():
-                await poll_for_messages()
+                try:
+                    async with radio_manager.radio_operation(
+                        "message_poll_loop",
+                        blocking=False,
+                        suspend_auto_fetch=True,
+                    ) as mc:
+                        count = await poll_for_messages(mc)
+                        if count > 0:
+                            logger.warning(
+                                "Poll loop caught %d message(s) missed by auto-fetch",
+                                count,
+                            )
+                except RadioOperationBusyError:
+                    logger.debug("Skipping message poll: radio busy")
 
         except asyncio.CancelledError:
             break
         except Exception as e:
-            logger.debug("Error in message poll loop: %s", e)
+            logger.warning("Error in message poll loop: %s", e, exc_info=True)
 
 
 def start_message_polling():
@@ -329,16 +417,122 @@ async def stop_message_polling():
         logger.info("Stopped periodic message polling")
 
 
-async def sync_radio_time() -> bool:
+async def send_advertisement(mc: MeshCore, *, force: bool = False) -> bool:
+    """Send an advertisement to announce presence on the mesh.
+
+    Respects the configured advert_interval - won't send if not enough time
+    has elapsed since the last advertisement, unless force=True.
+
+    Args:
+        mc: The MeshCore instance to use for the advertisement.
+        force: If True, send immediately regardless of interval.
+
+    Returns True if successful, False otherwise (including if throttled).
+    """
+    # Check if enough time has elapsed (unless forced)
+    if not force:
+        settings = await AppSettingsRepository.get()
+        interval = settings.advert_interval
+        last_time = settings.last_advert_time
+        now = int(time.time())
+
+        # If interval is 0, advertising is disabled
+        if interval <= 0:
+            logger.debug("Advertisement skipped: periodic advertising is disabled")
+            return False
+
+        # Enforce minimum interval floor
+        interval = max(interval, MIN_ADVERT_INTERVAL)
+
+        # Check if enough time has passed
+        elapsed = now - last_time
+        if elapsed < interval:
+            remaining = interval - elapsed
+            logger.debug(
+                "Advertisement throttled: %d seconds remaining (interval=%d, elapsed=%d)",
+                remaining,
+                interval,
+                elapsed,
+            )
+            return False
+
+    try:
+        result = await mc.commands.send_advert(flood=True)
+        if result.type == EventType.OK:
+            # Update last_advert_time in database
+            now = int(time.time())
+            await AppSettingsRepository.update(last_advert_time=now)
+            logger.info("Advertisement sent successfully")
+            return True
+        else:
+            logger.warning("Failed to send advertisement: %s", result.payload)
+            return False
+    except Exception as e:
+        logger.warning("Error sending advertisement: %s", e)
+        return False
+
+
+async def _periodic_advert_loop():
+    """Background task that periodically checks if an advertisement should be sent.
+
+    The actual throttling logic is in send_advertisement(), which checks
+    last_advert_time from the database. This loop just triggers the check
+    periodically and sleeps between attempts.
+    """
+    while True:
+        try:
+            await asyncio.sleep(ADVERT_CHECK_INTERVAL)
+
+            # Try to send - send_advertisement() handles all checks
+            # (disabled, throttled, not connected)
+            if radio_manager.is_connected:
+                try:
+                    async with radio_manager.radio_operation(
+                        "periodic_advertisement",
+                        blocking=False,
+                    ) as mc:
+                        await send_advertisement(mc)
+                except RadioOperationBusyError:
+                    logger.debug("Skipping periodic advertisement: radio busy")
+
+        except asyncio.CancelledError:
+            logger.info("Periodic advertisement task cancelled")
+            break
+        except Exception as e:
+            logger.error("Error in periodic advertisement loop: %s", e)
+            await asyncio.sleep(ADVERT_CHECK_INTERVAL)
+
+
+def start_periodic_advert():
+    """Start the periodic advertisement background task.
+
+    The task reads interval from app_settings dynamically, so it will
+    adapt to configuration changes without restart.
+    """
+    global _advert_task
+    if _advert_task is None or _advert_task.done():
+        _advert_task = asyncio.create_task(_periodic_advert_loop())
+        logger.info("Started periodic advertisement task (interval configured in settings)")
+
+
+async def stop_periodic_advert():
+    """Stop the periodic advertisement background task."""
+    global _advert_task
+    if _advert_task and not _advert_task.done():
+        _advert_task.cancel()
+        try:
+            await _advert_task
+        except asyncio.CancelledError:
+            pass
+        _advert_task = None
+        logger.info("Stopped periodic advertisement")
+
+
+async def sync_radio_time(mc: MeshCore) -> bool:
     """Sync the radio's clock with the system time.
 
     Returns True if successful, False otherwise.
     """
-    mc = radio_manager.meshcore
-    if not mc:
-        logger.debug("Cannot sync time: radio not connected")
-        return False
-
     try:
         now = int(time.time())
         await mc.commands.set_time(now)
@@ -354,9 +548,19 @@ async def _periodic_sync_loop():
     while True:
         try:
             await asyncio.sleep(SYNC_INTERVAL)
-            logger.debug("Running periodic radio sync")
-            await sync_and_offload_all()
-            await sync_radio_time()
+            if not radio_manager.is_connected:
+                continue
+
+            try:
+                async with radio_manager.radio_operation(
+                    "periodic_sync",
+                    blocking=False,
+                ) as mc:
+                    logger.debug("Running periodic radio sync")
+                    await sync_and_offload_all(mc)
+                    await sync_radio_time(mc)
+            except RadioOperationBusyError:
+                logger.debug("Skipping periodic sync: radio busy")
         except asyncio.CancelledError:
             logger.info("Periodic sync task cancelled")
             break
@@ -390,13 +594,130 @@ _last_contact_sync: float = 0.0
 CONTACT_SYNC_THROTTLE_SECONDS = 30  # Don't sync more than once per 30 seconds
 
 
-async def sync_recent_contacts_to_radio(force: bool = False) -> dict:
+async def _sync_contacts_to_radio_inner(mc: MeshCore) -> dict:
     """
-    Load recent non-repeater contacts to the radio for DM ACK support.
+    Core logic for loading contacts onto the radio.
 
-    This ensures the radio can auto-ACK incoming DMs from recent contacts.
+    Favorite contacts are prioritized first, then recent non-repeater contacts
+    fill remaining slots up to max_radio_contacts.
+
+    Caller must hold the radio operation lock and pass a valid MeshCore instance.
+    """
+    app_settings = await AppSettingsRepository.get()
+    max_contacts = app_settings.max_radio_contacts
+    selected_contacts: list[Contact] = []
+    selected_keys: set[str] = set()
+
+    favorite_contacts_loaded = 0
+    for favorite in app_settings.favorites:
+        if favorite.type != "contact":
+            continue
+        try:
+            contact = await ContactRepository.get_by_key_or_prefix(favorite.id)
+        except AmbiguousPublicKeyPrefixError:
+            logger.warning(
+                "Skipping favorite contact '%s': ambiguous key prefix; use full key",
+                favorite.id,
+            )
+            continue
+        if not contact:
+            continue
+        key = contact.public_key.lower()
+        if key in selected_keys:
+            continue
+        selected_keys.add(key)
+        selected_contacts.append(contact)
+        favorite_contacts_loaded += 1
+        if len(selected_contacts) >= max_contacts:
+            break
+
+    if len(selected_contacts) < max_contacts:
+        recent_contacts = await ContactRepository.get_recent_non_repeaters(limit=max_contacts)
+        for contact in recent_contacts:
+            key = contact.public_key.lower()
+            if key in selected_keys:
+                continue
+            selected_keys.add(key)
+            selected_contacts.append(contact)
+            if len(selected_contacts) >= max_contacts:
+                break
+
+    logger.debug(
+        "Selected %d contacts to sync (%d favorite contacts first, limit=%d)",
+        len(selected_contacts),
+        favorite_contacts_loaded,
+        max_contacts,
+    )
+
+    loaded = 0
+    already_on_radio = 0
+    failed = 0
+
+    for contact in selected_contacts:
+        # Check if already on radio
+        radio_contact = mc.get_contact_by_key_prefix(contact.public_key[:12])
+        if radio_contact:
+            already_on_radio += 1
+            # Update DB if not marked as on_radio
+            if not contact.on_radio:
+                await ContactRepository.set_on_radio(contact.public_key, True)
+            continue
+
+        try:
+            result = await mc.commands.add_contact(contact.to_radio_dict())
+            if result.type == EventType.OK:
+                loaded += 1
+                await ContactRepository.set_on_radio(contact.public_key, True)
+                logger.debug("Loaded contact %s to radio", contact.public_key[:12])
+            else:
+                failed += 1
+                reason = result.payload
+                hint = ""
+                if reason is None:
+                    hint = (
+                        " (no response from radio — if this repeats, check for "
+                        "serial port contention from another process or try a "
+                        "power cycle)"
+                    )
+                logger.warning(
+                    "Failed to load contact %s: %s%s",
+                    contact.public_key[:12],
+                    reason,
+                    hint,
+                )
+        except Exception as e:
+            failed += 1
+            logger.warning("Error loading contact %s: %s", contact.public_key[:12], e)
+
+    if loaded > 0 or failed > 0:
+        logger.info(
+            "Contact sync: loaded %d, already on radio %d, failed %d",
+            loaded,
+            already_on_radio,
+            failed,
+        )
+
+    return {
+        "loaded": loaded,
+        "already_on_radio": already_on_radio,
+        "failed": failed,
+    }
+
+
+async def sync_recent_contacts_to_radio(force: bool = False, mc: MeshCore | None = None) -> dict:
+    """
+    Load contacts to the radio for DM ACK support.
+
+    Favorite contacts are prioritized first, then recent non-repeater contacts
+    fill remaining slots up to max_radio_contacts.
     Only runs at most once every CONTACT_SYNC_THROTTLE_SECONDS unless forced.
 
+    Args:
+        force: Skip the throttle check.
+        mc: Optional MeshCore instance. When provided, the caller already holds
+            the radio operation lock and the inner logic runs directly.
+            When None, this function acquires its own lock.
+
     Returns counts of contacts loaded.
     """
     global _last_contact_sync
@@ -407,61 +728,25 @@ async def sync_recent_contacts_to_radio(force: bool = False) -> dict:
         logger.debug("Contact sync throttled (last sync %ds ago)", int(now - _last_contact_sync))
         return {"loaded": 0, "throttled": True}
 
+    # If caller provided a MeshCore instance, use it directly (caller holds the lock)
+    if mc is not None:
+        _last_contact_sync = now
+        return await _sync_contacts_to_radio_inner(mc)
+
     if not radio_manager.is_connected or radio_manager.meshcore is None:
         logger.debug("Cannot sync contacts to radio: not connected")
         return {"loaded": 0, "error": "Radio not connected"}
 
-    mc = radio_manager.meshcore
-    _last_contact_sync = now
-
     try:
-        # Get recent non-repeater contacts from database
-        max_contacts = settings.max_radio_contacts
-        contacts = await ContactRepository.get_recent_non_repeaters(limit=max_contacts)
-        logger.debug("Found %d recent non-repeater contacts to sync", len(contacts))
-
-        loaded = 0
-        already_on_radio = 0
-        failed = 0
-
-        for contact in contacts:
-            # Check if already on radio
-            radio_contact = mc.get_contact_by_key_prefix(contact.public_key[:12])
-            if radio_contact:
-                already_on_radio += 1
-                # Update DB if not marked as on_radio
-                if not contact.on_radio:
-                    await ContactRepository.set_on_radio(contact.public_key, True)
-                continue
-
-            try:
-                result = await mc.commands.add_contact(contact.to_radio_dict())
-                if result.type == EventType.OK:
-                    loaded += 1
-                    await ContactRepository.set_on_radio(contact.public_key, True)
-                    logger.debug("Loaded contact %s to radio", contact.public_key[:12])
-                else:
-                    failed += 1
-                    logger.warning(
-                        "Failed to load contact %s: %s", contact.public_key[:12], result.payload
-                    )
-            except Exception as e:
-                failed += 1
-                logger.warning("Error loading contact %s: %s", contact.public_key[:12], e)
-
-        if loaded > 0 or failed > 0:
-            logger.info(
-                "Contact sync: loaded %d, already on radio %d, failed %d",
-                loaded,
-                already_on_radio,
-                failed,
-            )
-
-        return {
-            "loaded": loaded,
-            "already_on_radio": already_on_radio,
-            "failed": failed,
-        }
+        async with radio_manager.radio_operation(
+            "sync_recent_contacts_to_radio",
+            blocking=False,
+        ) as mc:
+            _last_contact_sync = now
+            return await _sync_contacts_to_radio_inner(mc)
+    except RadioOperationBusyError:
+        logger.debug("Skipping contact sync to radio: radio busy")
+        return {"loaded": 0, "busy": True}
 
     except Exception as e:
         logger.error("Error syncing contacts to radio: %s", e)

app/repository.py

@@ -1,894 +0,0 @@
-import json
-import logging
-import sqlite3
-import time
-from hashlib import sha256
-from typing import Any, Literal
-
-from app.database import db
-from app.decoder import PayloadType, extract_payload, get_packet_payload_type
-from app.models import AppSettings, Channel, Contact, Favorite, Message, MessagePath, RawPacket
-
-logger = logging.getLogger(__name__)
-
-
-class ContactRepository:
-    @staticmethod
-    async def upsert(contact: dict[str, Any]) -> None:
-        await db.conn.execute(
-            """
-            INSERT INTO contacts (public_key, name, type, flags, last_path, last_path_len,
-                                  last_advert, lat, lon, last_seen, on_radio, last_contacted)
-            VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
-            ON CONFLICT(public_key) DO UPDATE SET
-                name = COALESCE(excluded.name, contacts.name),
-                type = CASE WHEN excluded.type = 0 THEN contacts.type ELSE excluded.type END,
-                flags = excluded.flags,
-                last_path = COALESCE(excluded.last_path, contacts.last_path),
-                last_path_len = excluded.last_path_len,
-                last_advert = COALESCE(excluded.last_advert, contacts.last_advert),
-                lat = COALESCE(excluded.lat, contacts.lat),
-                lon = COALESCE(excluded.lon, contacts.lon),
-                last_seen = excluded.last_seen,
-                on_radio = excluded.on_radio,
-                last_contacted = COALESCE(excluded.last_contacted, contacts.last_contacted)
-            """,
-            (
-                contact.get("public_key"),
-                contact.get("name") or contact.get("adv_name"),
-                contact.get("type", 0),
-                contact.get("flags", 0),
-                contact.get("last_path") or contact.get("out_path"),
-                contact.get("last_path_len")
-                if "last_path_len" in contact
-                else contact.get("out_path_len", -1),
-                contact.get("last_advert"),
-                contact.get("lat") or contact.get("adv_lat"),
-                contact.get("lon") or contact.get("adv_lon"),
-                contact.get("last_seen", int(time.time())),
-                contact.get("on_radio", False),
-                contact.get("last_contacted"),
-            ),
-        )
-        await db.conn.commit()
-
-    @staticmethod
-    def _row_to_contact(row) -> Contact:
-        """Convert a database row to a Contact model."""
-        return Contact(
-            public_key=row["public_key"],
-            name=row["name"],
-            type=row["type"],
-            flags=row["flags"],
-            last_path=row["last_path"],
-            last_path_len=row["last_path_len"],
-            last_advert=row["last_advert"],
-            lat=row["lat"],
-            lon=row["lon"],
-            last_seen=row["last_seen"],
-            on_radio=bool(row["on_radio"]),
-            last_contacted=row["last_contacted"],
-            last_read_at=row["last_read_at"],
-        )
-
-    @staticmethod
-    async def get_by_key(public_key: str) -> Contact | None:
-        cursor = await db.conn.execute("SELECT * FROM contacts WHERE public_key = ?", (public_key,))
-        row = await cursor.fetchone()
-        return ContactRepository._row_to_contact(row) if row else None
-
-    @staticmethod
-    async def get_by_key_prefix(prefix: str) -> Contact | None:
-        cursor = await db.conn.execute(
-            "SELECT * FROM contacts WHERE public_key LIKE ? LIMIT 1",
-            (f"{prefix}%",),
-        )
-        row = await cursor.fetchone()
-        return ContactRepository._row_to_contact(row) if row else None
-
-    @staticmethod
-    async def get_by_key_or_prefix(key_or_prefix: str) -> Contact | None:
-        """Get a contact by exact key match, falling back to prefix match.
-
-        Useful when the input might be a full 64-char public key or a shorter prefix.
-        """
-        contact = await ContactRepository.get_by_key(key_or_prefix)
-        if not contact:
-            contact = await ContactRepository.get_by_key_prefix(key_or_prefix)
-        return contact
-
-    @staticmethod
-    async def get_all(limit: int = 100, offset: int = 0) -> list[Contact]:
-        cursor = await db.conn.execute(
-            "SELECT * FROM contacts ORDER BY COALESCE(name, public_key) LIMIT ? OFFSET ?",
-            (limit, offset),
-        )
-        rows = await cursor.fetchall()
-        return [ContactRepository._row_to_contact(row) for row in rows]
-
-    @staticmethod
-    async def get_recent_non_repeaters(limit: int = 200) -> list[Contact]:
-        """Get the most recently active non-repeater contacts.
-
-        Orders by most recent activity (last_contacted or last_advert),
-        excluding repeaters (type=2).
-        """
-        cursor = await db.conn.execute(
-            """
-            SELECT * FROM contacts
-            WHERE type != 2
-            ORDER BY COALESCE(last_contacted, 0) DESC, COALESCE(last_advert, 0) DESC
-            LIMIT ?
-            """,
-            (limit,),
-        )
-        rows = await cursor.fetchall()
-        return [ContactRepository._row_to_contact(row) for row in rows]
-
-    @staticmethod
-    async def update_path(public_key: str, path: str, path_len: int) -> None:
-        await db.conn.execute(
-            "UPDATE contacts SET last_path = ?, last_path_len = ?, last_seen = ? WHERE public_key = ?",
-            (path, path_len, int(time.time()), public_key),
-        )
-        await db.conn.commit()
-
-    @staticmethod
-    async def set_on_radio(public_key: str, on_radio: bool) -> None:
-        await db.conn.execute(
-            "UPDATE contacts SET on_radio = ? WHERE public_key = ?",
-            (on_radio, public_key),
-        )
-        await db.conn.commit()
-
-    @staticmethod
-    async def delete(public_key: str) -> None:
-        await db.conn.execute(
-            "DELETE FROM contacts WHERE public_key = ?",
-            (public_key,),
-        )
-        await db.conn.commit()
-
-    @staticmethod
-    async def update_last_contacted(public_key: str, timestamp: int | None = None) -> None:
-        """Update the last_contacted timestamp for a contact."""
-        ts = timestamp or int(time.time())
-        await db.conn.execute(
-            "UPDATE contacts SET last_contacted = ?, last_seen = ? WHERE public_key = ?",
-            (ts, ts, public_key),
-        )
-        await db.conn.commit()
-
-    @staticmethod
-    async def clear_all_on_radio() -> None:
-        """Clear the on_radio flag for all contacts."""
-        await db.conn.execute("UPDATE contacts SET on_radio = 0")
-        await db.conn.commit()
-
-    @staticmethod
-    async def set_multiple_on_radio(public_keys: list[str], on_radio: bool = True) -> None:
-        """Set on_radio flag for multiple contacts."""
-        if not public_keys:
-            return
-        placeholders = ",".join("?" * len(public_keys))
-        await db.conn.execute(
-            f"UPDATE contacts SET on_radio = ? WHERE public_key IN ({placeholders})",
-            [on_radio] + public_keys,
-        )
-        await db.conn.commit()
-
-    @staticmethod
-    async def update_last_read_at(public_key: str, timestamp: int | None = None) -> bool:
-        """Update the last_read_at timestamp for a contact.
-
-        Returns True if a row was updated, False if contact not found.
-        """
-        ts = timestamp or int(time.time())
-        cursor = await db.conn.execute(
-            "UPDATE contacts SET last_read_at = ? WHERE public_key = ?",
-            (ts, public_key),
-        )
-        await db.conn.commit()
-        return cursor.rowcount > 0
-
-
-class ChannelRepository:
-    @staticmethod
-    async def upsert(key: str, name: str, is_hashtag: bool = False, on_radio: bool = False) -> None:
-        """Upsert a channel. Key is 32-char hex string."""
-        await db.conn.execute(
-            """
-            INSERT INTO channels (key, name, is_hashtag, on_radio)
-            VALUES (?, ?, ?, ?)
-            ON CONFLICT(key) DO UPDATE SET
-                name = excluded.name,
-                is_hashtag = excluded.is_hashtag,
-                on_radio = excluded.on_radio
-            """,
-            (key.upper(), name, is_hashtag, on_radio),
-        )
-        await db.conn.commit()
-
-    @staticmethod
-    async def get_by_key(key: str) -> Channel | None:
-        """Get a channel by its key (32-char hex string)."""
-        cursor = await db.conn.execute(
-            "SELECT key, name, is_hashtag, on_radio, last_read_at FROM channels WHERE key = ?",
-            (key.upper(),),
-        )
-        row = await cursor.fetchone()
-        if row:
-            return Channel(
-                key=row["key"],
-                name=row["name"],
-                is_hashtag=bool(row["is_hashtag"]),
-                on_radio=bool(row["on_radio"]),
-                last_read_at=row["last_read_at"],
-            )
-        return None
-
-    @staticmethod
-    async def get_all() -> list[Channel]:
-        cursor = await db.conn.execute(
-            "SELECT key, name, is_hashtag, on_radio, last_read_at FROM channels ORDER BY name"
-        )
-        rows = await cursor.fetchall()
-        return [
-            Channel(
-                key=row["key"],
-                name=row["name"],
-                is_hashtag=bool(row["is_hashtag"]),
-                on_radio=bool(row["on_radio"]),
-                last_read_at=row["last_read_at"],
-            )
-            for row in rows
-        ]
-
-    @staticmethod
-    async def get_by_name(name: str) -> Channel | None:
-        """Get a channel by name."""
-        cursor = await db.conn.execute(
-            "SELECT key, name, is_hashtag, on_radio, last_read_at FROM channels WHERE name = ?",
-            (name,),
-        )
-        row = await cursor.fetchone()
-        if row:
-            return Channel(
-                key=row["key"],
-                name=row["name"],
-                is_hashtag=bool(row["is_hashtag"]),
-                on_radio=bool(row["on_radio"]),
-                last_read_at=row["last_read_at"],
-            )
-        return None
-
-    @staticmethod
-    async def delete(key: str) -> None:
-        """Delete a channel by key."""
-        await db.conn.execute(
-            "DELETE FROM channels WHERE key = ?",
-            (key.upper(),),
-        )
-        await db.conn.commit()
-
-    @staticmethod
-    async def update_last_read_at(key: str, timestamp: int | None = None) -> bool:
-        """Update the last_read_at timestamp for a channel.
-
-        Returns True if a row was updated, False if channel not found.
-        """
-        ts = timestamp or int(time.time())
-        cursor = await db.conn.execute(
-            "UPDATE channels SET last_read_at = ? WHERE key = ?",
-            (ts, key.upper()),
-        )
-        await db.conn.commit()
-        return cursor.rowcount > 0
-
-
-class MessageRepository:
-    @staticmethod
-    def _parse_paths(paths_json: str | None) -> list[MessagePath] | None:
-        """Parse paths JSON string to list of MessagePath objects."""
-        if not paths_json:
-            return None
-        try:
-            paths_data = json.loads(paths_json)
-            return [MessagePath(**p) for p in paths_data]
-        except (json.JSONDecodeError, TypeError, KeyError):
-            return None
-
-    @staticmethod
-    def _serialize_paths(paths: list[dict] | None) -> str | None:
-        """Serialize paths list to JSON string."""
-        if not paths:
-            return None
-        return json.dumps(paths)
-
-    @staticmethod
-    async def create(
-        msg_type: str,
-        text: str,
-        received_at: int,
-        conversation_key: str,
-        sender_timestamp: int | None = None,
-        path: str | None = None,
-        txt_type: int = 0,
-        signature: str | None = None,
-        outgoing: bool = False,
-    ) -> int | None:
-        """Create a message, returning the ID or None if duplicate.
-
-        Uses INSERT OR IGNORE to handle the UNIQUE constraint on
-        (type, conversation_key, text, sender_timestamp). This prevents
-        duplicate messages when the same message arrives via multiple RF paths.
-
-        The path parameter is converted to the paths JSON array format.
-        """
-        # Convert single path to paths array format
-        paths_json = None
-        if path is not None:
-            paths_json = json.dumps([{"path": path, "received_at": received_at}])
-
-        cursor = await db.conn.execute(
-            """
-            INSERT OR IGNORE INTO messages (type, conversation_key, text, sender_timestamp,
-                                            received_at, paths, txt_type, signature, outgoing)
-            VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)
-            """,
-            (
-                msg_type,
-                conversation_key,
-                text,
-                sender_timestamp,
-                received_at,
-                paths_json,
-                txt_type,
-                signature,
-                outgoing,
-            ),
-        )
-        await db.conn.commit()
-        # rowcount is 0 if INSERT was ignored due to UNIQUE constraint violation
-        if cursor.rowcount == 0:
-            return None
-        return cursor.lastrowid
-
-    @staticmethod
-    async def add_path(
-        message_id: int, path: str, received_at: int | None = None
-    ) -> list[MessagePath]:
-        """Add a new path to an existing message.
-
-        This is used when a repeat/echo of a message arrives via a different route.
-        Returns the updated list of paths.
-        """
-        ts = received_at or int(time.time())
-
-        # Get current paths
-        cursor = await db.conn.execute("SELECT paths FROM messages WHERE id = ?", (message_id,))
-        row = await cursor.fetchone()
-        if not row:
-            return []
-
-        # Parse existing paths or start with empty list
-        existing_paths = []
-        if row["paths"]:
-            try:
-                existing_paths = json.loads(row["paths"])
-            except json.JSONDecodeError:
-                existing_paths = []
-
-        # Add new path
-        existing_paths.append({"path": path, "received_at": ts})
-
-        # Update database
-        paths_json = json.dumps(existing_paths)
-        await db.conn.execute(
-            "UPDATE messages SET paths = ? WHERE id = ?",
-            (paths_json, message_id),
-        )
-        await db.conn.commit()
-
-        return [MessagePath(**p) for p in existing_paths]
-
-    @staticmethod
-    async def get_all(
-        limit: int = 100,
-        offset: int = 0,
-        msg_type: str | None = None,
-        conversation_key: str | None = None,
-    ) -> list[Message]:
-        query = "SELECT * FROM messages WHERE 1=1"
-        params: list[Any] = []
-
-        if msg_type:
-            query += " AND type = ?"
-            params.append(msg_type)
-        if conversation_key:
-            # Support both exact match and prefix match for DMs
-            query += " AND conversation_key LIKE ?"
-            params.append(f"{conversation_key}%")
-
-        query += " ORDER BY received_at DESC LIMIT ? OFFSET ?"
-        params.extend([limit, offset])
-
-        cursor = await db.conn.execute(query, params)
-        rows = await cursor.fetchall()
-        return [
-            Message(
-                id=row["id"],
-                type=row["type"],
-                conversation_key=row["conversation_key"],
-                text=row["text"],
-                sender_timestamp=row["sender_timestamp"],
-                received_at=row["received_at"],
-                paths=MessageRepository._parse_paths(row["paths"]),
-                txt_type=row["txt_type"],
-                signature=row["signature"],
-                outgoing=bool(row["outgoing"]),
-                acked=row["acked"],
-            )
-            for row in rows
-        ]
-
-    @staticmethod
-    async def increment_ack_count(message_id: int) -> int:
-        """Increment ack count and return the new value."""
-        await db.conn.execute("UPDATE messages SET acked = acked + 1 WHERE id = ?", (message_id,))
-        await db.conn.commit()
-        cursor = await db.conn.execute("SELECT acked FROM messages WHERE id = ?", (message_id,))
-        row = await cursor.fetchone()
-        return row["acked"] if row else 1
-
-    @staticmethod
-    async def get_ack_count(message_id: int) -> int:
-        """Get the current ack count for a message."""
-        cursor = await db.conn.execute("SELECT acked FROM messages WHERE id = ?", (message_id,))
-        row = await cursor.fetchone()
-        return row["acked"] if row else 0
-
-    @staticmethod
-    async def get_by_content(
-        msg_type: str,
-        conversation_key: str,
-        text: str,
-        sender_timestamp: int | None,
-    ) -> "Message | None":
-        """Look up a message by its unique content fields."""
-        cursor = await db.conn.execute(
-            """
-            SELECT id, type, conversation_key, text, sender_timestamp, received_at,
-                   paths, txt_type, signature, outgoing, acked
-            FROM messages
-            WHERE type = ? AND conversation_key = ? AND text = ?
-              AND (sender_timestamp = ? OR (sender_timestamp IS NULL AND ? IS NULL))
-            """,
-            (msg_type, conversation_key, text, sender_timestamp, sender_timestamp),
-        )
-        row = await cursor.fetchone()
-        if not row:
-            return None
-
-        paths = None
-        if row["paths"]:
-            try:
-                paths_data = json.loads(row["paths"])
-                paths = [
-                    MessagePath(path=p["path"], received_at=p["received_at"]) for p in paths_data
-                ]
-            except (json.JSONDecodeError, KeyError):
-                pass
-
-        return Message(
-            id=row["id"],
-            type=row["type"],
-            conversation_key=row["conversation_key"],
-            text=row["text"],
-            sender_timestamp=row["sender_timestamp"],
-            received_at=row["received_at"],
-            paths=paths,
-            txt_type=row["txt_type"],
-            signature=row["signature"],
-            outgoing=bool(row["outgoing"]),
-            acked=row["acked"],
-        )
-
-    @staticmethod
-    async def get_bulk(
-        conversations: list[dict],
-        limit_per_conversation: int = 100,
-    ) -> dict[str, list["Message"]]:
-        """Fetch messages for multiple conversations in one query per conversation.
-
-        Args:
-            conversations: List of {type: 'PRIV'|'CHAN', conversation_key: string}
-            limit_per_conversation: Max messages to return per conversation
-
-        Returns:
-            Dict mapping 'type:conversation_key' to list of messages
-        """
-        result: dict[str, list[Message]] = {}
-
-        for conv in conversations:
-            msg_type = conv.get("type")
-            conv_key = conv.get("conversation_key")
-            if not msg_type or not conv_key:
-                continue
-
-            key = f"{msg_type}:{conv_key}"
-
-            cursor = await db.conn.execute(
-                """
-                SELECT * FROM messages
-                WHERE type = ? AND conversation_key LIKE ?
-                ORDER BY received_at DESC
-                LIMIT ?
-                """,
-                (msg_type, f"{conv_key}%", limit_per_conversation),
-            )
-            rows = await cursor.fetchall()
-            result[key] = [
-                Message(
-                    id=row["id"],
-                    type=row["type"],
-                    conversation_key=row["conversation_key"],
-                    text=row["text"],
-                    sender_timestamp=row["sender_timestamp"],
-                    received_at=row["received_at"],
-                    paths=MessageRepository._parse_paths(row["paths"]),
-                    txt_type=row["txt_type"],
-                    signature=row["signature"],
-                    outgoing=bool(row["outgoing"]),
-                    acked=row["acked"],
-                )
-                for row in rows
-            ]
-
-        return result
-
-
-class RawPacketRepository:
-    @staticmethod
-    async def create(data: bytes, timestamp: int | None = None) -> tuple[int, bool]:
-        """
-        Create a raw packet with payload-based deduplication.
-
-        Returns (packet_id, is_new) tuple:
-        - is_new=True: New packet stored, packet_id is the new row ID
-        - is_new=False: Duplicate payload detected, packet_id is the existing row ID
-
-        Deduplication is based on the SHA-256 hash of the packet payload
-        (excluding routing/path information).
-        """
-        ts = timestamp or int(time.time())
-
-        # Compute payload hash for deduplication
-        payload = extract_payload(data)
-        if payload:
-            payload_hash = sha256(payload).hexdigest()
-        else:
-            # For malformed packets, hash the full data
-            payload_hash = sha256(data).hexdigest()
-
-        # Check if this payload already exists
-        cursor = await db.conn.execute(
-            "SELECT id FROM raw_packets WHERE payload_hash = ?", (payload_hash,)
-        )
-        existing = await cursor.fetchone()
-
-        if existing:
-            # Duplicate - return existing packet ID
-            logger.debug(
-                "Duplicate payload detected (hash=%s..., existing_id=%d)",
-                payload_hash[:12],
-                existing["id"],
-            )
-            return (existing["id"], False)
-
-        # New packet - insert with hash
-        try:
-            cursor = await db.conn.execute(
-                "INSERT INTO raw_packets (timestamp, data, payload_hash) VALUES (?, ?, ?)",
-                (ts, data, payload_hash),
-            )
-            await db.conn.commit()
-            assert cursor.lastrowid is not None  # INSERT always returns a row ID
-            return (cursor.lastrowid, True)
-        except sqlite3.IntegrityError:
-            # Race condition: another insert with same payload_hash happened between
-            # our SELECT and INSERT. This is expected for duplicate packets arriving
-            # close together. Query again to get the existing ID.
-            logger.debug(
-                "Duplicate packet detected via race condition (payload_hash=%s), dropping",
-                payload_hash[:16],
-            )
-            cursor = await db.conn.execute(
-                "SELECT id FROM raw_packets WHERE payload_hash = ?", (payload_hash,)
-            )
-            existing = await cursor.fetchone()
-            if existing:
-                return (existing["id"], False)
-            # This shouldn't happen, but if it does, re-raise
-            raise
-
-    @staticmethod
-    async def get_undecrypted_count() -> int:
-        """Get count of undecrypted packets (those without a linked message)."""
-        cursor = await db.conn.execute(
-            "SELECT COUNT(*) as count FROM raw_packets WHERE message_id IS NULL"
-        )
-        row = await cursor.fetchone()
-        return row["count"] if row else 0
-
-    @staticmethod
-    async def get_oldest_undecrypted() -> int | None:
-        """Get timestamp of oldest undecrypted packet, or None if none exist."""
-        cursor = await db.conn.execute(
-            "SELECT MIN(timestamp) as oldest FROM raw_packets WHERE message_id IS NULL"
-        )
-        row = await cursor.fetchone()
-        return row["oldest"] if row and row["oldest"] is not None else None
-
-    @staticmethod
-    async def get_all_undecrypted() -> list[tuple[int, bytes, int]]:
-        """Get all undecrypted packets as (id, data, timestamp) tuples."""
-        cursor = await db.conn.execute(
-            "SELECT id, data, timestamp FROM raw_packets WHERE message_id IS NULL ORDER BY timestamp ASC"
-        )
-        rows = await cursor.fetchall()
-        return [(row["id"], bytes(row["data"]), row["timestamp"]) for row in rows]
-
-    @staticmethod
-    async def mark_decrypted(packet_id: int, message_id: int) -> None:
-        """Link a raw packet to its decrypted message."""
-        await db.conn.execute(
-            "UPDATE raw_packets SET message_id = ? WHERE id = ?",
-            (message_id, packet_id),
-        )
-        await db.conn.commit()
-
-    @staticmethod
-    async def get_undecrypted(limit: int = 100) -> list[RawPacket]:
-        """Get undecrypted packets (those without a linked message)."""
-        cursor = await db.conn.execute(
-            """
-            SELECT id, timestamp, data, message_id FROM raw_packets
-            WHERE message_id IS NULL
-            ORDER BY timestamp DESC
-            LIMIT ?
-            """,
-            (limit,),
-        )
-        rows = await cursor.fetchall()
-        return [
-            RawPacket(
-                id=row["id"],
-                timestamp=row["timestamp"],
-                data=row["data"].hex(),
-                message_id=row["message_id"],
-            )
-            for row in rows
-        ]
-
-    @staticmethod
-    async def prune_old_undecrypted(max_age_days: int) -> int:
-        """Delete undecrypted packets older than max_age_days. Returns count deleted."""
-        cutoff = int(time.time()) - (max_age_days * 86400)
-        cursor = await db.conn.execute(
-            "DELETE FROM raw_packets WHERE message_id IS NULL AND timestamp < ?",
-            (cutoff,),
-        )
-        await db.conn.commit()
-        return cursor.rowcount
-
-    @staticmethod
-    async def get_undecrypted_text_messages() -> list[tuple[int, bytes, int]]:
-        """Get all undecrypted TEXT_MESSAGE packets as (id, data, timestamp) tuples.
-
-        Filters raw packets to only include those with PayloadType.TEXT_MESSAGE (0x02).
-        These are direct messages that can be decrypted with contact ECDH keys.
-        """
-        cursor = await db.conn.execute(
-            "SELECT id, data, timestamp FROM raw_packets WHERE message_id IS NULL ORDER BY timestamp ASC"
-        )
-        rows = await cursor.fetchall()
-
-        # Filter for TEXT_MESSAGE packets
-        result = []
-        for row in rows:
-            data = bytes(row["data"])
-            payload_type = get_packet_payload_type(data)
-            if payload_type == PayloadType.TEXT_MESSAGE:
-                result.append((row["id"], data, row["timestamp"]))
-
-        return result
-
-
-class AppSettingsRepository:
-    """Repository for app_settings table (single-row pattern)."""
-
-    @staticmethod
-    async def get() -> AppSettings:
-        """Get the current app settings.
-
-        Always returns settings - creates default row if needed (migration handles initial row).
-        """
-        cursor = await db.conn.execute(
-            """
-            SELECT max_radio_contacts, favorites, auto_decrypt_dm_on_advert,
-                   sidebar_sort_order, last_message_times, preferences_migrated
-            FROM app_settings WHERE id = 1
-            """
-        )
-        row = await cursor.fetchone()
-
-        if not row:
-            # Should not happen after migration, but handle gracefully
-            return AppSettings()
-
-        # Parse favorites JSON
-        favorites = []
-        if row["favorites"]:
-            try:
-                favorites_data = json.loads(row["favorites"])
-                favorites = [Favorite(**f) for f in favorites_data]
-            except (json.JSONDecodeError, TypeError, KeyError) as e:
-                logger.warning(
-                    "Failed to parse favorites JSON, using empty list: %s (data=%r)",
-                    e,
-                    row["favorites"][:100] if row["favorites"] else None,
-                )
-                favorites = []
-
-        # Parse last_message_times JSON
-        last_message_times: dict[str, int] = {}
-        if row["last_message_times"]:
-            try:
-                last_message_times = json.loads(row["last_message_times"])
-            except (json.JSONDecodeError, TypeError) as e:
-                logger.warning(
-                    "Failed to parse last_message_times JSON, using empty dict: %s",
-                    e,
-                )
-                last_message_times = {}
-
-        # Validate sidebar_sort_order (fallback to "recent" if invalid)
-        sort_order = row["sidebar_sort_order"]
-        if sort_order not in ("recent", "alpha"):
-            sort_order = "recent"
-
-        return AppSettings(
-            max_radio_contacts=row["max_radio_contacts"],
-            favorites=favorites,
-            auto_decrypt_dm_on_advert=bool(row["auto_decrypt_dm_on_advert"]),
-            sidebar_sort_order=sort_order,
-            last_message_times=last_message_times,
-            preferences_migrated=bool(row["preferences_migrated"]),
-        )
-
-    @staticmethod
-    async def update(
-        max_radio_contacts: int | None = None,
-        favorites: list[Favorite] | None = None,
-        auto_decrypt_dm_on_advert: bool | None = None,
-        sidebar_sort_order: str | None = None,
-        last_message_times: dict[str, int] | None = None,
-        preferences_migrated: bool | None = None,
-    ) -> AppSettings:
-        """Update app settings. Only provided fields are updated."""
-        updates = []
-        params: list[Any] = []
-
-        if max_radio_contacts is not None:
-            updates.append("max_radio_contacts = ?")
-            params.append(max_radio_contacts)
-
-        if favorites is not None:
-            updates.append("favorites = ?")
-            favorites_json = json.dumps([f.model_dump() for f in favorites])
-            params.append(favorites_json)
-
-        if auto_decrypt_dm_on_advert is not None:
-            updates.append("auto_decrypt_dm_on_advert = ?")
-            params.append(1 if auto_decrypt_dm_on_advert else 0)
-
-        if sidebar_sort_order is not None:
-            updates.append("sidebar_sort_order = ?")
-            params.append(sidebar_sort_order)
-
-        if last_message_times is not None:
-            updates.append("last_message_times = ?")
-            params.append(json.dumps(last_message_times))
-
-        if preferences_migrated is not None:
-            updates.append("preferences_migrated = ?")
-            params.append(1 if preferences_migrated else 0)
-
-        if updates:
-            query = f"UPDATE app_settings SET {', '.join(updates)} WHERE id = 1"
-            await db.conn.execute(query, params)
-            await db.conn.commit()
-
-        return await AppSettingsRepository.get()
-
-    @staticmethod
-    async def add_favorite(fav_type: Literal["channel", "contact"], fav_id: str) -> AppSettings:
-        """Add a favorite, avoiding duplicates."""
-        settings = await AppSettingsRepository.get()
-
-        # Check if already favorited
-        if any(f.type == fav_type and f.id == fav_id for f in settings.favorites):
-            return settings
-
-        new_favorites = settings.favorites + [Favorite(type=fav_type, id=fav_id)]
-        return await AppSettingsRepository.update(favorites=new_favorites)
-
-    @staticmethod
-    async def remove_favorite(fav_type: Literal["channel", "contact"], fav_id: str) -> AppSettings:
-        """Remove a favorite."""
-        settings = await AppSettingsRepository.get()
-        new_favorites = [
-            f for f in settings.favorites if not (f.type == fav_type and f.id == fav_id)
-        ]
-        return await AppSettingsRepository.update(favorites=new_favorites)
-
-    @staticmethod
-    async def update_last_message_time(state_key: str, timestamp: int) -> None:
-        """Update the last message time for a conversation atomically.
-
-        Only updates if the new timestamp is greater than the existing one.
-        Uses SQLite's json_set for atomic update to avoid race conditions.
-        """
-        # Use COALESCE to handle NULL or missing keys, json_set for atomic update
-        # Only update if new timestamp > existing (or key doesn't exist)
-        await db.conn.execute(
-            """
-            UPDATE app_settings
-            SET last_message_times = json_set(
-                COALESCE(last_message_times, '{}'),
-                '$.' || ?,
-                ?
-            )
-            WHERE id = 1
-            AND (
-                json_extract(last_message_times, '$.' || ?) IS NULL
-                OR json_extract(last_message_times, '$.' || ?) < ?
-            )
-            """,
-            (state_key, timestamp, state_key, state_key, timestamp),
-        )
-        await db.conn.commit()
-
-    @staticmethod
-    async def migrate_preferences_from_frontend(
-        favorites: list[dict],
-        sort_order: str,
-        last_message_times: dict[str, int],
-    ) -> tuple[AppSettings, bool]:
-        """Migrate all preferences from frontend localStorage.
-
-        This is a one-time migration. If already migrated, returns current settings
-        without overwriting. Returns (settings, did_migrate) tuple.
-        """
-        settings = await AppSettingsRepository.get()
-
-        if settings.preferences_migrated:
-            # Already migrated, don't overwrite
-            return settings, False
-
-        # Convert frontend favorites format to Favorite objects
-        new_favorites = []
-        for f in favorites:
-            if f.get("type") in ("channel", "contact") and f.get("id"):
-                new_favorites.append(Favorite(type=f["type"], id=f["id"]))
-
-        # Update with migrated preferences and mark as migrated
-        settings = await AppSettingsRepository.update(
-            favorites=new_favorites,
-            sidebar_sort_order=sort_order if sort_order in ("recent", "alpha") else "recent",
-            last_message_times=last_message_times,
-            preferences_migrated=True,
-        )
-
-        return settings, True

app/repository/__init__.py

@@ -0,0 +1,24 @@
+from app.repository.channels import ChannelRepository
+from app.repository.contacts import (
+    AmbiguousPublicKeyPrefixError,
+    ContactAdvertPathRepository,
+    ContactNameHistoryRepository,
+    ContactRepository,
+)
+from app.repository.fanout import FanoutConfigRepository
+from app.repository.messages import MessageRepository
+from app.repository.raw_packets import RawPacketRepository
+from app.repository.settings import AppSettingsRepository, StatisticsRepository
+
+__all__ = [
+    "AmbiguousPublicKeyPrefixError",
+    "AppSettingsRepository",
+    "ChannelRepository",
+    "ContactAdvertPathRepository",
+    "ContactNameHistoryRepository",
+    "ContactRepository",
+    "FanoutConfigRepository",
+    "MessageRepository",
+    "RawPacketRepository",
+    "StatisticsRepository",
+]

app/repository/channels.py

@@ -0,0 +1,86 @@
+import time
+
+from app.database import db
+from app.models import Channel
+
+
+class ChannelRepository:
+    @staticmethod
+    async def upsert(key: str, name: str, is_hashtag: bool = False, on_radio: bool = False) -> None:
+        """Upsert a channel. Key is 32-char hex string."""
+        await db.conn.execute(
+            """
+            INSERT INTO channels (key, name, is_hashtag, on_radio)
+            VALUES (?, ?, ?, ?)
+            ON CONFLICT(key) DO UPDATE SET
+                name = excluded.name,
+                is_hashtag = excluded.is_hashtag,
+                on_radio = excluded.on_radio
+            """,
+            (key.upper(), name, is_hashtag, on_radio),
+        )
+        await db.conn.commit()
+
+    @staticmethod
+    async def get_by_key(key: str) -> Channel | None:
+        """Get a channel by its key (32-char hex string)."""
+        cursor = await db.conn.execute(
+            "SELECT key, name, is_hashtag, on_radio, last_read_at FROM channels WHERE key = ?",
+            (key.upper(),),
+        )
+        row = await cursor.fetchone()
+        if row:
+            return Channel(
+                key=row["key"],
+                name=row["name"],
+                is_hashtag=bool(row["is_hashtag"]),
+                on_radio=bool(row["on_radio"]),
+                last_read_at=row["last_read_at"],
+            )
+        return None
+
+    @staticmethod
+    async def get_all() -> list[Channel]:
+        cursor = await db.conn.execute(
+            "SELECT key, name, is_hashtag, on_radio, last_read_at FROM channels ORDER BY name"
+        )
+        rows = await cursor.fetchall()
+        return [
+            Channel(
+                key=row["key"],
+                name=row["name"],
+                is_hashtag=bool(row["is_hashtag"]),
+                on_radio=bool(row["on_radio"]),
+                last_read_at=row["last_read_at"],
+            )
+            for row in rows
+        ]
+
+    @staticmethod
+    async def delete(key: str) -> None:
+        """Delete a channel by key."""
+        await db.conn.execute(
+            "DELETE FROM channels WHERE key = ?",
+            (key.upper(),),
+        )
+        await db.conn.commit()
+
+    @staticmethod
+    async def update_last_read_at(key: str, timestamp: int | None = None) -> bool:
+        """Update the last_read_at timestamp for a channel.
+
+        Returns True if a row was updated, False if channel not found.
+        """
+        ts = timestamp if timestamp is not None else int(time.time())
+        cursor = await db.conn.execute(
+            "UPDATE channels SET last_read_at = ? WHERE key = ?",
+            (ts, key.upper()),
+        )
+        await db.conn.commit()
+        return cursor.rowcount > 0
+
+    @staticmethod
+    async def mark_all_read(timestamp: int) -> None:
+        """Mark all channels as read at the given timestamp."""
+        await db.conn.execute("UPDATE channels SET last_read_at = ?", (timestamp,))
+        await db.conn.commit()

app/repository/contacts.py

@@ -0,0 +1,442 @@
+import time
+from typing import Any
+
+from app.database import db
+from app.models import (
+    Contact,
+    ContactAdvertPath,
+    ContactAdvertPathSummary,
+    ContactNameHistory,
+)
+from app.path_utils import first_hop_hex
+
+
+class AmbiguousPublicKeyPrefixError(ValueError):
+    """Raised when a public key prefix matches multiple contacts."""
+
+    def __init__(self, prefix: str, matches: list[str]):
+        self.prefix = prefix.lower()
+        self.matches = matches
+        super().__init__(f"Ambiguous public key prefix '{self.prefix}'")
+
+
+class ContactRepository:
+    @staticmethod
+    async def upsert(contact: dict[str, Any]) -> None:
+        out_path_hash_mode = contact.get("out_path_hash_mode")
+        if out_path_hash_mode is None:
+            out_path_hash_mode = -1 if contact.get("last_path_len", -1) == -1 else 0
+
+        await db.conn.execute(
+            """
+            INSERT INTO contacts (public_key, name, type, flags, last_path, last_path_len,
+                                  out_path_hash_mode,
+                                  last_advert, lat, lon, last_seen,
+                                  on_radio, last_contacted, first_seen)
+            VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+            ON CONFLICT(public_key) DO UPDATE SET
+                name = COALESCE(excluded.name, contacts.name),
+                type = CASE WHEN excluded.type = 0 THEN contacts.type ELSE excluded.type END,
+                flags = excluded.flags,
+                last_path = COALESCE(excluded.last_path, contacts.last_path),
+                last_path_len = excluded.last_path_len,
+                out_path_hash_mode = excluded.out_path_hash_mode,
+                last_advert = COALESCE(excluded.last_advert, contacts.last_advert),
+                lat = COALESCE(excluded.lat, contacts.lat),
+                lon = COALESCE(excluded.lon, contacts.lon),
+                last_seen = excluded.last_seen,
+                on_radio = COALESCE(excluded.on_radio, contacts.on_radio),
+                last_contacted = COALESCE(excluded.last_contacted, contacts.last_contacted),
+                first_seen = COALESCE(contacts.first_seen, excluded.first_seen)
+            """,
+            (
+                contact.get("public_key", "").lower(),
+                contact.get("name"),
+                contact.get("type", 0),
+                contact.get("flags", 0),
+                contact.get("last_path"),
+                contact.get("last_path_len", -1),
+                out_path_hash_mode,
+                contact.get("last_advert"),
+                contact.get("lat"),
+                contact.get("lon"),
+                contact.get("last_seen", int(time.time())),
+                contact.get("on_radio"),
+                contact.get("last_contacted"),
+                contact.get("first_seen"),
+            ),
+        )
+        await db.conn.commit()
+
+    @staticmethod
+    def _row_to_contact(row) -> Contact:
+        """Convert a database row to a Contact model."""
+        return Contact(
+            public_key=row["public_key"],
+            name=row["name"],
+            type=row["type"],
+            flags=row["flags"],
+            last_path=row["last_path"],
+            last_path_len=row["last_path_len"],
+            out_path_hash_mode=row["out_path_hash_mode"],
+            last_advert=row["last_advert"],
+            lat=row["lat"],
+            lon=row["lon"],
+            last_seen=row["last_seen"],
+            on_radio=bool(row["on_radio"]),
+            last_contacted=row["last_contacted"],
+            last_read_at=row["last_read_at"],
+            first_seen=row["first_seen"],
+        )
+
+    @staticmethod
+    async def get_by_key(public_key: str) -> Contact | None:
+        cursor = await db.conn.execute(
+            "SELECT * FROM contacts WHERE public_key = ?", (public_key.lower(),)
+        )
+        row = await cursor.fetchone()
+        return ContactRepository._row_to_contact(row) if row else None
+
+    @staticmethod
+    async def get_by_key_prefix(prefix: str) -> Contact | None:
+        """Get a contact by key prefix only if it resolves uniquely.
+
+        Returns None when no contacts match OR when multiple contacts match
+        the prefix (to avoid silently selecting the wrong contact).
+        """
+        normalized_prefix = prefix.lower()
+        cursor = await db.conn.execute(
+            "SELECT * FROM contacts WHERE public_key LIKE ? ORDER BY public_key LIMIT 2",
+            (f"{normalized_prefix}%",),
+        )
+        rows = list(await cursor.fetchall())
+        if len(rows) != 1:
+            return None
+        return ContactRepository._row_to_contact(rows[0])
+
+    @staticmethod
+    async def _get_prefix_matches(prefix: str, limit: int = 2) -> list[Contact]:
+        """Get contacts matching a key prefix, up to limit."""
+        cursor = await db.conn.execute(
+            "SELECT * FROM contacts WHERE public_key LIKE ? ORDER BY public_key LIMIT ?",
+            (f"{prefix.lower()}%", limit),
+        )
+        rows = list(await cursor.fetchall())
+        return [ContactRepository._row_to_contact(row) for row in rows]
+
+    @staticmethod
+    async def get_by_key_or_prefix(key_or_prefix: str) -> Contact | None:
+        """Get a contact by exact key match, falling back to prefix match.
+
+        Useful when the input might be a full 64-char public key or a shorter prefix.
+        """
+        contact = await ContactRepository.get_by_key(key_or_prefix)
+        if contact:
+            return contact
+
+        matches = await ContactRepository._get_prefix_matches(key_or_prefix, limit=2)
+        if len(matches) == 1:
+            return matches[0]
+        if len(matches) > 1:
+            raise AmbiguousPublicKeyPrefixError(
+                key_or_prefix,
+                [m.public_key for m in matches],
+            )
+        return None
+
+    @staticmethod
+    async def get_by_name(name: str) -> list[Contact]:
+        """Get all contacts with the given exact name."""
+        cursor = await db.conn.execute("SELECT * FROM contacts WHERE name = ?", (name,))
+        rows = await cursor.fetchall()
+        return [ContactRepository._row_to_contact(row) for row in rows]
+
+    @staticmethod
+    async def resolve_prefixes(prefixes: list[str]) -> dict[str, Contact]:
+        """Resolve multiple key prefixes to contacts in a single query.
+
+        Returns a dict mapping each prefix to its Contact, only for prefixes
+        that resolve uniquely (exactly one match). Ambiguous or unmatched
+        prefixes are omitted.
+        """
+        if not prefixes:
+            return {}
+        normalized = [p.lower() for p in prefixes]
+        conditions = " OR ".join(["public_key LIKE ?"] * len(normalized))
+        params = [f"{p}%" for p in normalized]
+        cursor = await db.conn.execute(f"SELECT * FROM contacts WHERE {conditions}", params)
+        rows = await cursor.fetchall()
+        # Group by which prefix each row matches
+        prefix_to_rows: dict[str, list] = {p: [] for p in normalized}
+        for row in rows:
+            pk = row["public_key"]
+            for p in normalized:
+                if pk.startswith(p):
+                    prefix_to_rows[p].append(row)
+        # Only include uniquely-resolved prefixes
+        result: dict[str, Contact] = {}
+        for p in normalized:
+            if len(prefix_to_rows[p]) == 1:
+                result[p] = ContactRepository._row_to_contact(prefix_to_rows[p][0])
+        return result
+
+    @staticmethod
+    async def get_all(limit: int = 100, offset: int = 0) -> list[Contact]:
+        cursor = await db.conn.execute(
+            "SELECT * FROM contacts ORDER BY COALESCE(name, public_key) LIMIT ? OFFSET ?",
+            (limit, offset),
+        )
+        rows = await cursor.fetchall()
+        return [ContactRepository._row_to_contact(row) for row in rows]
+
+    @staticmethod
+    async def get_recent_non_repeaters(limit: int = 200) -> list[Contact]:
+        """Get the most recently active non-repeater contacts.
+
+        Orders by most recent activity (last_contacted or last_advert),
+        excluding repeaters (type=2).
+        """
+        cursor = await db.conn.execute(
+            """
+            SELECT * FROM contacts
+            WHERE type != 2
+            ORDER BY COALESCE(last_contacted, 0) DESC, COALESCE(last_advert, 0) DESC
+            LIMIT ?
+            """,
+            (limit,),
+        )
+        rows = await cursor.fetchall()
+        return [ContactRepository._row_to_contact(row) for row in rows]
+
+    @staticmethod
+    async def update_path(
+        public_key: str,
+        path: str,
+        path_len: int,
+        out_path_hash_mode: int | None = None,
+    ) -> None:
+        await db.conn.execute(
+            """UPDATE contacts SET last_path = ?, last_path_len = ?,
+               out_path_hash_mode = COALESCE(?, out_path_hash_mode),
+               last_seen = ? WHERE public_key = ?""",
+            (path, path_len, out_path_hash_mode, int(time.time()), public_key.lower()),
+        )
+        await db.conn.commit()
+
+    @staticmethod
+    async def set_on_radio(public_key: str, on_radio: bool) -> None:
+        await db.conn.execute(
+            "UPDATE contacts SET on_radio = ? WHERE public_key = ?",
+            (on_radio, public_key.lower()),
+        )
+        await db.conn.commit()
+
+    @staticmethod
+    async def clear_on_radio_except(keep_keys: list[str]) -> None:
+        """Set on_radio=False for all contacts NOT in keep_keys."""
+        if not keep_keys:
+            await db.conn.execute("UPDATE contacts SET on_radio = 0 WHERE on_radio = 1")
+        else:
+            placeholders = ",".join("?" * len(keep_keys))
+            await db.conn.execute(
+                f"UPDATE contacts SET on_radio = 0 WHERE on_radio = 1 AND public_key NOT IN ({placeholders})",
+                keep_keys,
+            )
+        await db.conn.commit()
+
+    @staticmethod
+    async def delete(public_key: str) -> None:
+        normalized = public_key.lower()
+        await db.conn.execute(
+            "DELETE FROM contact_name_history WHERE public_key = ?", (normalized,)
+        )
+        await db.conn.execute(
+            "DELETE FROM contact_advert_paths WHERE public_key = ?", (normalized,)
+        )
+        await db.conn.execute("DELETE FROM contacts WHERE public_key = ?", (normalized,))
+        await db.conn.commit()
+
+    @staticmethod
+    async def update_last_contacted(public_key: str, timestamp: int | None = None) -> None:
+        """Update the last_contacted timestamp for a contact."""
+        ts = timestamp if timestamp is not None else int(time.time())
+        await db.conn.execute(
+            "UPDATE contacts SET last_contacted = ?, last_seen = ? WHERE public_key = ?",
+            (ts, ts, public_key.lower()),
+        )
+        await db.conn.commit()
+
+    @staticmethod
+    async def update_last_read_at(public_key: str, timestamp: int | None = None) -> bool:
+        """Update the last_read_at timestamp for a contact.
+
+        Returns True if a row was updated, False if contact not found.
+        """
+        ts = timestamp if timestamp is not None else int(time.time())
+        cursor = await db.conn.execute(
+            "UPDATE contacts SET last_read_at = ? WHERE public_key = ?",
+            (ts, public_key.lower()),
+        )
+        await db.conn.commit()
+        return cursor.rowcount > 0
+
+    @staticmethod
+    async def mark_all_read(timestamp: int) -> None:
+        """Mark all contacts as read at the given timestamp."""
+        await db.conn.execute("UPDATE contacts SET last_read_at = ?", (timestamp,))
+        await db.conn.commit()
+
+    @staticmethod
+    async def get_by_pubkey_first_byte(hex_byte: str) -> list[Contact]:
+        """Get contacts whose public key starts with the given hex byte (2 chars)."""
+        cursor = await db.conn.execute(
+            "SELECT * FROM contacts WHERE substr(public_key, 1, 2) = ?",
+            (hex_byte.lower(),),
+        )
+        rows = await cursor.fetchall()
+        return [ContactRepository._row_to_contact(row) for row in rows]
+
+
+class ContactAdvertPathRepository:
+    """Repository for recent unique advertisement paths per contact."""
+
+    @staticmethod
+    def _row_to_path(row) -> ContactAdvertPath:
+        path = row["path_hex"] or ""
+        path_len = row["path_len"]
+        next_hop = first_hop_hex(path, path_len)
+        return ContactAdvertPath(
+            path=path,
+            path_len=path_len,
+            next_hop=next_hop,
+            first_seen=row["first_seen"],
+            last_seen=row["last_seen"],
+            heard_count=row["heard_count"],
+        )
+
+    @staticmethod
+    async def record_observation(
+        public_key: str,
+        path_hex: str,
+        timestamp: int,
+        max_paths: int = 10,
+        hop_count: int | None = None,
+    ) -> None:
+        """
+        Upsert a unique advert path observation for a contact and prune to N most recent.
+        """
+        if max_paths < 1:
+            max_paths = 1
+
+        normalized_key = public_key.lower()
+        normalized_path = path_hex.lower()
+        path_len = hop_count if hop_count is not None else len(normalized_path) // 2
+
+        await db.conn.execute(
+            """
+            INSERT INTO contact_advert_paths
+                (public_key, path_hex, path_len, first_seen, last_seen, heard_count)
+            VALUES (?, ?, ?, ?, ?, 1)
+            ON CONFLICT(public_key, path_hex, path_len) DO UPDATE SET
+                last_seen = MAX(contact_advert_paths.last_seen, excluded.last_seen),
+                heard_count = contact_advert_paths.heard_count + 1
+            """,
+            (normalized_key, normalized_path, path_len, timestamp, timestamp),
+        )
+
+        # Keep only the N most recent unique paths per contact.
+        await db.conn.execute(
+            """
+            DELETE FROM contact_advert_paths
+            WHERE public_key = ?
+              AND id NOT IN (
+                  SELECT id
+                  FROM contact_advert_paths
+                  WHERE public_key = ?
+                  ORDER BY last_seen DESC, heard_count DESC, path_len ASC, path_hex ASC
+                  LIMIT ?
+              )
+            """,
+            (normalized_key, normalized_key, max_paths),
+        )
+        await db.conn.commit()
+
+    @staticmethod
+    async def get_recent_for_contact(public_key: str, limit: int = 10) -> list[ContactAdvertPath]:
+        cursor = await db.conn.execute(
+            """
+            SELECT path_hex, path_len, first_seen, last_seen, heard_count
+            FROM contact_advert_paths
+            WHERE public_key = ?
+            ORDER BY last_seen DESC, heard_count DESC, path_len ASC, path_hex ASC
+            LIMIT ?
+            """,
+            (public_key.lower(), limit),
+        )
+        rows = await cursor.fetchall()
+        return [ContactAdvertPathRepository._row_to_path(row) for row in rows]
+
+    @staticmethod
+    async def get_recent_for_all_contacts(
+        limit_per_contact: int = 10,
+    ) -> list[ContactAdvertPathSummary]:
+        cursor = await db.conn.execute(
+            """
+            SELECT public_key, path_hex, path_len, first_seen, last_seen, heard_count
+            FROM contact_advert_paths
+            ORDER BY public_key ASC, last_seen DESC, heard_count DESC, path_len ASC, path_hex ASC
+            """
+        )
+        rows = await cursor.fetchall()
+
+        grouped: dict[str, list[ContactAdvertPath]] = {}
+        for row in rows:
+            key = row["public_key"]
+            paths = grouped.get(key)
+            if paths is None:
+                paths = []
+                grouped[key] = paths
+            if len(paths) >= limit_per_contact:
+                continue
+            paths.append(ContactAdvertPathRepository._row_to_path(row))
+
+        return [
+            ContactAdvertPathSummary(public_key=key, paths=paths) for key, paths in grouped.items()
+        ]
+
+
+class ContactNameHistoryRepository:
+    """Repository for contact name change history."""
+
+    @staticmethod
+    async def record_name(public_key: str, name: str, timestamp: int) -> None:
+        """Record a name observation. Upserts: updates last_seen if name already known."""
+        await db.conn.execute(
+            """
+            INSERT INTO contact_name_history (public_key, name, first_seen, last_seen)
+            VALUES (?, ?, ?, ?)
+            ON CONFLICT(public_key, name) DO UPDATE SET
+                last_seen = MAX(contact_name_history.last_seen, excluded.last_seen)
+            """,
+            (public_key.lower(), name, timestamp, timestamp),
+        )
+        await db.conn.commit()
+
+    @staticmethod
+    async def get_history(public_key: str) -> list[ContactNameHistory]:
+        cursor = await db.conn.execute(
+            """
+            SELECT name, first_seen, last_seen
+            FROM contact_name_history
+            WHERE public_key = ?
+            ORDER BY last_seen DESC
+            """,
+            (public_key.lower(),),
+        )
+        rows = await cursor.fetchall()
+        return [
+            ContactNameHistory(
+                name=row["name"], first_seen=row["first_seen"], last_seen=row["last_seen"]
+            )
+            for row in rows
+        ]

app/repository/fanout.py

@@ -0,0 +1,137 @@
+"""Repository for fanout_configs table."""
+
+import json
+import logging
+import time
+import uuid
+from typing import Any
+
+from app.database import db
+
+logger = logging.getLogger(__name__)
+
+# In-memory cache of config metadata (name, type) for status reporting.
+# Populated by get_all/get/create/update and read by FanoutManager.get_statuses().
+_configs_cache: dict[str, dict[str, Any]] = {}
+
+
+def _row_to_dict(row: Any) -> dict[str, Any]:
+    """Convert a database row to a config dict."""
+    result = {
+        "id": row["id"],
+        "type": row["type"],
+        "name": row["name"],
+        "enabled": bool(row["enabled"]),
+        "config": json.loads(row["config"]) if row["config"] else {},
+        "scope": json.loads(row["scope"]) if row["scope"] else {},
+        "sort_order": row["sort_order"] or 0,
+        "created_at": row["created_at"] or 0,
+    }
+    _configs_cache[result["id"]] = result
+    return result
+
+
+class FanoutConfigRepository:
+    """CRUD operations for fanout_configs table."""
+
+    @staticmethod
+    async def get_all() -> list[dict[str, Any]]:
+        """Get all fanout configs ordered by sort_order."""
+        cursor = await db.conn.execute(
+            "SELECT * FROM fanout_configs ORDER BY sort_order, created_at"
+        )
+        rows = await cursor.fetchall()
+        return [_row_to_dict(row) for row in rows]
+
+    @staticmethod
+    async def get(config_id: str) -> dict[str, Any] | None:
+        """Get a single fanout config by ID."""
+        cursor = await db.conn.execute("SELECT * FROM fanout_configs WHERE id = ?", (config_id,))
+        row = await cursor.fetchone()
+        if row is None:
+            return None
+        return _row_to_dict(row)
+
+    @staticmethod
+    async def create(
+        config_type: str,
+        name: str,
+        config: dict,
+        scope: dict,
+        enabled: bool = True,
+        config_id: str | None = None,
+    ) -> dict[str, Any]:
+        """Create a new fanout config."""
+        new_id = config_id or str(uuid.uuid4())
+        now = int(time.time())
+
+        # Get next sort_order
+        cursor = await db.conn.execute(
+            "SELECT COALESCE(MAX(sort_order), -1) + 1 FROM fanout_configs"
+        )
+        row = await cursor.fetchone()
+        sort_order = row[0] if row else 0
+
+        await db.conn.execute(
+            """
+            INSERT INTO fanout_configs (id, type, name, enabled, config, scope, sort_order, created_at)
+            VALUES (?, ?, ?, ?, ?, ?, ?, ?)
+            """,
+            (
+                new_id,
+                config_type,
+                name,
+                1 if enabled else 0,
+                json.dumps(config),
+                json.dumps(scope),
+                sort_order,
+                now,
+            ),
+        )
+        await db.conn.commit()
+
+        result = await FanoutConfigRepository.get(new_id)
+        assert result is not None
+        return result
+
+    @staticmethod
+    async def update(config_id: str, **fields: Any) -> dict[str, Any] | None:
+        """Update a fanout config. Only provided fields are updated."""
+        updates = []
+        params: list[Any] = []
+
+        for field in ("name", "enabled", "config", "scope", "sort_order"):
+            if field in fields:
+                value = fields[field]
+                if field == "enabled":
+                    value = 1 if value else 0
+                elif field in ("config", "scope"):
+                    value = json.dumps(value)
+                updates.append(f"{field} = ?")
+                params.append(value)
+
+        if not updates:
+            return await FanoutConfigRepository.get(config_id)
+
+        params.append(config_id)
+        query = f"UPDATE fanout_configs SET {', '.join(updates)} WHERE id = ?"
+        await db.conn.execute(query, params)
+        await db.conn.commit()
+
+        return await FanoutConfigRepository.get(config_id)
+
+    @staticmethod
+    async def delete(config_id: str) -> None:
+        """Delete a fanout config."""
+        await db.conn.execute("DELETE FROM fanout_configs WHERE id = ?", (config_id,))
+        await db.conn.commit()
+        _configs_cache.pop(config_id, None)
+
+    @staticmethod
+    async def get_enabled() -> list[dict[str, Any]]:
+        """Get all enabled fanout configs."""
+        cursor = await db.conn.execute(
+            "SELECT * FROM fanout_configs WHERE enabled = 1 ORDER BY sort_order, created_at"
+        )
+        rows = await cursor.fetchall()
+        return [_row_to_dict(row) for row in rows]

app/repository/messages.py

@@ -0,0 +1,634 @@
+import json
+import time
+from typing import Any
+
+from app.database import db
+from app.models import Message, MessagePath
+
+
+class MessageRepository:
+    @staticmethod
+    def _parse_paths(paths_json: str | None) -> list[MessagePath] | None:
+        """Parse paths JSON string to list of MessagePath objects."""
+        if not paths_json:
+            return None
+        try:
+            paths_data = json.loads(paths_json)
+            return [MessagePath(**p) for p in paths_data]
+        except (json.JSONDecodeError, TypeError, KeyError, ValueError):
+            return None
+
+    @staticmethod
+    async def create(
+        msg_type: str,
+        text: str,
+        received_at: int,
+        conversation_key: str,
+        sender_timestamp: int | None = None,
+        path: str | None = None,
+        path_len: int | None = None,
+        txt_type: int = 0,
+        signature: str | None = None,
+        outgoing: bool = False,
+        sender_name: str | None = None,
+        sender_key: str | None = None,
+    ) -> int | None:
+        """Create a message, returning the ID or None if duplicate.
+
+        Uses INSERT OR IGNORE to handle the UNIQUE constraint on
+        (type, conversation_key, text, sender_timestamp). This prevents
+        duplicate messages when the same message arrives via multiple RF paths.
+
+        The path parameter is converted to the paths JSON array format.
+        """
+        # Convert single path to paths array format
+        paths_json = None
+        if path is not None:
+            entry: dict = {"path": path, "received_at": received_at}
+            if path_len is not None:
+                entry["path_len"] = path_len
+            paths_json = json.dumps([entry])
+
+        cursor = await db.conn.execute(
+            """
+            INSERT OR IGNORE INTO messages (type, conversation_key, text, sender_timestamp,
+                                            received_at, paths, txt_type, signature, outgoing,
+                                            sender_name, sender_key)
+            VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+            """,
+            (
+                msg_type,
+                conversation_key,
+                text,
+                sender_timestamp,
+                received_at,
+                paths_json,
+                txt_type,
+                signature,
+                outgoing,
+                sender_name,
+                sender_key,
+            ),
+        )
+        await db.conn.commit()
+        # rowcount is 0 if INSERT was ignored due to UNIQUE constraint violation
+        if cursor.rowcount == 0:
+            return None
+        return cursor.lastrowid
+
+    @staticmethod
+    async def add_path(
+        message_id: int,
+        path: str,
+        received_at: int | None = None,
+        path_len: int | None = None,
+    ) -> list[MessagePath]:
+        """Add a new path to an existing message.
+
+        This is used when a repeat/echo of a message arrives via a different route.
+        Returns the updated list of paths.
+        """
+        ts = received_at if received_at is not None else int(time.time())
+
+        # Atomic append: use json_insert to avoid read-modify-write race when
+        # multiple duplicate packets arrive concurrently for the same message.
+        entry: dict = {"path": path, "received_at": ts}
+        if path_len is not None:
+            entry["path_len"] = path_len
+        new_entry = json.dumps(entry)
+        await db.conn.execute(
+            """UPDATE messages SET paths = json_insert(
+                COALESCE(paths, '[]'), '$[#]', json(?)
+            ) WHERE id = ?""",
+            (new_entry, message_id),
+        )
+        await db.conn.commit()
+
+        # Read back the full list for the return value
+        cursor = await db.conn.execute("SELECT paths FROM messages WHERE id = ?", (message_id,))
+        row = await cursor.fetchone()
+        if not row or not row["paths"]:
+            return []
+
+        try:
+            all_paths = json.loads(row["paths"])
+        except json.JSONDecodeError:
+            return []
+
+        return [MessagePath(**p) for p in all_paths]
+
+    @staticmethod
+    async def claim_prefix_messages(full_key: str) -> int:
+        """Promote prefix-stored messages to the full conversation key.
+
+        When a full key becomes known for a contact, any messages stored with
+        only a prefix as conversation_key are updated to use the full key.
+        """
+        lower_key = full_key.lower()
+        cursor = await db.conn.execute(
+            """UPDATE messages SET conversation_key = ?
+               WHERE type = 'PRIV' AND length(conversation_key) < 64
+               AND ? LIKE conversation_key || '%'
+               AND (
+                   SELECT COUNT(*) FROM contacts
+                   WHERE public_key LIKE messages.conversation_key || '%'
+               ) = 1""",
+            (lower_key, lower_key),
+        )
+        await db.conn.commit()
+        return cursor.rowcount
+
+    @staticmethod
+    async def backfill_channel_sender_key(public_key: str, name: str) -> int:
+        """Backfill sender_key on channel messages that match a contact's name.
+
+        When a contact becomes known (via advert, sync, or manual creation),
+        any channel messages with a matching sender_name but no sender_key
+        are updated to associate them with this contact's public key.
+        """
+        cursor = await db.conn.execute(
+            """UPDATE messages SET sender_key = ?
+               WHERE type = 'CHAN' AND sender_name = ? AND sender_key IS NULL""",
+            (public_key.lower(), name),
+        )
+        await db.conn.commit()
+        return cursor.rowcount
+
+    @staticmethod
+    def _normalize_conversation_key(conversation_key: str) -> tuple[str, str]:
+        """Normalize a conversation key and return (sql_clause, normalized_key).
+
+        Returns the WHERE clause fragment and the normalized key value.
+        """
+        if len(conversation_key) == 64:
+            return "AND conversation_key = ?", conversation_key.lower()
+        elif len(conversation_key) == 32:
+            return "AND conversation_key = ?", conversation_key.upper()
+        else:
+            return "AND conversation_key LIKE ?", f"{conversation_key}%"
+
+    @staticmethod
+    def _row_to_message(row: Any) -> Message:
+        """Convert a database row to a Message model."""
+        return Message(
+            id=row["id"],
+            type=row["type"],
+            conversation_key=row["conversation_key"],
+            text=row["text"],
+            sender_timestamp=row["sender_timestamp"],
+            received_at=row["received_at"],
+            paths=MessageRepository._parse_paths(row["paths"]),
+            txt_type=row["txt_type"],
+            signature=row["signature"],
+            sender_key=row["sender_key"],
+            outgoing=bool(row["outgoing"]),
+            acked=row["acked"],
+            sender_name=row["sender_name"],
+        )
+
+    @staticmethod
+    async def get_all(
+        limit: int = 100,
+        offset: int = 0,
+        msg_type: str | None = None,
+        conversation_key: str | None = None,
+        before: int | None = None,
+        before_id: int | None = None,
+        after: int | None = None,
+        after_id: int | None = None,
+        q: str | None = None,
+        blocked_keys: list[str] | None = None,
+        blocked_names: list[str] | None = None,
+    ) -> list[Message]:
+        query = "SELECT * FROM messages WHERE 1=1"
+        params: list[Any] = []
+
+        if blocked_keys:
+            placeholders = ",".join("?" for _ in blocked_keys)
+            query += (
+                f" AND NOT (outgoing=0 AND ("
+                f"(type='PRIV' AND LOWER(conversation_key) IN ({placeholders}))"
+                f" OR (type='CHAN' AND sender_key IS NOT NULL AND LOWER(sender_key) IN ({placeholders}))"
+                f"))"
+            )
+            params.extend(blocked_keys)
+            params.extend(blocked_keys)
+
+        if blocked_names:
+            placeholders = ",".join("?" for _ in blocked_names)
+            query += (
+                f" AND NOT (outgoing=0 AND sender_name IS NOT NULL"
+                f" AND sender_name IN ({placeholders}))"
+            )
+            params.extend(blocked_names)
+
+        if msg_type:
+            query += " AND type = ?"
+            params.append(msg_type)
+        if conversation_key:
+            clause, norm_key = MessageRepository._normalize_conversation_key(conversation_key)
+            query += f" {clause}"
+            params.append(norm_key)
+
+        if q:
+            escaped_q = q.replace("\\", "\\\\").replace("%", "\\%").replace("_", "\\_")
+            query += " AND text LIKE ? ESCAPE '\\' COLLATE NOCASE"
+            params.append(f"%{escaped_q}%")
+
+        # Forward cursor (after/after_id) — mutually exclusive with before/before_id
+        if after is not None and after_id is not None:
+            query += " AND (received_at > ? OR (received_at = ? AND id > ?))"
+            params.extend([after, after, after_id])
+            query += " ORDER BY received_at ASC, id ASC LIMIT ?"
+            params.append(limit)
+        else:
+            if before is not None and before_id is not None:
+                query += " AND (received_at < ? OR (received_at = ? AND id < ?))"
+                params.extend([before, before, before_id])
+
+            query += " ORDER BY received_at DESC, id DESC LIMIT ?"
+            params.append(limit)
+            if before is None or before_id is None:
+                query += " OFFSET ?"
+                params.append(offset)
+
+        cursor = await db.conn.execute(query, params)
+        rows = await cursor.fetchall()
+        return [MessageRepository._row_to_message(row) for row in rows]
+
+    @staticmethod
+    async def get_around(
+        message_id: int,
+        msg_type: str | None = None,
+        conversation_key: str | None = None,
+        context_size: int = 100,
+        blocked_keys: list[str] | None = None,
+        blocked_names: list[str] | None = None,
+    ) -> tuple[list[Message], bool, bool]:
+        """Get messages around a target message.
+
+        Returns (messages, has_older, has_newer).
+        """
+        # Build common WHERE clause for optional conversation/type filtering.
+        # If the target message doesn't match filters, return an empty result.
+        where_parts: list[str] = []
+        base_params: list[Any] = []
+        if msg_type:
+            where_parts.append("type = ?")
+            base_params.append(msg_type)
+        if conversation_key:
+            clause, norm_key = MessageRepository._normalize_conversation_key(conversation_key)
+            where_parts.append(clause.removeprefix("AND "))
+            base_params.append(norm_key)
+
+        if blocked_keys:
+            placeholders = ",".join("?" for _ in blocked_keys)
+            where_parts.append(
+                f"NOT (outgoing=0 AND ("
+                f"(type='PRIV' AND LOWER(conversation_key) IN ({placeholders}))"
+                f" OR (type='CHAN' AND sender_key IS NOT NULL AND LOWER(sender_key) IN ({placeholders}))"
+                f"))"
+            )
+            base_params.extend(blocked_keys)
+            base_params.extend(blocked_keys)
+
+        if blocked_names:
+            placeholders = ",".join("?" for _ in blocked_names)
+            where_parts.append(
+                f"NOT (outgoing=0 AND sender_name IS NOT NULL AND sender_name IN ({placeholders}))"
+            )
+            base_params.extend(blocked_names)
+
+        where_sql = " AND ".join(["1=1", *where_parts])
+
+        # 1. Get the target message (must satisfy filters if provided)
+        target_cursor = await db.conn.execute(
+            f"SELECT * FROM messages WHERE id = ? AND {where_sql}",
+            (message_id, *base_params),
+        )
+        target_row = await target_cursor.fetchone()
+        if not target_row:
+            return [], False, False
+
+        target = MessageRepository._row_to_message(target_row)
+
+        # 2. Get context_size+1 messages before target (DESC)
+        before_query = f"""
+            SELECT * FROM messages WHERE {where_sql}
+            AND (received_at < ? OR (received_at = ? AND id < ?))
+            ORDER BY received_at DESC, id DESC LIMIT ?
+        """
+        before_params = [
+            *base_params,
+            target.received_at,
+            target.received_at,
+            target.id,
+            context_size + 1,
+        ]
+        before_cursor = await db.conn.execute(before_query, before_params)
+        before_rows = list(await before_cursor.fetchall())
+
+        has_older = len(before_rows) > context_size
+        before_messages = [MessageRepository._row_to_message(r) for r in before_rows[:context_size]]
+
+        # 3. Get context_size+1 messages after target (ASC)
+        after_query = f"""
+            SELECT * FROM messages WHERE {where_sql}
+            AND (received_at > ? OR (received_at = ? AND id > ?))
+            ORDER BY received_at ASC, id ASC LIMIT ?
+        """
+        after_params = [
+            *base_params,
+            target.received_at,
+            target.received_at,
+            target.id,
+            context_size + 1,
+        ]
+        after_cursor = await db.conn.execute(after_query, after_params)
+        after_rows = list(await after_cursor.fetchall())
+
+        has_newer = len(after_rows) > context_size
+        after_messages = [MessageRepository._row_to_message(r) for r in after_rows[:context_size]]
+
+        # Combine: before (reversed to ASC) + target + after
+        all_messages = list(reversed(before_messages)) + [target] + after_messages
+        return all_messages, has_older, has_newer
+
+    @staticmethod
+    async def increment_ack_count(message_id: int) -> int:
+        """Increment ack count and return the new value."""
+        await db.conn.execute("UPDATE messages SET acked = acked + 1 WHERE id = ?", (message_id,))
+        await db.conn.commit()
+        cursor = await db.conn.execute("SELECT acked FROM messages WHERE id = ?", (message_id,))
+        row = await cursor.fetchone()
+        return row["acked"] if row else 1
+
+    @staticmethod
+    async def get_ack_and_paths(message_id: int) -> tuple[int, list[MessagePath] | None]:
+        """Get the current ack count and paths for a message."""
+        cursor = await db.conn.execute(
+            "SELECT acked, paths FROM messages WHERE id = ?", (message_id,)
+        )
+        row = await cursor.fetchone()
+        if not row:
+            return 0, None
+        return row["acked"], MessageRepository._parse_paths(row["paths"])
+
+    @staticmethod
+    async def get_by_id(message_id: int) -> "Message | None":
+        """Look up a message by its ID."""
+        cursor = await db.conn.execute(
+            "SELECT * FROM messages WHERE id = ?",
+            (message_id,),
+        )
+        row = await cursor.fetchone()
+        if not row:
+            return None
+
+        return MessageRepository._row_to_message(row)
+
+    @staticmethod
+    async def get_by_content(
+        msg_type: str,
+        conversation_key: str,
+        text: str,
+        sender_timestamp: int | None,
+    ) -> "Message | None":
+        """Look up a message by its unique content fields."""
+        cursor = await db.conn.execute(
+            """
+            SELECT * FROM messages
+            WHERE type = ? AND conversation_key = ? AND text = ?
+              AND (sender_timestamp = ? OR (sender_timestamp IS NULL AND ? IS NULL))
+            """,
+            (msg_type, conversation_key, text, sender_timestamp, sender_timestamp),
+        )
+        row = await cursor.fetchone()
+        if not row:
+            return None
+
+        return MessageRepository._row_to_message(row)
+
+    @staticmethod
+    async def get_unread_counts(
+        name: str | None = None,
+        blocked_keys: list[str] | None = None,
+        blocked_names: list[str] | None = None,
+    ) -> dict:
+        """Get unread message counts, mention flags, and last message times for all conversations.
+
+        Args:
+            name: User's display name for @[name] mention detection. If None, mentions are skipped.
+            blocked_keys: Public keys whose messages should be excluded from counts.
+            blocked_names: Display names whose messages should be excluded from counts.
+
+        Returns:
+            Dict with 'counts', 'mentions', and 'last_message_times' keys.
+        """
+        counts: dict[str, int] = {}
+        mention_flags: dict[str, bool] = {}
+        last_message_times: dict[str, int] = {}
+
+        mention_token = f"@[{name}]" if name else None
+
+        # Build optional block-list WHERE fragments for channel messages
+        chan_block_sql = ""
+        chan_block_params: list[Any] = []
+        if blocked_keys:
+            placeholders = ",".join("?" for _ in blocked_keys)
+            chan_block_sql += (
+                f" AND NOT (m.sender_key IS NOT NULL AND LOWER(m.sender_key) IN ({placeholders}))"
+            )
+            chan_block_params.extend(blocked_keys)
+        if blocked_names:
+            placeholders = ",".join("?" for _ in blocked_names)
+            chan_block_sql += (
+                f" AND NOT (m.sender_name IS NOT NULL AND m.sender_name IN ({placeholders}))"
+            )
+            chan_block_params.extend(blocked_names)
+
+        # Channel unreads
+        cursor = await db.conn.execute(
+            f"""
+            SELECT m.conversation_key,
+                   COUNT(*) as unread_count,
+                   SUM(CASE
+                           WHEN ? <> '' AND INSTR(LOWER(m.text), LOWER(?)) > 0 THEN 1
+                           ELSE 0
+                       END) > 0 as has_mention
+            FROM messages m
+            JOIN channels c ON m.conversation_key = c.key
+            WHERE m.type = 'CHAN' AND m.outgoing = 0
+              AND m.received_at > COALESCE(c.last_read_at, 0)
+              {chan_block_sql}
+            GROUP BY m.conversation_key
+            """,
+            (mention_token or "", mention_token or "", *chan_block_params),
+        )
+        rows = await cursor.fetchall()
+        for row in rows:
+            state_key = f"channel-{row['conversation_key']}"
+            counts[state_key] = row["unread_count"]
+            if mention_token and row["has_mention"]:
+                mention_flags[state_key] = True
+
+        # Build block-list exclusion for contact (DM) unreads
+        contact_block_sql = ""
+        contact_block_params: list[Any] = []
+        if blocked_keys:
+            placeholders = ",".join("?" for _ in blocked_keys)
+            contact_block_sql += f" AND LOWER(m.conversation_key) NOT IN ({placeholders})"
+            contact_block_params.extend(blocked_keys)
+
+        # Contact unreads
+        cursor = await db.conn.execute(
+            f"""
+            SELECT m.conversation_key,
+                   COUNT(*) as unread_count,
+                   SUM(CASE
+                           WHEN ? <> '' AND INSTR(LOWER(m.text), LOWER(?)) > 0 THEN 1
+                           ELSE 0
+                       END) > 0 as has_mention
+            FROM messages m
+            JOIN contacts ct ON m.conversation_key = ct.public_key
+            WHERE m.type = 'PRIV' AND m.outgoing = 0
+              AND m.received_at > COALESCE(ct.last_read_at, 0)
+              {contact_block_sql}
+            GROUP BY m.conversation_key
+            """,
+            (mention_token or "", mention_token or "", *contact_block_params),
+        )
+        rows = await cursor.fetchall()
+        for row in rows:
+            state_key = f"contact-{row['conversation_key']}"
+            counts[state_key] = row["unread_count"]
+            if mention_token and row["has_mention"]:
+                mention_flags[state_key] = True
+
+        # Last message times for all conversations (including read ones)
+        cursor = await db.conn.execute(
+            """
+            SELECT type, conversation_key, MAX(received_at) as last_message_time
+            FROM messages
+            GROUP BY type, conversation_key
+            """
+        )
+        rows = await cursor.fetchall()
+        for row in rows:
+            prefix = "channel" if row["type"] == "CHAN" else "contact"
+            state_key = f"{prefix}-{row['conversation_key']}"
+            last_message_times[state_key] = row["last_message_time"]
+
+        return {
+            "counts": counts,
+            "mentions": mention_flags,
+            "last_message_times": last_message_times,
+        }
+
+    @staticmethod
+    async def count_dm_messages(contact_key: str) -> int:
+        """Count total DM messages for a contact."""
+        cursor = await db.conn.execute(
+            "SELECT COUNT(*) as cnt FROM messages WHERE type = 'PRIV' AND conversation_key = ?",
+            (contact_key.lower(),),
+        )
+        row = await cursor.fetchone()
+        return row["cnt"] if row else 0
+
+    @staticmethod
+    async def count_channel_messages_by_sender(sender_key: str) -> int:
+        """Count channel messages sent by a specific contact."""
+        cursor = await db.conn.execute(
+            "SELECT COUNT(*) as cnt FROM messages WHERE type = 'CHAN' AND sender_key = ?",
+            (sender_key.lower(),),
+        )
+        row = await cursor.fetchone()
+        return row["cnt"] if row else 0
+
+    @staticmethod
+    async def get_channel_stats(conversation_key: str) -> dict:
+        """Get channel message statistics: time-windowed counts, first message, unique senders, top senders.
+
+        Returns a dict with message_counts, first_message_at, unique_sender_count, top_senders_24h.
+        """
+        import time as _time
+
+        now = int(_time.time())
+        t_1h = now - 3600
+        t_24h = now - 86400
+        t_48h = now - 172800
+        t_7d = now - 604800
+
+        cursor = await db.conn.execute(
+            """
+            SELECT COUNT(*) AS all_time,
+                SUM(CASE WHEN received_at >= ? THEN 1 ELSE 0 END) AS last_1h,
+                SUM(CASE WHEN received_at >= ? THEN 1 ELSE 0 END) AS last_24h,
+                SUM(CASE WHEN received_at >= ? THEN 1 ELSE 0 END) AS last_48h,
+                SUM(CASE WHEN received_at >= ? THEN 1 ELSE 0 END) AS last_7d,
+                MIN(received_at) AS first_message_at,
+                COUNT(DISTINCT sender_key) AS unique_sender_count
+            FROM messages WHERE type = 'CHAN' AND conversation_key = ?
+            """,
+            (t_1h, t_24h, t_48h, t_7d, conversation_key),
+        )
+        row = await cursor.fetchone()
+        assert row is not None  # Aggregate query always returns a row
+
+        message_counts = {
+            "last_1h": row["last_1h"] or 0,
+            "last_24h": row["last_24h"] or 0,
+            "last_48h": row["last_48h"] or 0,
+            "last_7d": row["last_7d"] or 0,
+            "all_time": row["all_time"] or 0,
+        }
+
+        cursor2 = await db.conn.execute(
+            """
+            SELECT COALESCE(sender_name, sender_key, 'Unknown') AS display_name,
+                sender_key, COUNT(*) AS cnt
+            FROM messages
+            WHERE type = 'CHAN' AND conversation_key = ?
+                AND received_at >= ? AND sender_key IS NOT NULL
+            GROUP BY sender_key ORDER BY cnt DESC LIMIT 5
+            """,
+            (conversation_key, t_24h),
+        )
+        top_rows = await cursor2.fetchall()
+        top_senders = [
+            {
+                "sender_name": r["display_name"],
+                "sender_key": r["sender_key"],
+                "message_count": r["cnt"],
+            }
+            for r in top_rows
+        ]
+
+        return {
+            "message_counts": message_counts,
+            "first_message_at": row["first_message_at"],
+            "unique_sender_count": row["unique_sender_count"] or 0,
+            "top_senders_24h": top_senders,
+        }
+
+    @staticmethod
+    async def get_most_active_rooms(sender_key: str, limit: int = 5) -> list[tuple[str, str, int]]:
+        """Get channels where a contact has sent the most messages.
+
+        Returns list of (channel_key, channel_name, message_count) tuples.
+        """
+        cursor = await db.conn.execute(
+            """
+            SELECT m.conversation_key, COALESCE(c.name, m.conversation_key) AS channel_name,
+                   COUNT(*) AS cnt
+            FROM messages m
+            LEFT JOIN channels c ON m.conversation_key = c.key
+            WHERE m.type = 'CHAN' AND m.sender_key = ?
+            GROUP BY m.conversation_key
+            ORDER BY cnt DESC
+            LIMIT ?
+            """,
+            (sender_key.lower(), limit),
+        )
+        rows = await cursor.fetchall()
+        return [(row["conversation_key"], row["channel_name"], row["cnt"]) for row in rows]

app/repository/raw_packets.py

@@ -0,0 +1,150 @@
+import logging
+import sqlite3
+import time
+from hashlib import sha256
+
+from app.database import db
+from app.decoder import PayloadType, extract_payload, get_packet_payload_type
+
+logger = logging.getLogger(__name__)
+
+
+class RawPacketRepository:
+    @staticmethod
+    async def create(data: bytes, timestamp: int | None = None) -> tuple[int, bool]:
+        """
+        Create a raw packet with payload-based deduplication.
+
+        Returns (packet_id, is_new) tuple:
+        - is_new=True: New packet stored, packet_id is the new row ID
+        - is_new=False: Duplicate payload detected, packet_id is the existing row ID
+
+        Deduplication is based on the SHA-256 hash of the packet payload
+        (excluding routing/path information).
+        """
+        ts = timestamp if timestamp is not None else int(time.time())
+
+        # Compute payload hash for deduplication
+        payload = extract_payload(data)
+        if payload:
+            payload_hash = sha256(payload).digest()
+        else:
+            # For malformed packets, hash the full data
+            payload_hash = sha256(data).digest()
+
+        # Check if this payload already exists
+        cursor = await db.conn.execute(
+            "SELECT id FROM raw_packets WHERE payload_hash = ?", (payload_hash,)
+        )
+        existing = await cursor.fetchone()
+
+        if existing:
+            # Duplicate - return existing packet ID
+            logger.debug(
+                "Duplicate payload detected (hash=%s..., existing_id=%d)",
+                payload_hash.hex()[:12],
+                existing["id"],
+            )
+            return (existing["id"], False)
+
+        # New packet - insert with hash
+        try:
+            cursor = await db.conn.execute(
+                "INSERT INTO raw_packets (timestamp, data, payload_hash) VALUES (?, ?, ?)",
+                (ts, data, payload_hash),
+            )
+            await db.conn.commit()
+            assert cursor.lastrowid is not None  # INSERT always returns a row ID
+            return (cursor.lastrowid, True)
+        except sqlite3.IntegrityError:
+            # Race condition: another insert with same payload_hash happened between
+            # our SELECT and INSERT. This is expected for duplicate packets arriving
+            # close together. Query again to get the existing ID.
+            logger.debug(
+                "Duplicate packet detected via race condition (payload_hash=%s), dropping",
+                payload_hash.hex()[:16],
+            )
+            cursor = await db.conn.execute(
+                "SELECT id FROM raw_packets WHERE payload_hash = ?", (payload_hash,)
+            )
+            existing = await cursor.fetchone()
+            if existing:
+                return (existing["id"], False)
+            # This shouldn't happen, but if it does, re-raise
+            raise
+
+    @staticmethod
+    async def get_undecrypted_count() -> int:
+        """Get count of undecrypted packets (those without a linked message)."""
+        cursor = await db.conn.execute(
+            "SELECT COUNT(*) as count FROM raw_packets WHERE message_id IS NULL"
+        )
+        row = await cursor.fetchone()
+        return row["count"] if row else 0
+
+    @staticmethod
+    async def get_oldest_undecrypted() -> int | None:
+        """Get timestamp of oldest undecrypted packet, or None if none exist."""
+        cursor = await db.conn.execute(
+            "SELECT MIN(timestamp) as oldest FROM raw_packets WHERE message_id IS NULL"
+        )
+        row = await cursor.fetchone()
+        return row["oldest"] if row and row["oldest"] is not None else None
+
+    @staticmethod
+    async def get_all_undecrypted() -> list[tuple[int, bytes, int]]:
+        """Get all undecrypted packets as (id, data, timestamp) tuples."""
+        cursor = await db.conn.execute(
+            "SELECT id, data, timestamp FROM raw_packets WHERE message_id IS NULL ORDER BY timestamp ASC"
+        )
+        rows = await cursor.fetchall()
+        return [(row["id"], bytes(row["data"]), row["timestamp"]) for row in rows]
+
+    @staticmethod
+    async def mark_decrypted(packet_id: int, message_id: int) -> None:
+        """Link a raw packet to its decrypted message."""
+        await db.conn.execute(
+            "UPDATE raw_packets SET message_id = ? WHERE id = ?",
+            (message_id, packet_id),
+        )
+        await db.conn.commit()
+
+    @staticmethod
+    async def prune_old_undecrypted(max_age_days: int) -> int:
+        """Delete undecrypted packets older than max_age_days. Returns count deleted."""
+        cutoff = int(time.time()) - (max_age_days * 86400)
+        cursor = await db.conn.execute(
+            "DELETE FROM raw_packets WHERE message_id IS NULL AND timestamp < ?",
+            (cutoff,),
+        )
+        await db.conn.commit()
+        return cursor.rowcount
+
+    @staticmethod
+    async def purge_linked_to_messages() -> int:
+        """Delete raw packets that are already linked to a stored message."""
+        cursor = await db.conn.execute("DELETE FROM raw_packets WHERE message_id IS NOT NULL")
+        await db.conn.commit()
+        return cursor.rowcount
+
+    @staticmethod
+    async def get_undecrypted_text_messages() -> list[tuple[int, bytes, int]]:
+        """Get all undecrypted TEXT_MESSAGE packets as (id, data, timestamp) tuples.
+
+        Filters raw packets to only include those with PayloadType.TEXT_MESSAGE (0x02).
+        These are direct messages that can be decrypted with contact ECDH keys.
+        """
+        cursor = await db.conn.execute(
+            "SELECT id, data, timestamp FROM raw_packets WHERE message_id IS NULL ORDER BY timestamp ASC"
+        )
+        rows = await cursor.fetchall()
+
+        # Filter for TEXT_MESSAGE packets
+        result = []
+        for row in rows:
+            data = bytes(row["data"])
+            payload_type = get_packet_payload_type(data)
+            if payload_type == PayloadType.TEXT_MESSAGE:
+                result.append((row["id"], data, row["timestamp"]))
+
+        return result

app/repository/settings.py

@@ -0,0 +1,415 @@
+import json
+import logging
+import time
+from typing import Any, Literal
+
+from app.database import db
+from app.models import AppSettings, Favorite
+from app.path_utils import parse_packet_envelope
+
+logger = logging.getLogger(__name__)
+
+SECONDS_1H = 3600
+SECONDS_24H = 86400
+SECONDS_7D = 604800
+
+
+class AppSettingsRepository:
+    """Repository for app_settings table (single-row pattern)."""
+
+    @staticmethod
+    async def get() -> AppSettings:
+        """Get the current app settings.
+
+        Always returns settings - creates default row if needed (migration handles initial row).
+        """
+        cursor = await db.conn.execute(
+            """
+            SELECT max_radio_contacts, favorites, auto_decrypt_dm_on_advert,
+                   sidebar_sort_order, last_message_times, preferences_migrated,
+                   advert_interval, last_advert_time, flood_scope,
+                   blocked_keys, blocked_names
+            FROM app_settings WHERE id = 1
+            """
+        )
+        row = await cursor.fetchone()
+
+        if not row:
+            # Should not happen after migration, but handle gracefully
+            return AppSettings()
+
+        # Parse favorites JSON
+        favorites = []
+        if row["favorites"]:
+            try:
+                favorites_data = json.loads(row["favorites"])
+                favorites = [Favorite(**f) for f in favorites_data]
+            except (json.JSONDecodeError, TypeError, KeyError) as e:
+                logger.warning(
+                    "Failed to parse favorites JSON, using empty list: %s (data=%r)",
+                    e,
+                    row["favorites"][:100] if row["favorites"] else None,
+                )
+                favorites = []
+
+        # Parse last_message_times JSON
+        last_message_times: dict[str, int] = {}
+        if row["last_message_times"]:
+            try:
+                last_message_times = json.loads(row["last_message_times"])
+            except (json.JSONDecodeError, TypeError) as e:
+                logger.warning(
+                    "Failed to parse last_message_times JSON, using empty dict: %s",
+                    e,
+                )
+                last_message_times = {}
+
+        # Parse blocked_keys JSON
+        blocked_keys: list[str] = []
+        if row["blocked_keys"]:
+            try:
+                blocked_keys = json.loads(row["blocked_keys"])
+            except (json.JSONDecodeError, TypeError):
+                blocked_keys = []
+
+        # Parse blocked_names JSON
+        blocked_names: list[str] = []
+        if row["blocked_names"]:
+            try:
+                blocked_names = json.loads(row["blocked_names"])
+            except (json.JSONDecodeError, TypeError):
+                blocked_names = []
+
+        # Validate sidebar_sort_order (fallback to "recent" if invalid)
+        sort_order = row["sidebar_sort_order"]
+        if sort_order not in ("recent", "alpha"):
+            sort_order = "recent"
+
+        return AppSettings(
+            max_radio_contacts=row["max_radio_contacts"],
+            favorites=favorites,
+            auto_decrypt_dm_on_advert=bool(row["auto_decrypt_dm_on_advert"]),
+            sidebar_sort_order=sort_order,
+            last_message_times=last_message_times,
+            preferences_migrated=bool(row["preferences_migrated"]),
+            advert_interval=row["advert_interval"] or 0,
+            last_advert_time=row["last_advert_time"] or 0,
+            flood_scope=row["flood_scope"] or "",
+            blocked_keys=blocked_keys,
+            blocked_names=blocked_names,
+        )
+
+    @staticmethod
+    async def update(
+        max_radio_contacts: int | None = None,
+        favorites: list[Favorite] | None = None,
+        auto_decrypt_dm_on_advert: bool | None = None,
+        sidebar_sort_order: str | None = None,
+        last_message_times: dict[str, int] | None = None,
+        preferences_migrated: bool | None = None,
+        advert_interval: int | None = None,
+        last_advert_time: int | None = None,
+        flood_scope: str | None = None,
+        blocked_keys: list[str] | None = None,
+        blocked_names: list[str] | None = None,
+    ) -> AppSettings:
+        """Update app settings. Only provided fields are updated."""
+        updates = []
+        params: list[Any] = []
+
+        if max_radio_contacts is not None:
+            updates.append("max_radio_contacts = ?")
+            params.append(max_radio_contacts)
+
+        if favorites is not None:
+            updates.append("favorites = ?")
+            favorites_json = json.dumps([f.model_dump() for f in favorites])
+            params.append(favorites_json)
+
+        if auto_decrypt_dm_on_advert is not None:
+            updates.append("auto_decrypt_dm_on_advert = ?")
+            params.append(1 if auto_decrypt_dm_on_advert else 0)
+
+        if sidebar_sort_order is not None:
+            updates.append("sidebar_sort_order = ?")
+            params.append(sidebar_sort_order)
+
+        if last_message_times is not None:
+            updates.append("last_message_times = ?")
+            params.append(json.dumps(last_message_times))
+
+        if preferences_migrated is not None:
+            updates.append("preferences_migrated = ?")
+            params.append(1 if preferences_migrated else 0)
+
+        if advert_interval is not None:
+            updates.append("advert_interval = ?")
+            params.append(advert_interval)
+
+        if last_advert_time is not None:
+            updates.append("last_advert_time = ?")
+            params.append(last_advert_time)
+
+        if flood_scope is not None:
+            updates.append("flood_scope = ?")
+            params.append(flood_scope)
+
+        if blocked_keys is not None:
+            updates.append("blocked_keys = ?")
+            params.append(json.dumps(blocked_keys))
+
+        if blocked_names is not None:
+            updates.append("blocked_names = ?")
+            params.append(json.dumps(blocked_names))
+
+        if updates:
+            query = f"UPDATE app_settings SET {', '.join(updates)} WHERE id = 1"
+            await db.conn.execute(query, params)
+            await db.conn.commit()
+
+        return await AppSettingsRepository.get()
+
+    @staticmethod
+    async def add_favorite(fav_type: Literal["channel", "contact"], fav_id: str) -> AppSettings:
+        """Add a favorite, avoiding duplicates."""
+        settings = await AppSettingsRepository.get()
+
+        # Check if already favorited
+        if any(f.type == fav_type and f.id == fav_id for f in settings.favorites):
+            return settings
+
+        new_favorites = settings.favorites + [Favorite(type=fav_type, id=fav_id)]
+        return await AppSettingsRepository.update(favorites=new_favorites)
+
+    @staticmethod
+    async def remove_favorite(fav_type: Literal["channel", "contact"], fav_id: str) -> AppSettings:
+        """Remove a favorite."""
+        settings = await AppSettingsRepository.get()
+        new_favorites = [
+            f for f in settings.favorites if not (f.type == fav_type and f.id == fav_id)
+        ]
+        return await AppSettingsRepository.update(favorites=new_favorites)
+
+    @staticmethod
+    async def toggle_blocked_key(key: str) -> AppSettings:
+        """Toggle a public key in the blocked list. Keys are normalized to lowercase."""
+        normalized = key.lower()
+        settings = await AppSettingsRepository.get()
+        if normalized in settings.blocked_keys:
+            new_keys = [k for k in settings.blocked_keys if k != normalized]
+        else:
+            new_keys = settings.blocked_keys + [normalized]
+        return await AppSettingsRepository.update(blocked_keys=new_keys)
+
+    @staticmethod
+    async def toggle_blocked_name(name: str) -> AppSettings:
+        """Toggle a display name in the blocked list."""
+        settings = await AppSettingsRepository.get()
+        if name in settings.blocked_names:
+            new_names = [n for n in settings.blocked_names if n != name]
+        else:
+            new_names = settings.blocked_names + [name]
+        return await AppSettingsRepository.update(blocked_names=new_names)
+
+    @staticmethod
+    async def migrate_preferences_from_frontend(
+        favorites: list[dict],
+        sort_order: str,
+        last_message_times: dict[str, int],
+    ) -> tuple[AppSettings, bool]:
+        """Migrate all preferences from frontend localStorage.
+
+        This is a one-time migration. If already migrated, returns current settings
+        without overwriting. Returns (settings, did_migrate) tuple.
+        """
+        settings = await AppSettingsRepository.get()
+
+        if settings.preferences_migrated:
+            # Already migrated, don't overwrite
+            return settings, False
+
+        # Convert frontend favorites format to Favorite objects
+        new_favorites = []
+        for f in favorites:
+            if f.get("type") in ("channel", "contact") and f.get("id"):
+                new_favorites.append(Favorite(type=f["type"], id=f["id"]))
+
+        # Update with migrated preferences and mark as migrated
+        settings = await AppSettingsRepository.update(
+            favorites=new_favorites,
+            sidebar_sort_order=sort_order if sort_order in ("recent", "alpha") else "recent",
+            last_message_times=last_message_times,
+            preferences_migrated=True,
+        )
+
+        return settings, True
+
+
+class StatisticsRepository:
+    @staticmethod
+    async def _activity_counts(*, contact_type: int, exclude: bool = False) -> dict[str, int]:
+        """Get time-windowed counts for contacts/repeaters heard."""
+        now = int(time.time())
+        op = "!=" if exclude else "="
+        cursor = await db.conn.execute(
+            f"""
+            SELECT
+                SUM(CASE WHEN last_seen >= ? THEN 1 ELSE 0 END) AS last_hour,
+                SUM(CASE WHEN last_seen >= ? THEN 1 ELSE 0 END) AS last_24_hours,
+                SUM(CASE WHEN last_seen >= ? THEN 1 ELSE 0 END) AS last_week
+            FROM contacts
+            WHERE type {op} ? AND last_seen IS NOT NULL
+            """,
+            (now - SECONDS_1H, now - SECONDS_24H, now - SECONDS_7D, contact_type),
+        )
+        row = await cursor.fetchone()
+        assert row is not None  # Aggregate query always returns a row
+        return {
+            "last_hour": row["last_hour"] or 0,
+            "last_24_hours": row["last_24_hours"] or 0,
+            "last_week": row["last_week"] or 0,
+        }
+
+    @staticmethod
+    async def _path_hash_width_24h() -> dict[str, int | float]:
+        """Count parsed raw packets from the last 24h by hop hash width."""
+        now = int(time.time())
+        cursor = await db.conn.execute(
+            "SELECT data FROM raw_packets WHERE timestamp >= ?",
+            (now - SECONDS_24H,),
+        )
+        rows = await cursor.fetchall()
+
+        single_byte = 0
+        double_byte = 0
+        triple_byte = 0
+
+        for row in rows:
+            envelope = parse_packet_envelope(bytes(row["data"]))
+            if envelope is None:
+                continue
+            if envelope.hash_size == 1:
+                single_byte += 1
+            elif envelope.hash_size == 2:
+                double_byte += 1
+            elif envelope.hash_size == 3:
+                triple_byte += 1
+
+        total_packets = single_byte + double_byte + triple_byte
+        if total_packets == 0:
+            return {
+                "total_packets": 0,
+                "single_byte": 0,
+                "double_byte": 0,
+                "triple_byte": 0,
+                "single_byte_pct": 0.0,
+                "double_byte_pct": 0.0,
+                "triple_byte_pct": 0.0,
+            }
+
+        return {
+            "total_packets": total_packets,
+            "single_byte": single_byte,
+            "double_byte": double_byte,
+            "triple_byte": triple_byte,
+            "single_byte_pct": (single_byte / total_packets) * 100,
+            "double_byte_pct": (double_byte / total_packets) * 100,
+            "triple_byte_pct": (triple_byte / total_packets) * 100,
+        }
+
+    @staticmethod
+    async def get_all() -> dict:
+        """Aggregate all statistics from existing tables."""
+        now = int(time.time())
+
+        # Top 5 busiest channels in last 24h
+        cursor = await db.conn.execute(
+            """
+            SELECT m.conversation_key, COALESCE(c.name, m.conversation_key) AS channel_name,
+                   COUNT(*) AS message_count
+            FROM messages m
+            LEFT JOIN channels c ON m.conversation_key = c.key
+            WHERE m.type = 'CHAN' AND m.received_at >= ?
+            GROUP BY m.conversation_key
+            ORDER BY COUNT(*) DESC
+            LIMIT 5
+            """,
+            (now - SECONDS_24H,),
+        )
+        rows = await cursor.fetchall()
+        busiest_channels_24h = [
+            {
+                "channel_key": row["conversation_key"],
+                "channel_name": row["channel_name"],
+                "message_count": row["message_count"],
+            }
+            for row in rows
+        ]
+
+        # Entity counts
+        cursor = await db.conn.execute("SELECT COUNT(*) AS cnt FROM contacts WHERE type != 2")
+        row = await cursor.fetchone()
+        assert row is not None
+        contact_count: int = row["cnt"]
+
+        cursor = await db.conn.execute("SELECT COUNT(*) AS cnt FROM contacts WHERE type = 2")
+        row = await cursor.fetchone()
+        assert row is not None
+        repeater_count: int = row["cnt"]
+
+        cursor = await db.conn.execute("SELECT COUNT(*) AS cnt FROM channels")
+        row = await cursor.fetchone()
+        assert row is not None
+        channel_count: int = row["cnt"]
+
+        # Packet split
+        cursor = await db.conn.execute(
+            """
+            SELECT COUNT(*) AS total,
+                   SUM(CASE WHEN message_id IS NOT NULL THEN 1 ELSE 0 END) AS decrypted
+            FROM raw_packets
+            """
+        )
+        pkt_row = await cursor.fetchone()
+        assert pkt_row is not None
+        total_packets = pkt_row["total"] or 0
+        decrypted_packets = pkt_row["decrypted"] or 0
+        undecrypted_packets = total_packets - decrypted_packets
+
+        # Message type counts
+        cursor = await db.conn.execute("SELECT COUNT(*) AS cnt FROM messages WHERE type = 'PRIV'")
+        row = await cursor.fetchone()
+        assert row is not None
+        total_dms: int = row["cnt"]
+
+        cursor = await db.conn.execute("SELECT COUNT(*) AS cnt FROM messages WHERE type = 'CHAN'")
+        row = await cursor.fetchone()
+        assert row is not None
+        total_channel_messages: int = row["cnt"]
+
+        # Outgoing count
+        cursor = await db.conn.execute("SELECT COUNT(*) AS cnt FROM messages WHERE outgoing = 1")
+        row = await cursor.fetchone()
+        assert row is not None
+        total_outgoing: int = row["cnt"]
+
+        # Activity windows
+        contacts_heard = await StatisticsRepository._activity_counts(contact_type=2, exclude=True)
+        repeaters_heard = await StatisticsRepository._activity_counts(contact_type=2)
+        path_hash_width_24h = await StatisticsRepository._path_hash_width_24h()
+
+        return {
+            "busiest_channels_24h": busiest_channels_24h,
+            "contact_count": contact_count,
+            "repeater_count": repeater_count,
+            "channel_count": channel_count,
+            "total_packets": total_packets,
+            "decrypted_packets": decrypted_packets,
+            "undecrypted_packets": undecrypted_packets,
+            "total_dms": total_dms,
+            "total_channel_messages": total_channel_messages,
+            "total_outgoing": total_outgoing,
+            "contacts_heard": contacts_heard,
+            "repeaters_heard": repeaters_heard,
+            "path_hash_width_24h": path_hash_width_24h,
+        }

app/routers/channels.py

@@ -6,9 +6,10 @@ from meshcore import EventType
 from pydantic import BaseModel, Field
 
 from app.dependencies import require_connected
-from app.models import Channel
-from app.radio_sync import ensure_default_channels
-from app.repository import ChannelRepository
+from app.models import Channel, ChannelDetail, ChannelMessageCounts, ChannelTopSender
+from app.radio import radio_manager
+from app.radio_sync import upsert_channel_from_radio_slot
+from app.repository import ChannelRepository, MessageRepository
 
 logger = logging.getLogger(__name__)
 router = APIRouter(prefix="/channels", tags=["channels"])
@@ -25,11 +26,27 @@ class CreateChannelRequest(BaseModel):
 @router.get("", response_model=list[Channel])
 async def list_channels() -> list[Channel]:
     """List all channels from the database."""
-    # Ensure Public channel always exists (self-healing)
-    await ensure_default_channels()
     return await ChannelRepository.get_all()
 
 
+@router.get("/{key}/detail", response_model=ChannelDetail)
+async def get_channel_detail(key: str) -> ChannelDetail:
+    """Get comprehensive channel profile data with message statistics."""
+    channel = await ChannelRepository.get_by_key(key)
+    if not channel:
+        raise HTTPException(status_code=404, detail="Channel not found")
+
+    stats = await MessageRepository.get_channel_stats(channel.key)
+
+    return ChannelDetail(
+        channel=channel,
+        message_counts=ChannelMessageCounts(**stats["message_counts"]),
+        first_message_at=stats["first_message_at"],
+        unique_sender_count=stats["unique_sender_count"],
+        top_senders_24h=[ChannelTopSender(**s) for s in stats["top_senders_24h"]],
+    )
+
+
 @router.get("/{key}", response_model=Channel)
 async def get_channel(key: str) -> Channel:
     """Get a specific channel by key (32-char hex string)."""
@@ -84,35 +101,22 @@ async def create_channel(request: CreateChannelRequest) -> Channel:
 @router.post("/sync")
 async def sync_channels_from_radio(max_channels: int = Query(default=40, ge=1, le=40)) -> dict:
     """Sync channels from the radio to the database."""
-    mc = require_connected()
+    require_connected()
 
     logger.info("Syncing channels from radio (checking %d slots)", max_channels)
     count = 0
 
-    for idx in range(max_channels):
-        result = await mc.commands.get_channel(idx)
+    async with radio_manager.radio_operation("sync_channels_from_radio") as mc:
+        for idx in range(max_channels):
+            result = await mc.commands.get_channel(idx)
 
-        if result.type == EventType.CHANNEL_INFO:
-            payload = result.payload
-            name = payload.get("channel_name", "")
-            secret = payload.get("channel_secret", b"")
-
-            # Skip empty channels
-            if not name or name == "\x00" * len(name):
-                continue
-
-            is_hashtag = name.startswith("#")
-            key_bytes = secret if isinstance(secret, bytes) else bytes(secret)
-            key_hex = key_bytes.hex().upper()
-
-            await ChannelRepository.upsert(
-                key=key_hex,
-                name=name,
-                is_hashtag=is_hashtag,
-                on_radio=True,
-            )
-            count += 1
-            logger.debug("Synced channel %s: %s", key_hex, name)
+            if result.type == EventType.CHANNEL_INFO:
+                key_hex = await upsert_channel_from_radio_slot(result.payload, on_radio=True)
+                if key_hex is not None:
+                    count += 1
+                    logger.debug(
+                        "Synced channel %s: %s", key_hex, result.payload.get("channel_name")
+                    )
 
     logger.info("Synced %d channels from radio", count)
     return {"synced": count}
@@ -141,4 +145,9 @@ async def delete_channel(key: str) -> dict:
     """
     logger.info("Deleting channel %s from database", key)
     await ChannelRepository.delete(key)
+
+    from app.websocket import broadcast_event
+
+    broadcast_event("channel_deleted", {"key": key})
+
     return {"status": "ok"}

app/routers/contacts.py

@@ -1,66 +1,62 @@
-import asyncio
 import logging
+import random
 
 from fastapi import APIRouter, BackgroundTasks, HTTPException, Query
 from meshcore import EventType
 
 from app.dependencies import require_connected
 from app.models import (
-    CONTACT_TYPE_REPEATER,
-    AclEntry,
-    CommandRequest,
-    CommandResponse,
     Contact,
+    ContactActiveRoom,
+    ContactAdvertPath,
+    ContactAdvertPathSummary,
+    ContactDetail,
     CreateContactRequest,
-    NeighborInfo,
-    TelemetryRequest,
-    TelemetryResponse,
+    NearestRepeater,
+    TraceResponse,
 )
 from app.packet_processor import start_historical_dm_decryption
 from app.radio import radio_manager
-from app.radio_sync import pause_polling
-from app.repository import ContactRepository
+from app.repository import (
+    AmbiguousPublicKeyPrefixError,
+    ContactAdvertPathRepository,
+    ContactNameHistoryRepository,
+    ContactRepository,
+    MessageRepository,
+)
 
 logger = logging.getLogger(__name__)
 
-# ACL permission level names
-ACL_PERMISSION_NAMES = {
-    0: "Guest",
-    1: "Read-only",
-    2: "Read-write",
-    3: "Admin",
-}
 router = APIRouter(prefix="/contacts", tags=["contacts"])
 
-# Delay between repeater radio operations to allow key exchange and path establishment
-REPEATER_OP_DELAY_SECONDS = 2.0
+
+def _ambiguous_contact_detail(err: AmbiguousPublicKeyPrefixError) -> str:
+    sample = ", ".join(key[:12] for key in err.matches[:2])
+    return (
+        f"Ambiguous contact key prefix '{err.prefix}'. "
+        f"Use a full 64-character public key. Matching contacts: {sample}"
+    )
 
 
-async def prepare_repeater_connection(mc, contact: Contact, password: str) -> None:
-    """Prepare connection to a repeater by adding to radio and logging in.
+async def _resolve_contact_or_404(
+    public_key: str, not_found_detail: str = "Contact not found"
+) -> Contact:
+    try:
+        contact = await ContactRepository.get_by_key_or_prefix(public_key)
+    except AmbiguousPublicKeyPrefixError as err:
+        raise HTTPException(status_code=409, detail=_ambiguous_contact_detail(err)) from err
+    if not contact:
+        raise HTTPException(status_code=404, detail=not_found_detail)
+    return contact
 
-    Args:
-        mc: MeshCore instance
-        contact: The repeater contact
-        password: Password for login (empty string for no password)
 
-    Raises:
-        HTTPException: If login fails
-    """
-    # Add contact to radio with path from DB
-    logger.info("Adding repeater %s to radio", contact.public_key[:12])
-    await mc.commands.add_contact(contact.to_radio_dict())
-
-    # Send login with password
-    logger.info("Sending login to repeater %s", contact.public_key[:12])
-    login_result = await mc.commands.send_login(contact.public_key, password)
-
-    if login_result.type == EventType.ERROR:
-        raise HTTPException(status_code=401, detail=f"Login failed: {login_result.payload}")
-
-    # Wait for key exchange to complete before sending requests
-    logger.debug("Waiting %.1fs for key exchange to complete", REPEATER_OP_DELAY_SECONDS)
-    await asyncio.sleep(REPEATER_OP_DELAY_SECONDS)
+async def _ensure_on_radio(mc, contact: Contact) -> None:
+    """Add a contact to the radio for routing, raising 500 on failure."""
+    add_result = await mc.commands.add_contact(contact.to_radio_dict())
+    if add_result is not None and add_result.type == EventType.ERROR:
+        raise HTTPException(
+            status_code=500, detail=f"Failed to add contact to radio: {add_result.payload}"
+        )
 
 
 @router.get("", response_model=list[Contact])
@@ -72,6 +68,20 @@ async def list_contacts(
     return await ContactRepository.get_all(limit=limit, offset=offset)
 
 
+@router.get("/repeaters/advert-paths", response_model=list[ContactAdvertPathSummary])
+async def list_repeater_advert_paths(
+    limit_per_repeater: int = Query(default=10, ge=1, le=50),
+) -> list[ContactAdvertPathSummary]:
+    """List recent unique advert paths for all repeaters.
+
+    Note: This endpoint now returns paths for all contacts (table was renamed).
+    The route is kept for backward compatibility.
+    """
+    return await ContactAdvertPathRepository.get_recent_for_all_contacts(
+        limit_per_contact=limit_per_repeater
+    )
+
+
 @router.post("", response_model=Contact)
 async def create_contact(
     request: CreateContactRequest, background_tasks: BackgroundTasks
@@ -88,7 +98,7 @@ async def create_contact(
         raise HTTPException(status_code=400, detail="Invalid public key: must be valid hex") from e
 
     # Check if contact already exists
-    existing = await ContactRepository.get_by_key_or_prefix(request.public_key)
+    existing = await ContactRepository.get_by_key(request.public_key)
     if existing:
         # Update name if provided
         if request.name:
@@ -100,6 +110,7 @@ async def create_contact(
                     "flags": existing.flags,
                     "last_path": existing.last_path,
                     "last_path_len": existing.last_path_len,
+                    "out_path_hash_mode": existing.out_path_hash_mode,
                     "last_advert": existing.last_advert,
                     "lat": existing.lat,
                     "lon": existing.lon,
@@ -108,7 +119,9 @@ async def create_contact(
                     "last_contacted": existing.last_contacted,
                 }
             )
-            existing.name = request.name
+            refreshed = await ContactRepository.get_by_key(request.public_key)
+            if refreshed is not None:
+                existing = refreshed
 
         # Trigger historical decryption if requested (even for existing contacts)
         if request.try_historical:
@@ -119,13 +132,15 @@ async def create_contact(
         return existing
 
     # Create new contact
+    lower_key = request.public_key.lower()
     contact_data = {
-        "public_key": request.public_key,
+        "public_key": lower_key,
         "name": request.name,
         "type": 0,  # Unknown
         "flags": 0,
         "last_path": None,
         "last_path_len": -1,
+        "out_path_hash_mode": -1,
         "last_advert": None,
         "lat": None,
         "lon": None,
@@ -134,32 +149,131 @@ async def create_contact(
         "last_contacted": None,
     }
     await ContactRepository.upsert(contact_data)
-    logger.info("Created contact %s", request.public_key[:12])
+    logger.info("Created contact %s", lower_key[:12])
+
+    # Promote any prefix-stored messages to this full key
+    claimed = await MessageRepository.claim_prefix_messages(lower_key)
+    if claimed > 0:
+        logger.info("Claimed %d prefix messages for contact %s", claimed, lower_key[:12])
+
+    # Backfill sender_key on channel messages that match this contact's name
+    if request.name:
+        backfilled = await MessageRepository.backfill_channel_sender_key(lower_key, request.name)
+        if backfilled > 0:
+            logger.info(
+                "Backfilled sender_key on %d channel message(s) for %s", backfilled, request.name
+            )
 
     # Trigger historical decryption if requested
     if request.try_historical:
-        await start_historical_dm_decryption(background_tasks, request.public_key, request.name)
+        await start_historical_dm_decryption(background_tasks, lower_key, request.name)
 
     return Contact(**contact_data)
 
 
+@router.get("/{public_key}/detail", response_model=ContactDetail)
+async def get_contact_detail(public_key: str) -> ContactDetail:
+    """Get comprehensive contact profile data.
+
+    Returns contact info, name history, message counts, most active rooms,
+    advertisement paths, advert frequency, and nearest repeaters.
+    """
+    contact = await _resolve_contact_or_404(public_key)
+
+    name_history = await ContactNameHistoryRepository.get_history(contact.public_key)
+    dm_count = await MessageRepository.count_dm_messages(contact.public_key)
+    chan_count = await MessageRepository.count_channel_messages_by_sender(contact.public_key)
+    active_rooms_raw = await MessageRepository.get_most_active_rooms(contact.public_key)
+    advert_paths = await ContactAdvertPathRepository.get_recent_for_contact(contact.public_key)
+
+    most_active_rooms = [
+        ContactActiveRoom(channel_key=key, channel_name=name, message_count=count)
+        for key, name, count in active_rooms_raw
+    ]
+
+    # Compute advert observation rate (observations/hour) from path data.
+    # Note: a single advertisement can arrive via multiple paths, so this counts
+    # RF observations, not unique advertisement broadcasts.
+    advert_frequency: float | None = None
+    if advert_paths:
+        total_observations = sum(p.heard_count for p in advert_paths)
+        earliest = min(p.first_seen for p in advert_paths)
+        latest = max(p.last_seen for p in advert_paths)
+        span_hours = (latest - earliest) / 3600.0
+        if span_hours > 0:
+            advert_frequency = round(total_observations / span_hours, 2)
+
+    # Compute nearest repeaters from first-hop prefixes in advert paths
+    first_hop_stats: dict[str, dict] = {}  # prefix -> {heard_count, path_len, last_seen}
+    for p in advert_paths:
+        prefix = p.next_hop
+        if prefix:
+            if prefix not in first_hop_stats:
+                first_hop_stats[prefix] = {
+                    "heard_count": 0,
+                    "path_len": p.path_len,
+                    "last_seen": p.last_seen,
+                }
+            first_hop_stats[prefix]["heard_count"] += p.heard_count
+            first_hop_stats[prefix]["last_seen"] = max(
+                first_hop_stats[prefix]["last_seen"], p.last_seen
+            )
+
+    # Resolve all first-hop prefixes to contacts in a single query
+    resolved_contacts = await ContactRepository.resolve_prefixes(list(first_hop_stats.keys()))
+
+    nearest_repeaters: list[NearestRepeater] = []
+    for prefix, stats in first_hop_stats.items():
+        resolved = resolved_contacts.get(prefix)
+        nearest_repeaters.append(
+            NearestRepeater(
+                public_key=resolved.public_key if resolved else prefix,
+                name=resolved.name if resolved else None,
+                path_len=stats["path_len"],
+                last_seen=stats["last_seen"],
+                heard_count=stats["heard_count"],
+            )
+        )
+
+    nearest_repeaters.sort(key=lambda r: r.heard_count, reverse=True)
+
+    return ContactDetail(
+        contact=contact,
+        name_history=name_history,
+        dm_message_count=dm_count,
+        channel_message_count=chan_count,
+        most_active_rooms=most_active_rooms,
+        advert_paths=advert_paths,
+        advert_frequency=advert_frequency,
+        nearest_repeaters=nearest_repeaters,
+    )
+
+
 @router.get("/{public_key}", response_model=Contact)
 async def get_contact(public_key: str) -> Contact:
     """Get a specific contact by public key or prefix."""
-    contact = await ContactRepository.get_by_key_or_prefix(public_key)
-    if not contact:
-        raise HTTPException(status_code=404, detail="Contact not found")
-    return contact
+    return await _resolve_contact_or_404(public_key)
+
+
+@router.get("/{public_key}/advert-paths", response_model=list[ContactAdvertPath])
+async def get_contact_advert_paths(
+    public_key: str,
+    limit: int = Query(default=10, ge=1, le=50),
+) -> list[ContactAdvertPath]:
+    """List recent unique advert paths for a contact."""
+    contact = await _resolve_contact_or_404(public_key)
+    return await ContactAdvertPathRepository.get_recent_for_contact(contact.public_key, limit)
 
 
 @router.post("/sync")
 async def sync_contacts_from_radio() -> dict:
     """Sync contacts from the radio to the database."""
-    mc = require_connected()
+    require_connected()
 
     logger.info("Syncing contacts from radio")
 
-    result = await mc.commands.get_contacts()
+    async with radio_manager.radio_operation("sync_contacts_from_radio") as mc:
+        result = await mc.commands.get_contacts()
 
     if result.type == EventType.ERROR:
         raise HTTPException(status_code=500, detail=f"Failed to get contacts: {result.payload}")
@@ -167,12 +281,30 @@ async def sync_contacts_from_radio() -> dict:
     contacts = result.payload
     count = 0
 
+    synced_keys: list[str] = []
     for public_key, contact_data in contacts.items():
+        lower_key = public_key.lower()
         await ContactRepository.upsert(
-            Contact.from_radio_dict(public_key, contact_data, on_radio=True)
+            Contact.from_radio_dict(lower_key, contact_data, on_radio=True)
         )
+        synced_keys.append(lower_key)
+        claimed = await MessageRepository.claim_prefix_messages(lower_key)
+        if claimed > 0:
+            logger.info("Claimed %d prefix DM message(s) for contact %s", claimed, public_key[:12])
+        adv_name = contact_data.get("adv_name")
+        if adv_name:
+            backfilled = await MessageRepository.backfill_channel_sender_key(lower_key, adv_name)
+            if backfilled > 0:
+                logger.info(
+                    "Backfilled sender_key on %d channel message(s) for %s",
+                    backfilled,
+                    adv_name,
+                )
         count += 1
 
+    # Clear on_radio for contacts not found on the radio
+    await ContactRepository.clear_on_radio_except(synced_keys)
+
     logger.info("Synced %d contacts from radio", count)
     return {"synced": count}
 
@@ -180,25 +312,26 @@ async def sync_contacts_from_radio() -> dict:
 @router.post("/{public_key}/remove-from-radio")
 async def remove_contact_from_radio(public_key: str) -> dict:
     """Remove a contact from the radio (keeps it in database)."""
-    mc = require_connected()
+    require_connected()
 
-    contact = await ContactRepository.get_by_key_or_prefix(public_key)
-    if not contact:
-        raise HTTPException(status_code=404, detail="Contact not found")
+    contact = await _resolve_contact_or_404(public_key)
 
-    # Get the contact from radio
-    radio_contact = mc.get_contact_by_key_prefix(contact.public_key[:12])
-    if not radio_contact:
-        # Already not on radio
-        await ContactRepository.set_on_radio(contact.public_key, False)
-        return {"status": "ok", "message": "Contact was not on radio"}
+    async with radio_manager.radio_operation("remove_contact_from_radio") as mc:
+        # Get the contact from radio
+        radio_contact = mc.get_contact_by_key_prefix(contact.public_key[:12])
+        if not radio_contact:
+            # Already not on radio
+            await ContactRepository.set_on_radio(contact.public_key, False)
+            return {"status": "ok", "message": "Contact was not on radio"}
 
-    logger.info("Removing contact %s from radio", contact.public_key[:12])
+        logger.info("Removing contact %s from radio", contact.public_key[:12])
 
-    result = await mc.commands.remove_contact(radio_contact)
+        result = await mc.commands.remove_contact(radio_contact)
 
-    if result.type == EventType.ERROR:
-        raise HTTPException(status_code=500, detail=f"Failed to remove contact: {result.payload}")
+        if result.type == EventType.ERROR:
+            raise HTTPException(
+                status_code=500, detail=f"Failed to remove contact: {result.payload}"
+            )
 
     await ContactRepository.set_on_radio(contact.public_key, False)
     return {"status": "ok"}
@@ -207,23 +340,22 @@ async def remove_contact_from_radio(public_key: str) -> dict:
 @router.post("/{public_key}/add-to-radio")
 async def add_contact_to_radio(public_key: str) -> dict:
     """Add a contact from the database to the radio."""
-    mc = require_connected()
+    require_connected()
 
-    contact = await ContactRepository.get_by_key_or_prefix(public_key)
-    if not contact:
-        raise HTTPException(status_code=404, detail="Contact not found in database")
+    contact = await _resolve_contact_or_404(public_key, "Contact not found in database")
 
-    # Check if already on radio
-    radio_contact = mc.get_contact_by_key_prefix(contact.public_key[:12])
-    if radio_contact:
-        return {"status": "ok", "message": "Contact already on radio"}
+    async with radio_manager.radio_operation("add_contact_to_radio") as mc:
+        # Check if already on radio
+        radio_contact = mc.get_contact_by_key_prefix(contact.public_key[:12])
+        if radio_contact:
+            return {"status": "ok", "message": "Contact already on radio"}
 
-    logger.info("Adding contact %s to radio", contact.public_key[:12])
+        logger.info("Adding contact %s to radio", contact.public_key[:12])
 
-    result = await mc.commands.add_contact(contact.to_radio_dict())
+        result = await mc.commands.add_contact(contact.to_radio_dict())
 
-    if result.type == EventType.ERROR:
-        raise HTTPException(status_code=500, detail=f"Failed to add contact: {result.payload}")
+        if result.type == EventType.ERROR:
+            raise HTTPException(status_code=500, detail=f"Failed to add contact: {result.payload}")
 
     await ContactRepository.set_on_radio(contact.public_key, True)
     return {"status": "ok"}
@@ -232,9 +364,7 @@ async def add_contact_to_radio(public_key: str) -> dict:
 @router.post("/{public_key}/mark-read")
 async def mark_contact_read(public_key: str) -> dict:
     """Mark a contact conversation as read (update last_read_at timestamp)."""
-    contact = await ContactRepository.get_by_key_or_prefix(public_key)
-    if not contact:
-        raise HTTPException(status_code=404, detail="Contact not found")
+    contact = await _resolve_contact_or_404(public_key)
 
     updated = await ContactRepository.update_last_read_at(contact.public_key)
     if not updated:
@@ -246,241 +376,112 @@ async def mark_contact_read(public_key: str) -> dict:
 @router.delete("/{public_key}")
 async def delete_contact(public_key: str) -> dict:
     """Delete a contact from the database (and radio if present)."""
-    contact = await ContactRepository.get_by_key_or_prefix(public_key)
-    if not contact:
-        raise HTTPException(status_code=404, detail="Contact not found")
+    contact = await _resolve_contact_or_404(public_key)
 
     # Remove from radio if connected and contact is on radio
-    if radio_manager.is_connected and radio_manager.meshcore:
-        mc = radio_manager.meshcore
-        radio_contact = mc.get_contact_by_key_prefix(contact.public_key[:12])
-        if radio_contact:
-            logger.info("Removing contact %s from radio before deletion", contact.public_key[:12])
-            await mc.commands.remove_contact(radio_contact)
+    if radio_manager.is_connected:
+        async with radio_manager.radio_operation("delete_contact_from_radio") as mc:
+            radio_contact = mc.get_contact_by_key_prefix(contact.public_key[:12])
+            if radio_contact:
+                logger.info(
+                    "Removing contact %s from radio before deletion", contact.public_key[:12]
+                )
+                await mc.commands.remove_contact(radio_contact)
 
     # Delete from database
     await ContactRepository.delete(contact.public_key)
     logger.info("Deleted contact %s", contact.public_key[:12])
 
+    from app.websocket import broadcast_event
+
+    broadcast_event("contact_deleted", {"public_key": contact.public_key})
+
     return {"status": "ok"}
 
 
-@router.post("/{public_key}/telemetry", response_model=TelemetryResponse)
-async def request_telemetry(public_key: str, request: TelemetryRequest) -> TelemetryResponse:
-    """Request telemetry from a repeater.
+@router.post("/{public_key}/trace", response_model=TraceResponse)
+async def request_trace(public_key: str) -> TraceResponse:
+    """Send a single-hop trace to a contact and wait for the result.
 
-    The contact must be a repeater (type=2). If not on the radio, it will be added.
-    Uses login + status request with retry logic.
+    The trace path contains the contact's 1-byte pubkey hash as the sole hop
+    (no intermediate repeaters). The radio firmware requires at least one
+    node in the path.
     """
-    mc = require_connected()
+    require_connected()
 
-    # Get contact from database
-    contact = await ContactRepository.get_by_key_or_prefix(public_key)
-    if not contact:
-        raise HTTPException(status_code=404, detail="Contact not found")
+    contact = await _resolve_contact_or_404(public_key)
 
-    # Verify it's a repeater
-    if contact.type != CONTACT_TYPE_REPEATER:
-        raise HTTPException(
-            status_code=400,
-            detail=f"Contact is not a repeater (type={contact.type}, expected {CONTACT_TYPE_REPEATER})",
+    tag = random.randint(1, 0xFFFFFFFF)
+    # First 2 hex chars of pubkey = 1-byte hash used by the trace protocol
+    contact_hash = contact.public_key[:2]
+
+    # Trace does not need auto-fetch suspension: response arrives as TRACE_DATA
+    # from the reader loop, not via get_msg().
+    async with radio_manager.radio_operation("request_trace", pause_polling=True) as mc:
+        # Ensure contact is on radio so the trace can reach them
+        await _ensure_on_radio(mc, contact)
+
+        logger.info(
+            "Sending trace to %s (tag=%d, hash=%s)", contact.public_key[:12], tag, contact_hash
+        )
+        result = await mc.commands.send_trace(path=contact_hash, tag=tag)
+
+        if result.type == EventType.ERROR:
+            raise HTTPException(status_code=500, detail=f"Failed to send trace: {result.payload}")
+
+        # Wait for the matching TRACE_DATA event
+        event = await mc.wait_for_event(
+            EventType.TRACE_DATA,
+            attribute_filters={"tag": tag},
+            timeout=15,
         )
 
-    # Prepare connection (add/remove dance + login)
-    await prepare_repeater_connection(mc, contact, request.password)
+    if event is None:
+        raise HTTPException(status_code=504, detail="No trace response heard")
 
-    # Request status with retries
-    logger.info("Requesting status from repeater %s", contact.public_key[:12])
-    status = None
-    for attempt in range(1, 4):
-        logger.debug("Status request attempt %d/3", attempt)
-        status = await mc.commands.req_status_sync(contact.public_key, timeout=10, min_timeout=5)
-        if status:
-            break
-        logger.debug("Status request timeout, retrying...")
+    trace = event.payload
+    path = trace.get("path", [])
+    path_len = trace.get("path_len", 0)
 
-    if not status:
-        raise HTTPException(status_code=504, detail="No response from repeater after 3 attempts")
+    # remote_snr: first entry in path (what the target heard us at)
+    remote_snr = path[0]["snr"] if path else None
+    # local_snr: last entry in path (what we heard them at on the bounce-back)
+    local_snr = path[-1]["snr"] if path else None
 
-    logger.info("Received telemetry from %s: %s", contact.public_key[:12], status)
-
-    # Fetch neighbors (fetch_all_neighbours handles pagination)
-    logger.info("Fetching neighbors from repeater %s", contact.public_key[:12])
-    neighbors_data = None
-    for attempt in range(1, 4):
-        logger.debug("Neighbors request attempt %d/3", attempt)
-        neighbors_data = await mc.commands.fetch_all_neighbours(
-            contact.public_key, timeout=10, min_timeout=5
-        )
-        if neighbors_data:
-            break
-        logger.debug("Neighbors request timeout, retrying...")
-
-    # Process neighbors - resolve pubkey prefixes to contact names
-    neighbors: list[NeighborInfo] = []
-    if neighbors_data and "neighbours" in neighbors_data:
-        logger.info("Received %d neighbors", len(neighbors_data["neighbours"]))
-        for n in neighbors_data["neighbours"]:
-            pubkey_prefix = n.get("pubkey", "")
-            # Try to resolve to a contact name from our database
-            resolved_contact = await ContactRepository.get_by_key_prefix(pubkey_prefix)
-            neighbors.append(
-                NeighborInfo(
-                    pubkey_prefix=pubkey_prefix,
-                    name=resolved_contact.name if resolved_contact else None,
-                    snr=n.get("snr", 0.0),
-                    last_heard_seconds=n.get("secs_ago", 0),
-                )
-            )
-
-    # Fetch ACL
-    logger.info("Fetching ACL from repeater %s", contact.public_key[:12])
-    acl_data = None
-    for attempt in range(1, 4):
-        logger.debug("ACL request attempt %d/3", attempt)
-        acl_data = await mc.commands.req_acl_sync(contact.public_key, timeout=10, min_timeout=5)
-        if acl_data:
-            break
-        logger.debug("ACL request timeout, retrying...")
-
-    # Process ACL - resolve pubkey prefixes to contact names
-    acl_entries: list[AclEntry] = []
-    if acl_data and isinstance(acl_data, list):
-        logger.info("Received %d ACL entries", len(acl_data))
-        for entry in acl_data:
-            pubkey_prefix = entry.get("key", "")
-            perm = entry.get("perm", 0)
-            # Try to resolve to a contact name from our database
-            resolved_contact = await ContactRepository.get_by_key_prefix(pubkey_prefix)
-            acl_entries.append(
-                AclEntry(
-                    pubkey_prefix=pubkey_prefix,
-                    name=resolved_contact.name if resolved_contact else None,
-                    permission=perm,
-                    permission_name=ACL_PERMISSION_NAMES.get(perm, f"Unknown({perm})"),
-                )
-            )
-
-    # Convert raw telemetry to response format
-    # bat is in mV, convert to V (e.g., 3775 -> 3.775)
-    return TelemetryResponse(
-        pubkey_prefix=status.get("pubkey_pre", contact.public_key[:12]),
-        battery_volts=status.get("bat", 0) / 1000.0,
-        tx_queue_len=status.get("tx_queue_len", 0),
-        noise_floor_dbm=status.get("noise_floor", 0),
-        last_rssi_dbm=status.get("last_rssi", 0),
-        last_snr_db=status.get("last_snr", 0.0),
-        packets_received=status.get("nb_recv", 0),
-        packets_sent=status.get("nb_sent", 0),
-        airtime_seconds=status.get("airtime", 0),
-        rx_airtime_seconds=status.get("rx_airtime", 0),
-        uptime_seconds=status.get("uptime", 0),
-        sent_flood=status.get("sent_flood", 0),
-        sent_direct=status.get("sent_direct", 0),
-        recv_flood=status.get("recv_flood", 0),
-        recv_direct=status.get("recv_direct", 0),
-        flood_dups=status.get("flood_dups", 0),
-        direct_dups=status.get("direct_dups", 0),
-        full_events=status.get("full_evts", 0),
-        neighbors=neighbors,
-        acl=acl_entries,
+    logger.info(
+        "Trace result for %s: path_len=%d, remote_snr=%s, local_snr=%s",
+        contact.public_key[:12],
+        path_len,
+        remote_snr,
+        local_snr,
     )
 
+    return TraceResponse(remote_snr=remote_snr, local_snr=local_snr, path_len=path_len)
 
-@router.post("/{public_key}/command", response_model=CommandResponse)
-async def send_repeater_command(public_key: str, request: CommandRequest) -> CommandResponse:
-    """Send a CLI command to a repeater.
 
-    The contact must be a repeater (type=2). The user must have already logged in
-    via the telemetry endpoint. This endpoint ensures the contact is on the radio
-    before sending commands (the repeater remembers ACL permissions after login).
+@router.post("/{public_key}/reset-path")
+async def reset_contact_path(public_key: str) -> dict:
+    """Reset a contact's routing path to flood."""
+    contact = await _resolve_contact_or_404(public_key)
 
-    Common commands:
-    - get name, set name <value>
-    - get tx, set tx <dbm>
-    - get radio, set radio <freq,bw,sf,cr>
-    - tempradio <freq,bw,sf,cr,minutes>
-    - setperm <pubkey> <permission>  (0=guest, 1=read-only, 2=read-write, 3=admin)
-    - clock, clock sync
-    - reboot
-    - ver
-    """
-    mc = require_connected()
-
-    # Get contact from database
-    contact = await ContactRepository.get_by_key_or_prefix(public_key)
-    if not contact:
-        raise HTTPException(status_code=404, detail="Contact not found")
-
-    # Verify it's a repeater
-    if contact.type != CONTACT_TYPE_REPEATER:
-        raise HTTPException(
-            status_code=400,
-            detail=f"Contact is not a repeater (type={contact.type}, expected {CONTACT_TYPE_REPEATER})",
-        )
-
-    # Pause message polling to prevent it from stealing our response
-    async with pause_polling():
-        # Stop auto-fetch to prevent race condition where it consumes our CLI response
-        # before we can call get_msg(). This was causing every other command to fail
-        # with {'messages_available': False}.
-        await mc.stop_auto_message_fetching()
+    await ContactRepository.update_path(contact.public_key, "", -1, -1)
+    logger.info("Reset path to flood for %s", contact.public_key[:12])
 
+    # Push the updated path to radio if connected and contact is on radio
+    if radio_manager.is_connected and contact.on_radio:
         try:
-            # Add contact to radio with path from DB
-            logger.info("Adding repeater %s to radio", contact.public_key[:12])
-            await mc.commands.add_contact(contact.to_radio_dict())
+            updated = await ContactRepository.get_by_key(contact.public_key)
+            if updated:
+                async with radio_manager.radio_operation("reset_path_on_radio") as mc:
+                    await mc.commands.add_contact(updated.to_radio_dict())
+        except Exception:
+            logger.warning("Failed to push flood path to radio for %s", contact.public_key[:12])
 
-            # Send the command
-            logger.info(
-                "Sending command to repeater %s: %s", contact.public_key[:12], request.command
-            )
+    # Broadcast updated contact so frontend refreshes
+    from app.websocket import broadcast_event
 
-            send_result = await mc.commands.send_cmd(contact.public_key, request.command)
+    updated_contact = await ContactRepository.get_by_key(contact.public_key)
+    if updated_contact:
+        broadcast_event("contact", updated_contact.model_dump())
 
-            if send_result.type == EventType.ERROR:
-                raise HTTPException(
-                    status_code=500, detail=f"Failed to send command: {send_result.payload}"
-                )
-
-            # Wait for response (MESSAGES_WAITING event, then get_msg)
-            try:
-                wait_result = await mc.wait_for_event(EventType.MESSAGES_WAITING, timeout=10.0)
-
-                if wait_result is None:
-                    # Timeout - no response received
-                    logger.warning(
-                        "No response from repeater %s for command: %s",
-                        contact.public_key[:12],
-                        request.command,
-                    )
-                    return CommandResponse(
-                        command=request.command,
-                        response="(no response - command may have been processed)",
-                    )
-
-                response_event = await mc.commands.get_msg()
-
-                if response_event.type == EventType.ERROR:
-                    return CommandResponse(
-                        command=request.command, response=f"(error: {response_event.payload})"
-                    )
-
-                # Extract the response text and timestamp from the payload
-                response_text = response_event.payload.get("text", str(response_event.payload))
-                sender_timestamp = response_event.payload.get("timestamp")
-                logger.info("Received response from %s: %s", contact.public_key[:12], response_text)
-
-                return CommandResponse(
-                    command=request.command,
-                    response=response_text,
-                    sender_timestamp=sender_timestamp,
-                )
-            except Exception as e:
-                logger.error("Error waiting for response: %s", e)
-                return CommandResponse(
-                    command=request.command, response=f"(error waiting for response: {e})"
-                )
-        finally:
-            # Always restart auto-fetch, even if an error occurred
-            await mc.start_auto_message_fetching()
+    return {"status": "ok", "public_key": contact.public_key}

app/routers/fanout.py

@@ -0,0 +1,326 @@
+"""REST API for fanout config CRUD."""
+
+import logging
+import re
+import string
+
+from fastapi import APIRouter, HTTPException
+from pydantic import BaseModel, Field
+
+from app.config import settings as server_settings
+from app.repository.fanout import FanoutConfigRepository
+
+logger = logging.getLogger(__name__)
+router = APIRouter(prefix="/fanout", tags=["fanout"])
+
+_VALID_TYPES = {"mqtt_private", "mqtt_community", "bot", "webhook", "apprise"}
+
+_IATA_RE = re.compile(r"^[A-Z]{3}$")
+_DEFAULT_COMMUNITY_MQTT_TOPIC_TEMPLATE = "meshcore/{IATA}/{PUBLIC_KEY}/packets"
+_DEFAULT_COMMUNITY_MQTT_BROKER_HOST = "mqtt-us-v1.letsmesh.net"
+_DEFAULT_COMMUNITY_MQTT_BROKER_PORT = 443
+_DEFAULT_COMMUNITY_MQTT_TRANSPORT = "websockets"
+_DEFAULT_COMMUNITY_MQTT_AUTH_MODE = "token"
+_COMMUNITY_MQTT_TEMPLATE_FIELD_CANONICAL = {
+    "iata": "IATA",
+    "public_key": "PUBLIC_KEY",
+}
+_ALLOWED_COMMUNITY_MQTT_TRANSPORTS = {"tcp", "websockets"}
+_ALLOWED_COMMUNITY_MQTT_AUTH_MODES = {"token", "password", "none"}
+
+
+def _normalize_community_topic_template(topic_template: str) -> str:
+    """Normalize Community MQTT topic template placeholders to canonical uppercase form."""
+    template = topic_template.strip() or _DEFAULT_COMMUNITY_MQTT_TOPIC_TEMPLATE
+    parts: list[str] = []
+    try:
+        parsed = string.Formatter().parse(template)
+        for literal_text, field_name, format_spec, conversion in parsed:
+            parts.append(literal_text)
+            if field_name is None:
+                continue
+            normalized_field = _COMMUNITY_MQTT_TEMPLATE_FIELD_CANONICAL.get(field_name.lower())
+            if normalized_field is None:
+                raise HTTPException(
+                    status_code=400,
+                    detail=(
+                        f"topic_template may only use {{IATA}} and {{PUBLIC_KEY}}; got {field_name}"
+                    ),
+                )
+            replacement = ["{", normalized_field]
+            if conversion:
+                replacement.extend(["!", conversion])
+            if format_spec:
+                replacement.extend([":", format_spec])
+            replacement.append("}")
+            parts.append("".join(replacement))
+    except ValueError as exc:
+        raise HTTPException(status_code=400, detail=f"Invalid topic_template: {exc}") from None
+
+    return "".join(parts)
+
+
+class FanoutConfigCreate(BaseModel):
+    type: str = Field(description="Integration type: 'mqtt_private' or 'mqtt_community'")
+    name: str = Field(min_length=1, description="User-assigned label")
+    config: dict = Field(default_factory=dict, description="Type-specific config blob")
+    scope: dict = Field(default_factory=dict, description="Scope controls")
+    enabled: bool = Field(default=True, description="Whether enabled on creation")
+
+
+class FanoutConfigUpdate(BaseModel):
+    name: str | None = Field(default=None, min_length=1, description="Updated label")
+    config: dict | None = Field(default=None, description="Updated config blob")
+    scope: dict | None = Field(default=None, description="Updated scope controls")
+    enabled: bool | None = Field(default=None, description="Enable/disable toggle")
+
+
+def _validate_mqtt_private_config(config: dict) -> None:
+    """Validate mqtt_private config blob."""
+    if not config.get("broker_host"):
+        raise HTTPException(status_code=400, detail="broker_host is required for mqtt_private")
+    port = config.get("broker_port", 1883)
+    if not isinstance(port, int) or port < 1 or port > 65535:
+        raise HTTPException(status_code=400, detail="broker_port must be between 1 and 65535")
+
+
+def _validate_mqtt_community_config(config: dict) -> None:
+    """Validate mqtt_community config blob. Normalizes IATA to uppercase."""
+    broker_host = str(config.get("broker_host", _DEFAULT_COMMUNITY_MQTT_BROKER_HOST)).strip()
+    if not broker_host:
+        broker_host = _DEFAULT_COMMUNITY_MQTT_BROKER_HOST
+    config["broker_host"] = broker_host
+
+    port = config.get("broker_port", _DEFAULT_COMMUNITY_MQTT_BROKER_PORT)
+    if not isinstance(port, int) or port < 1 or port > 65535:
+        raise HTTPException(status_code=400, detail="broker_port must be between 1 and 65535")
+    config["broker_port"] = port
+
+    transport = str(config.get("transport", _DEFAULT_COMMUNITY_MQTT_TRANSPORT)).strip().lower()
+    if transport not in _ALLOWED_COMMUNITY_MQTT_TRANSPORTS:
+        raise HTTPException(
+            status_code=400,
+            detail="transport must be 'websockets' or 'tcp'",
+        )
+    config["transport"] = transport
+    config["use_tls"] = bool(config.get("use_tls", True))
+    config["tls_verify"] = bool(config.get("tls_verify", True))
+
+    auth_mode = str(config.get("auth_mode", _DEFAULT_COMMUNITY_MQTT_AUTH_MODE)).strip().lower()
+    if auth_mode not in _ALLOWED_COMMUNITY_MQTT_AUTH_MODES:
+        raise HTTPException(
+            status_code=400,
+            detail="auth_mode must be 'token', 'password', or 'none'",
+        )
+    config["auth_mode"] = auth_mode
+    username = str(config.get("username", "")).strip()
+    password = str(config.get("password", "")).strip()
+    if auth_mode == "password" and (not username or not password):
+        raise HTTPException(
+            status_code=400,
+            detail="username and password are required when auth_mode is 'password'",
+        )
+    config["username"] = username
+    config["password"] = password
+
+    token_audience = str(config.get("token_audience", "")).strip()
+    config["token_audience"] = token_audience
+
+    iata = config.get("iata", "").upper().strip()
+    if not iata or not _IATA_RE.fullmatch(iata):
+        raise HTTPException(
+            status_code=400,
+            detail="IATA code is required and must be exactly 3 uppercase alphabetic characters",
+        )
+    config["iata"] = iata
+
+    topic_template = str(
+        config.get("topic_template", _DEFAULT_COMMUNITY_MQTT_TOPIC_TEMPLATE)
+    ).strip()
+    if not topic_template:
+        topic_template = _DEFAULT_COMMUNITY_MQTT_TOPIC_TEMPLATE
+
+    config["topic_template"] = _normalize_community_topic_template(topic_template)
+
+
+def _validate_bot_config(config: dict) -> None:
+    """Validate bot config blob (syntax-check the code)."""
+    code = config.get("code", "")
+    if not code or not code.strip():
+        raise HTTPException(status_code=400, detail="Bot code cannot be empty")
+    try:
+        compile(code, "<bot_code>", "exec")
+    except SyntaxError as e:
+        raise HTTPException(
+            status_code=400,
+            detail=f"Bot code has syntax error at line {e.lineno}: {e.msg}",
+        ) from None
+
+
+def _validate_apprise_config(config: dict) -> None:
+    """Validate apprise config blob."""
+    urls = config.get("urls", "")
+    if not urls or not urls.strip():
+        raise HTTPException(status_code=400, detail="At least one Apprise URL is required")
+
+
+def _validate_webhook_config(config: dict) -> None:
+    """Validate webhook config blob."""
+    url = config.get("url", "")
+    if not url:
+        raise HTTPException(status_code=400, detail="url is required for webhook")
+    if not url.startswith(("http://", "https://")):
+        raise HTTPException(status_code=400, detail="url must start with http:// or https://")
+    method = config.get("method", "POST").upper()
+    if method not in ("POST", "PUT", "PATCH"):
+        raise HTTPException(status_code=400, detail="method must be POST, PUT, or PATCH")
+    headers = config.get("headers", {})
+    if not isinstance(headers, dict):
+        raise HTTPException(status_code=400, detail="headers must be a JSON object")
+
+
+def _enforce_scope(config_type: str, scope: dict) -> dict:
+    """Enforce type-specific scope constraints. Returns normalized scope."""
+    if config_type == "mqtt_community":
+        return {"messages": "none", "raw_packets": "all"}
+    if config_type == "bot":
+        return {"messages": "all", "raw_packets": "none"}
+    if config_type in ("webhook", "apprise"):
+        messages = scope.get("messages", "all")
+        if messages not in ("all", "none") and not isinstance(messages, dict):
+            raise HTTPException(
+                status_code=400,
+                detail="scope.messages must be 'all', 'none', or a filter object",
+            )
+        return {"messages": messages, "raw_packets": "none"}
+    # For mqtt_private, validate scope values
+    messages = scope.get("messages", "all")
+    if messages not in ("all", "none") and not isinstance(messages, dict):
+        raise HTTPException(
+            status_code=400,
+            detail="scope.messages must be 'all', 'none', or a filter object",
+        )
+    raw_packets = scope.get("raw_packets", "all")
+    if raw_packets not in ("all", "none"):
+        raise HTTPException(
+            status_code=400,
+            detail="scope.raw_packets must be 'all' or 'none'",
+        )
+    return {"messages": messages, "raw_packets": raw_packets}
+
+
+@router.get("")
+async def list_fanout_configs() -> list[dict]:
+    """List all fanout configs."""
+    return await FanoutConfigRepository.get_all()
+
+
+@router.post("")
+async def create_fanout_config(body: FanoutConfigCreate) -> dict:
+    """Create a new fanout config."""
+    if body.type not in _VALID_TYPES:
+        raise HTTPException(
+            status_code=400,
+            detail=f"Invalid type '{body.type}'. Must be one of: {', '.join(sorted(_VALID_TYPES))}",
+        )
+
+    if body.type == "bot" and server_settings.disable_bots:
+        raise HTTPException(status_code=403, detail="Bot system disabled by server configuration")
+
+    # Only validate config when creating as enabled — disabled configs
+    # are drafts the user hasn't finished configuring yet.
+    if body.enabled:
+        if body.type == "mqtt_private":
+            _validate_mqtt_private_config(body.config)
+        elif body.type == "mqtt_community":
+            _validate_mqtt_community_config(body.config)
+        elif body.type == "bot":
+            _validate_bot_config(body.config)
+        elif body.type == "webhook":
+            _validate_webhook_config(body.config)
+        elif body.type == "apprise":
+            _validate_apprise_config(body.config)
+
+    scope = _enforce_scope(body.type, body.scope)
+
+    cfg = await FanoutConfigRepository.create(
+        config_type=body.type,
+        name=body.name,
+        config=body.config,
+        scope=scope,
+        enabled=body.enabled,
+    )
+
+    # Start the module if enabled
+    if cfg["enabled"]:
+        from app.fanout.manager import fanout_manager
+
+        await fanout_manager.reload_config(cfg["id"])
+
+    logger.info("Created fanout config %s (type=%s, name=%s)", cfg["id"], body.type, body.name)
+    return cfg
+
+
+@router.patch("/{config_id}")
+async def update_fanout_config(config_id: str, body: FanoutConfigUpdate) -> dict:
+    """Update a fanout config. Triggers module reload."""
+    existing = await FanoutConfigRepository.get(config_id)
+    if existing is None:
+        raise HTTPException(status_code=404, detail="Fanout config not found")
+
+    if existing["type"] == "bot" and server_settings.disable_bots:
+        raise HTTPException(status_code=403, detail="Bot system disabled by server configuration")
+
+    kwargs = {}
+    if body.name is not None:
+        kwargs["name"] = body.name
+    if body.enabled is not None:
+        kwargs["enabled"] = body.enabled
+    if body.config is not None:
+        kwargs["config"] = body.config
+    if body.scope is not None:
+        kwargs["scope"] = _enforce_scope(existing["type"], body.scope)
+
+    # Validate config when the result will be enabled
+    will_be_enabled = body.enabled if body.enabled is not None else existing["enabled"]
+    if will_be_enabled:
+        config_to_validate = body.config if body.config is not None else existing["config"]
+        if existing["type"] == "mqtt_private":
+            _validate_mqtt_private_config(config_to_validate)
+        elif existing["type"] == "mqtt_community":
+            _validate_mqtt_community_config(config_to_validate)
+        elif existing["type"] == "bot":
+            _validate_bot_config(config_to_validate)
+        elif existing["type"] == "webhook":
+            _validate_webhook_config(config_to_validate)
+        elif existing["type"] == "apprise":
+            _validate_apprise_config(config_to_validate)
+
+    updated = await FanoutConfigRepository.update(config_id, **kwargs)
+    if updated is None:
+        raise HTTPException(status_code=404, detail="Fanout config not found")
+
+    # Reload the module to pick up changes
+    from app.fanout.manager import fanout_manager
+
+    await fanout_manager.reload_config(config_id)
+
+    logger.info("Updated fanout config %s", config_id)
+    return updated
+
+
+@router.delete("/{config_id}")
+async def delete_fanout_config(config_id: str) -> dict:
+    """Delete a fanout config."""
+    existing = await FanoutConfigRepository.get(config_id)
+    if existing is None:
+        raise HTTPException(status_code=404, detail="Fanout config not found")
+
+    # Stop the module first
+    from app.fanout.manager import fanout_manager
+
+    await fanout_manager.remove_config(config_id)
+    await FanoutConfigRepository.delete(config_id)
+
+    logger.info("Deleted fanout config %s", config_id)
+    return {"deleted": True}

app/routers/health.py

@@ -1,4 +1,5 @@
 import os
+from typing import Any
 
 from fastapi import APIRouter
 from pydantic import BaseModel
@@ -13,15 +14,16 @@ router = APIRouter(tags=["health"])
 class HealthResponse(BaseModel):
     status: str
     radio_connected: bool
-    serial_port: str | None
+    radio_initializing: bool = False
+    connection_info: str | None
     database_size_mb: float
     oldest_undecrypted_timestamp: int | None
+    fanout_statuses: dict[str, dict[str, str]] = {}
+    bots_disabled: bool = False
 
 
-@router.get("/health", response_model=HealthResponse)
-async def healthcheck() -> HealthResponse:
-    """Check if the API is running and if the radio is connected."""
-    # Get database file size in MB
+async def build_health_data(radio_connected: bool, connection_info: str | None) -> dict:
+    """Build the health status payload used by REST endpoint and WebSocket broadcasts."""
     db_size_mb = 0.0
     try:
         db_size_bytes = os.path.getsize(settings.database_path)
@@ -29,17 +31,45 @@ async def healthcheck() -> HealthResponse:
     except OSError:
         pass
 
-    # Get oldest undecrypted packet info (gracefully handle if DB not connected)
     oldest_ts = None
     try:
         oldest_ts = await RawPacketRepository.get_oldest_undecrypted()
     except RuntimeError:
         pass  # Database not connected
 
-    return HealthResponse(
-        status="ok" if radio_manager.is_connected else "degraded",
-        radio_connected=radio_manager.is_connected,
-        serial_port=radio_manager.port,
-        database_size_mb=db_size_mb,
-        oldest_undecrypted_timestamp=oldest_ts,
-    )
+    # Fanout module statuses
+    fanout_statuses: dict[str, Any] = {}
+    try:
+        from app.fanout.manager import fanout_manager
+
+        fanout_statuses = fanout_manager.get_statuses()
+    except Exception:
+        pass
+
+    setup_in_progress = getattr(radio_manager, "is_setup_in_progress", False)
+    if not isinstance(setup_in_progress, bool):
+        setup_in_progress = False
+
+    setup_complete = getattr(radio_manager, "is_setup_complete", radio_connected)
+    if not isinstance(setup_complete, bool):
+        setup_complete = radio_connected
+
+    radio_initializing = bool(radio_connected and (setup_in_progress or not setup_complete))
+
+    return {
+        "status": "ok" if radio_connected and not radio_initializing else "degraded",
+        "radio_connected": radio_connected,
+        "radio_initializing": radio_initializing,
+        "connection_info": connection_info,
+        "database_size_mb": db_size_mb,
+        "oldest_undecrypted_timestamp": oldest_ts,
+        "fanout_statuses": fanout_statuses,
+        "bots_disabled": settings.disable_bots,
+    }
+
+
+@router.get("/health", response_model=HealthResponse)
+async def healthcheck() -> HealthResponse:
+    """Check if the API is running and if the radio is connected."""
+    data = await build_health_data(radio_manager.is_connected, radio_manager.connection_info)
+    return HealthResponse(**data)

app/routers/messages.py

@@ -6,13 +6,42 @@ from meshcore import EventType
 
 from app.dependencies import require_connected
 from app.event_handlers import track_pending_ack
-from app.models import Message, SendChannelMessageRequest, SendDirectMessageRequest
-from app.repository import MessageRepository
+from app.models import (
+    Message,
+    MessagesAroundResponse,
+    SendChannelMessageRequest,
+    SendDirectMessageRequest,
+)
+from app.radio import radio_manager
+from app.repository import AmbiguousPublicKeyPrefixError, AppSettingsRepository, MessageRepository
+from app.websocket import broadcast_event
 
 logger = logging.getLogger(__name__)
 router = APIRouter(prefix="/messages", tags=["messages"])
 
 
+@router.get("/around/{message_id}", response_model=MessagesAroundResponse)
+async def get_messages_around(
+    message_id: int,
+    type: str | None = Query(default=None, description="Filter by type: PRIV or CHAN"),
+    conversation_key: str | None = Query(default=None, description="Filter by conversation key"),
+    context: int = Query(default=100, ge=1, le=500, description="Number of messages before/after"),
+) -> MessagesAroundResponse:
+    """Get messages around a specific message for jump-to-message navigation."""
+    settings = await AppSettingsRepository.get()
+    blocked_keys = settings.blocked_keys or None
+    blocked_names = settings.blocked_names or None
+    messages, has_older, has_newer = await MessageRepository.get_around(
+        message_id=message_id,
+        msg_type=type,
+        conversation_key=conversation_key,
+        context_size=context,
+        blocked_keys=blocked_keys,
+        blocked_names=blocked_names,
+    )
+    return MessagesAroundResponse(messages=messages, has_older=has_older, has_newer=has_newer)
+
+
 @router.get("", response_model=list[Message])
 async def list_messages(
     limit: int = Query(default=100, ge=1, le=1000),
@@ -21,75 +50,98 @@ async def list_messages(
     conversation_key: str | None = Query(
         default=None, description="Filter by conversation key (channel key or contact pubkey)"
     ),
+    before: int | None = Query(
+        default=None, description="Cursor: received_at of last seen message"
+    ),
+    before_id: int | None = Query(default=None, description="Cursor: id of last seen message"),
+    after: int | None = Query(
+        default=None, description="Forward cursor: received_at of last seen message"
+    ),
+    after_id: int | None = Query(
+        default=None, description="Forward cursor: id of last seen message"
+    ),
+    q: str | None = Query(default=None, description="Full-text search query"),
 ) -> list[Message]:
     """List messages from the database."""
+    settings = await AppSettingsRepository.get()
+    blocked_keys = settings.blocked_keys or None
+    blocked_names = settings.blocked_names or None
     return await MessageRepository.get_all(
         limit=limit,
         offset=offset,
         msg_type=type,
         conversation_key=conversation_key,
+        before=before,
+        before_id=before_id,
+        after=after,
+        after_id=after_id,
+        q=q,
+        blocked_keys=blocked_keys,
+        blocked_names=blocked_names,
     )
 
 
-@router.post("/bulk", response_model=dict[str, list[Message]])
-async def get_messages_bulk(
-    conversations: list[dict],
-    limit_per_conversation: int = Query(default=100, ge=1, le=1000),
-) -> dict[str, list[Message]]:
-    """Fetch messages for multiple conversations in one request.
-
-    Body should be a list of {type: 'PRIV'|'CHAN', conversation_key: string}.
-    Returns a dict mapping 'type:conversation_key' to list of messages.
-    """
-    return await MessageRepository.get_bulk(conversations, limit_per_conversation)
-
-
 @router.post("/direct", response_model=Message)
 async def send_direct_message(request: SendDirectMessageRequest) -> Message:
     """Send a direct message to a contact."""
-    mc = require_connected()
+    require_connected()
 
     # First check our database for the contact
     from app.repository import ContactRepository
 
-    db_contact = await ContactRepository.get_by_key_or_prefix(request.destination)
+    try:
+        db_contact = await ContactRepository.get_by_key_or_prefix(request.destination)
+    except AmbiguousPublicKeyPrefixError as err:
+        sample = ", ".join(key[:12] for key in err.matches[:2])
+        raise HTTPException(
+            status_code=409,
+            detail=(
+                f"Ambiguous destination key prefix '{err.prefix}'. "
+                f"Use a full 64-character public key. Matching contacts: {sample}"
+            ),
+        ) from err
     if not db_contact:
         raise HTTPException(
             status_code=404, detail=f"Contact not found in database: {request.destination}"
         )
 
-    # Check if contact is on radio, if not add it
-    contact = mc.get_contact_by_key_prefix(db_contact.public_key[:12])
-    if not contact:
-        logger.info("Adding contact %s to radio before sending", db_contact.public_key[:12])
-        contact_data = db_contact.to_radio_dict()
+    # Always add/update the contact on radio before sending.
+    # The library cache (get_contact_by_key_prefix) can be stale after radio reboot,
+    # so we can't rely on it to know if the firmware has the contact.
+    # add_contact is idempotent - updates if exists, adds if not.
+    contact_data = db_contact.to_radio_dict()
+    async with radio_manager.radio_operation("send_direct_message") as mc:
+        logger.debug("Ensuring contact %s is on radio before sending", db_contact.public_key[:12])
         add_result = await mc.commands.add_contact(contact_data)
         if add_result.type == EventType.ERROR:
             logger.warning("Failed to add contact to radio: %s", add_result.payload)
-            # Continue anyway - might still work
+            # Continue anyway - might still work if contact exists
 
-        # Get the contact from radio again
+        # Get the contact from the library cache (may have updated info like path)
         contact = mc.get_contact_by_key_prefix(db_contact.public_key[:12])
         if not contact:
-            # Use the contact_data we built as fallback
             contact = contact_data
 
-    logger.info("Sending direct message to %s", db_contact.public_key[:12])
+        logger.info("Sending direct message to %s", db_contact.public_key[:12])
 
-    result = await mc.commands.send_msg(
-        dst=contact,
-        msg=request.text,
-    )
+        # Capture timestamp BEFORE sending so we can pass the same value to both the radio
+        # and the database. This ensures consistency for deduplication.
+        now = int(time.time())
+
+        result = await mc.commands.send_msg(
+            dst=contact,
+            msg=request.text,
+            timestamp=now,
+        )
 
     if result.type == EventType.ERROR:
         raise HTTPException(status_code=500, detail=f"Failed to send message: {result.payload}")
 
     # Store outgoing message
-    now = int(time.time())
     message_id = await MessageRepository.create(
         msg_type="PRIV",
         text=request.text,
-        conversation_key=db_contact.public_key,
+        conversation_key=db_contact.public_key.lower(),
         sender_timestamp=now,
         received_at=now,
         outgoing=True,
@@ -101,7 +153,7 @@ async def send_direct_message(request: SendDirectMessageRequest) -> Message:
         )
 
     # Update last_contacted for the contact
-    await ContactRepository.update_last_contacted(db_contact.public_key, now)
+    await ContactRepository.update_last_contacted(db_contact.public_key.lower(), now)
 
     # Track the expected ACK for this message
     expected_ack = result.payload.get("expected_ack")
@@ -111,10 +163,10 @@ async def send_direct_message(request: SendDirectMessageRequest) -> Message:
         track_pending_ack(ack_code, message_id, suggested_timeout)
         logger.debug("Tracking ACK %s for message %d", ack_code, message_id)
 
-    return Message(
+    message = Message(
         id=message_id,
         type="PRIV",
-        conversation_key=db_contact.public_key,
+        conversation_key=db_contact.public_key.lower(),
         text=request.text,
         sender_timestamp=now,
         received_at=now,
@@ -122,6 +174,12 @@ async def send_direct_message(request: SendDirectMessageRequest) -> Message:
         acked=0,
     )
 
+    # Broadcast so all connected clients (not just sender) see the outgoing message immediately.
+    # Fanout modules (including bots) are triggered via broadcast_event's realtime dispatch.
+    broadcast_event("message", message.model_dump())
+
+    return message
+
 
 # Temporary radio slot used for sending channel messages
 TEMP_RADIO_SLOT = 0
@@ -130,7 +188,7 @@ TEMP_RADIO_SLOT = 0
 @router.post("/channel", response_model=Message)
 async def send_channel_message(request: SendChannelMessageRequest) -> Message:
     """Send a message to a channel."""
-    mc = require_connected()
+    require_connected()
 
     # Get channel info from our database
     from app.decoder import calculate_channel_hash
@@ -158,53 +216,96 @@ async def send_channel_message(request: SendChannelMessageRequest) -> Message:
         TEMP_RADIO_SLOT,
         expected_hash,
     )
-
-    # Load the channel to a temporary radio slot before sending
-    set_result = await mc.commands.set_channel(
-        channel_idx=TEMP_RADIO_SLOT,
-        channel_name=db_channel.name,
-        channel_secret=key_bytes,
-    )
-    if set_result.type == EventType.ERROR:
-        logger.warning(
-            "Failed to set channel on radio slot %d before sending: %s",
-            TEMP_RADIO_SLOT,
-            set_result.payload,
-        )
-        # Continue anyway - the channel might already be correctly configured
-
-    logger.info("Sending channel message to %s: %s", db_channel.name, request.text[:50])
-
-    result = await mc.commands.send_chan_msg(
-        chan=TEMP_RADIO_SLOT,
-        msg=request.text,
-    )
-
-    if result.type == EventType.ERROR:
-        raise HTTPException(status_code=500, detail=f"Failed to send message: {result.payload}")
-
-    # Store outgoing message with sender prefix (to match echo format)
-    # The radio includes "SenderName: " prefix when broadcasting, so we store it the same way
-    # to enable proper deduplication when the echo comes back
-    now = int(time.time())
     channel_key_upper = request.channel_key.upper()
-    radio_name = mc.self_info.get("name", "") if mc.self_info else ""
-    text_with_sender = f"{radio_name}: {request.text}" if radio_name else request.text
-    message_id = await MessageRepository.create(
-        msg_type="CHAN",
-        text=text_with_sender,
-        conversation_key=channel_key_upper,
-        sender_timestamp=now,
-        received_at=now,
-        outgoing=True,
-    )
-    if message_id is None:
-        raise HTTPException(
-            status_code=500,
-            detail="Failed to store outgoing message - unexpected duplicate",
+    message_id: int | None = None
+    now: int | None = None
+    radio_name: str = ""
+    text_with_sender: str = request.text
+
+    our_public_key: str | None = None
+
+    async with radio_manager.radio_operation("send_channel_message") as mc:
+        radio_name = mc.self_info.get("name", "") if mc.self_info else ""
+        our_public_key = (mc.self_info.get("public_key") or None) if mc.self_info else None
+        text_with_sender = f"{radio_name}: {request.text}" if radio_name else request.text
+        # Load the channel to a temporary radio slot before sending
+        set_result = await mc.commands.set_channel(
+            channel_idx=TEMP_RADIO_SLOT,
+            channel_name=db_channel.name,
+            channel_secret=key_bytes,
+        )
+        if set_result.type == EventType.ERROR:
+            logger.warning(
+                "Failed to set channel on radio slot %d before sending: %s",
+                TEMP_RADIO_SLOT,
+                set_result.payload,
+            )
+            raise HTTPException(
+                status_code=500,
+                detail="Failed to configure channel on radio before sending message",
+            )
+
+        logger.info("Sending channel message to %s: %s", db_channel.name, request.text[:50])
+
+        # Capture timestamp BEFORE sending so we can pass the same value to both the radio
+        # and the database. This ensures the echo's timestamp matches our stored message
+        # for proper deduplication.
+        now = int(time.time())
+        timestamp_bytes = now.to_bytes(4, "little")
+
+        result = await mc.commands.send_chan_msg(
+            chan=TEMP_RADIO_SLOT,
+            msg=request.text,
+            timestamp=timestamp_bytes,
         )
 
-    return Message(
+        if result.type == EventType.ERROR:
+            raise HTTPException(status_code=500, detail=f"Failed to send message: {result.payload}")
+
+        # Store outgoing immediately after send to avoid a race where
+        # our own echo lands before persistence.
+        message_id = await MessageRepository.create(
+            msg_type="CHAN",
+            text=text_with_sender,
+            conversation_key=channel_key_upper,
+            sender_timestamp=now,
+            received_at=now,
+            outgoing=True,
+            sender_name=radio_name or None,
+            sender_key=our_public_key,
+        )
+        if message_id is None:
+            raise HTTPException(
+                status_code=500,
+                detail="Failed to store outgoing message - unexpected duplicate",
+            )
+
+        # Broadcast immediately so all connected clients see the message promptly.
+        # This ensures the message exists in frontend state when echo-driven
+        # `message_acked` events arrive.
+        broadcast_event(
+            "message",
+            Message(
+                id=message_id,
+                type="CHAN",
+                conversation_key=channel_key_upper,
+                text=text_with_sender,
+                sender_timestamp=now,
+                received_at=now,
+                outgoing=True,
+                acked=0,
+                sender_name=radio_name or None,
+                sender_key=our_public_key,
+                channel_name=db_channel.name,
+            ).model_dump(),
+        )
+
+    if message_id is None or now is None:
+        raise HTTPException(status_code=500, detail="Failed to store outgoing message")
+
+    acked_count, paths = await MessageRepository.get_ack_and_paths(message_id)
+
+    message = Message(
         id=message_id,
         type="CHAN",
         conversation_key=channel_key_upper,
@@ -212,5 +313,150 @@ async def send_channel_message(request: SendChannelMessageRequest) -> Message:
         sender_timestamp=now,
         received_at=now,
         outgoing=True,
-        acked=0,
+        acked=acked_count,
+        paths=paths,
+        sender_name=radio_name or None,
+        sender_key=our_public_key,
+        channel_name=db_channel.name,
     )
+
+    return message
+
+
+RESEND_WINDOW_SECONDS = 30
+
+
+@router.post("/channel/{message_id}/resend")
+async def resend_channel_message(
+    message_id: int,
+    new_timestamp: bool = Query(default=False),
+) -> dict:
+    """Resend a channel message.
+
+    When new_timestamp=False (default): byte-perfect resend using the original timestamp.
+    Only allowed within 30 seconds of the original send.
+
+    When new_timestamp=True: resend with a fresh timestamp so repeaters treat it as a
+    new packet. Creates a new message row in the database. No time window restriction.
+    """
+    require_connected()
+
+    from app.repository import ChannelRepository
+
+    msg = await MessageRepository.get_by_id(message_id)
+    if not msg:
+        raise HTTPException(status_code=404, detail="Message not found")
+
+    if not msg.outgoing:
+        raise HTTPException(status_code=400, detail="Can only resend outgoing messages")
+
+    if msg.type != "CHAN":
+        raise HTTPException(status_code=400, detail="Can only resend channel messages")
+
+    if msg.sender_timestamp is None:
+        raise HTTPException(status_code=400, detail="Message has no timestamp")
+
+    # Byte-perfect resend enforces the 30s window; new-timestamp resend does not
+    if not new_timestamp:
+        elapsed = int(time.time()) - msg.sender_timestamp
+        if elapsed > RESEND_WINDOW_SECONDS:
+            raise HTTPException(status_code=400, detail="Resend window has expired (30 seconds)")
+
+    db_channel = await ChannelRepository.get_by_key(msg.conversation_key)
+    if not db_channel:
+        raise HTTPException(status_code=404, detail=f"Channel {msg.conversation_key} not found")
+
+    # Choose timestamp: original for byte-perfect, fresh for new-timestamp
+    if new_timestamp:
+        now = int(time.time())
+        timestamp_bytes = now.to_bytes(4, "little")
+    else:
+        timestamp_bytes = msg.sender_timestamp.to_bytes(4, "little")
+
+    try:
+        key_bytes = bytes.fromhex(msg.conversation_key)
+    except ValueError:
+        raise HTTPException(
+            status_code=400, detail=f"Invalid channel key format: {msg.conversation_key}"
+        ) from None
+
+    resend_public_key: str | None = None
+
+    async with radio_manager.radio_operation("resend_channel_message") as mc:
+        # Strip sender prefix: DB stores "RadioName: message" but radio needs "message"
+        radio_name = mc.self_info.get("name", "") if mc.self_info else ""
+        resend_public_key = (mc.self_info.get("public_key") or None) if mc.self_info else None
+        text_to_send = msg.text
+        if radio_name and text_to_send.startswith(f"{radio_name}: "):
+            text_to_send = text_to_send[len(f"{radio_name}: ") :]
+
+        set_result = await mc.commands.set_channel(
+            channel_idx=TEMP_RADIO_SLOT,
+            channel_name=db_channel.name,
+            channel_secret=key_bytes,
+        )
+        if set_result.type == EventType.ERROR:
+            raise HTTPException(
+                status_code=500,
+                detail="Failed to configure channel on radio before resending",
+            )
+
+        result = await mc.commands.send_chan_msg(
+            chan=TEMP_RADIO_SLOT,
+            msg=text_to_send,
+            timestamp=timestamp_bytes,
+        )
+        if result.type == EventType.ERROR:
+            raise HTTPException(
+                status_code=500, detail=f"Failed to resend message: {result.payload}"
+            )
+
+    # For new-timestamp resend, create a new message row and broadcast it
+    if new_timestamp:
+        new_msg_id = await MessageRepository.create(
+            msg_type="CHAN",
+            text=msg.text,
+            conversation_key=msg.conversation_key,
+            sender_timestamp=now,
+            received_at=now,
+            outgoing=True,
+            sender_name=radio_name or None,
+            sender_key=resend_public_key,
+        )
+        if new_msg_id is None:
+            # Timestamp-second collision (same text+channel within the same second).
+            # The radio already transmitted, so log and return the original ID rather
+            # than surfacing a 500 for a message that was successfully sent over the air.
+            logger.warning(
+                "Duplicate timestamp collision resending message %d — radio sent but DB row not created",
+                message_id,
+            )
+            return {"status": "ok", "message_id": message_id}
+
+        broadcast_event(
+            "message",
+            Message(
+                id=new_msg_id,
+                type="CHAN",
+                conversation_key=msg.conversation_key,
+                text=msg.text,
+                sender_timestamp=now,
+                received_at=now,
+                outgoing=True,
+                acked=0,
+                sender_name=radio_name or None,
+                sender_key=resend_public_key,
+                channel_name=db_channel.name,
+            ).model_dump(),
+        )
+
+        logger.info(
+            "Resent channel message %d as new message %d to %s",
+            message_id,
+            new_msg_id,
+            db_channel.name,
+        )
+        return {"status": "ok", "message_id": new_msg_id}
+
+    logger.info("Resent channel message %d to %s", message_id, db_channel.name)
+    return {"status": "ok", "message_id": message_id}

app/routers/packets.py

@@ -1,6 +1,8 @@
 import logging
 from hashlib import sha256
+from sqlite3 import OperationalError
 
+import aiosqlite
 from fastapi import APIRouter, BackgroundTasks
 from pydantic import BaseModel, Field
 
@@ -63,11 +65,14 @@ async def _run_historical_channel_decryption(
             msg_id = await create_message_from_decrypted(
                 packet_id=packet_id,
                 channel_key=channel_key_hex,
+                channel_name=display_name,
                 sender=result.sender,
                 message_text=result.message,
                 timestamp=result.timestamp,
                 received_at=packet_timestamp,
                 path=path_hex,
+                path_len=packet_info.path_length if packet_info else None,
+                realtime=False,  # Historical decryption should not trigger fanout
             )
 
             if msg_id is not None:
@@ -208,7 +213,7 @@ async def decrypt_historical_packets(
         # Try to find contact name for display
         from app.repository import ContactRepository
 
-        contact = await ContactRepository.get_by_key_or_prefix(contact_public_key_hex)
+        contact = await ContactRepository.get_by_key(contact_public_key_hex)
         display_name = contact.name if contact else None
 
         background_tasks.add_task(
@@ -233,8 +238,12 @@ async def decrypt_historical_packets(
 
 
 class MaintenanceRequest(BaseModel):
-    prune_undecrypted_days: int = Field(
-        ge=1, description="Delete undecrypted packets older than this many days"
+    prune_undecrypted_days: int | None = Field(
+        default=None, ge=1, description="Delete undecrypted packets older than this many days"
+    )
+    purge_linked_raw_packets: bool = Field(
+        default=False,
+        description="Delete raw packets already linked to a stored message",
     )
 
 
@@ -246,21 +255,44 @@ class MaintenanceResult(BaseModel):
 @router.post("/maintenance", response_model=MaintenanceResult)
 async def run_maintenance(request: MaintenanceRequest) -> MaintenanceResult:
     """
-    Clean up old undecrypted packets and reclaim disk space.
+    Run packet maintenance tasks and reclaim disk space.
 
-    - Deletes undecrypted packets older than the specified number of days
+    - Optionally deletes undecrypted packets older than the specified number of days
+    - Optionally deletes raw packets already linked to stored messages
     - Runs VACUUM to reclaim disk space
     """
-    logger.info(
-        "Running maintenance: pruning packets older than %d days", request.prune_undecrypted_days
-    )
+    deleted = 0
 
-    # Prune old undecrypted packets
-    deleted = await RawPacketRepository.prune_old_undecrypted(request.prune_undecrypted_days)
-    logger.info("Deleted %d old undecrypted packets", deleted)
+    if request.prune_undecrypted_days is not None:
+        logger.info(
+            "Running maintenance: pruning undecrypted packets older than %d days",
+            request.prune_undecrypted_days,
+        )
+        pruned_undecrypted = await RawPacketRepository.prune_old_undecrypted(
+            request.prune_undecrypted_days
+        )
+        deleted += pruned_undecrypted
+        logger.info("Deleted %d old undecrypted packets", pruned_undecrypted)
 
-    # Run VACUUM to reclaim space (must be outside transaction, use executescript)
-    await db.conn.executescript("VACUUM;")
-    logger.info("Database vacuumed")
+    if request.purge_linked_raw_packets:
+        logger.info("Running maintenance: purging raw packets linked to stored messages")
+        purged_linked = await RawPacketRepository.purge_linked_to_messages()
+        deleted += purged_linked
+        logger.info("Deleted %d linked raw packets", purged_linked)
 
-    return MaintenanceResult(packets_deleted=deleted, vacuumed=True)
+    # Run VACUUM to reclaim space on a dedicated connection.
+    # VACUUM requires exclusive access — if the main connection is actively
+    # writing (background sync, message processing, etc.) it fails with
+    # SQLITE_BUSY. This is expected; we just report vacuumed=False.
+    vacuumed = False
+    try:
+        async with aiosqlite.connect(db.db_path) as vacuum_conn:
+            await vacuum_conn.executescript("VACUUM;")
+        vacuumed = True
+        logger.info("Database vacuumed")
+    except OperationalError as e:
+        logger.warning("VACUUM skipped (database busy): %s", e)
+    except Exception as e:
+        logger.error("VACUUM failed unexpectedly: %s", e)
+
+    return MaintenanceResult(packets_deleted=deleted, vacuumed=vacuumed)

app/routers/radio.py

@@ -5,6 +5,8 @@ from meshcore import EventType
 from pydantic import BaseModel, Field
 
 from app.dependencies import require_connected
+from app.radio import radio_manager
+from app.radio_sync import send_advertisement as do_send_advertisement
 from app.radio_sync import sync_radio_time
 
 logger = logging.getLogger(__name__)
@@ -26,6 +28,12 @@ class RadioConfigResponse(BaseModel):
     tx_power: int = Field(description="Transmit power in dBm")
     max_tx_power: int = Field(description="Maximum transmit power in dBm")
     radio: RadioSettings
+    path_hash_mode: int = Field(
+        default=0, description="Path hash mode (0=1-byte, 1=2-byte, 2=3-byte)"
+    )
+    path_hash_mode_supported: bool = Field(
+        default=False, description="Whether firmware supports path hash mode setting"
+    )
 
 
 class RadioConfigUpdate(BaseModel):
@@ -34,6 +42,12 @@ class RadioConfigUpdate(BaseModel):
     lon: float | None = None
     tx_power: int | None = Field(default=None, description="Transmit power in dBm")
     radio: RadioSettings | None = None
+    path_hash_mode: int | None = Field(
+        default=None,
+        ge=0,
+        le=2,
+        description="Path hash mode (0=1-byte, 1=2-byte, 2=3-byte)",
+    )
 
 
 class PrivateKeyUpdate(BaseModel):
@@ -62,46 +76,68 @@ async def get_radio_config() -> RadioConfigResponse:
             sf=info.get("radio_sf", 0),
             cr=info.get("radio_cr", 0),
         ),
+        path_hash_mode=radio_manager.path_hash_mode,
+        path_hash_mode_supported=radio_manager.path_hash_mode_supported,
     )
 
 
 @router.patch("/config", response_model=RadioConfigResponse)
 async def update_radio_config(update: RadioConfigUpdate) -> RadioConfigResponse:
     """Update radio configuration. Only provided fields will be updated."""
-    mc = require_connected()
+    require_connected()
 
-    if update.name is not None:
-        logger.info("Setting radio name to %s", update.name)
-        await mc.commands.set_name(update.name)
+    async with radio_manager.radio_operation("update_radio_config") as mc:
+        if update.name is not None:
+            logger.info("Setting radio name to %s", update.name)
+            await mc.commands.set_name(update.name)
 
-    if update.lat is not None or update.lon is not None:
-        current_info = mc.self_info
-        lat = update.lat if update.lat is not None else current_info.get("adv_lat", 0.0)
-        lon = update.lon if update.lon is not None else current_info.get("adv_lon", 0.0)
-        logger.info("Setting radio coordinates to %f, %f", lat, lon)
-        await mc.commands.set_coords(lat=lat, lon=lon)
+        if update.lat is not None or update.lon is not None:
+            current_info = mc.self_info
+            lat = update.lat if update.lat is not None else current_info.get("adv_lat", 0.0)
+            lon = update.lon if update.lon is not None else current_info.get("adv_lon", 0.0)
+            logger.info("Setting radio coordinates to %f, %f", lat, lon)
+            await mc.commands.set_coords(lat=lat, lon=lon)
 
-    if update.tx_power is not None:
-        logger.info("Setting TX power to %d dBm", update.tx_power)
-        await mc.commands.set_tx_power(val=update.tx_power)
+        if update.tx_power is not None:
+            logger.info("Setting TX power to %d dBm", update.tx_power)
+            await mc.commands.set_tx_power(val=update.tx_power)
 
-    if update.radio is not None:
-        logger.info(
-            "Setting radio params: freq=%f MHz, bw=%f kHz, sf=%d, cr=%d",
-            update.radio.freq,
-            update.radio.bw,
-            update.radio.sf,
-            update.radio.cr,
-        )
-        await mc.commands.set_radio(
-            freq=update.radio.freq,
-            bw=update.radio.bw,
-            sf=update.radio.sf,
-            cr=update.radio.cr,
-        )
+        if update.radio is not None:
+            logger.info(
+                "Setting radio params: freq=%f MHz, bw=%f kHz, sf=%d, cr=%d",
+                update.radio.freq,
+                update.radio.bw,
+                update.radio.sf,
+                update.radio.cr,
+            )
+            await mc.commands.set_radio(
+                freq=update.radio.freq,
+                bw=update.radio.bw,
+                sf=update.radio.sf,
+                cr=update.radio.cr,
+            )
 
-    # Sync time with system clock
-    await sync_radio_time()
+        if update.path_hash_mode is not None:
+            if not radio_manager.path_hash_mode_supported:
+                raise HTTPException(
+                    status_code=400, detail="Firmware does not support path hash mode setting"
+                )
+            logger.info("Setting path hash mode to %d", update.path_hash_mode)
+            result = await mc.commands.set_path_hash_mode(update.path_hash_mode)
+            if result is not None and result.type == EventType.ERROR:
+                raise HTTPException(
+                    status_code=500,
+                    detail=f"Failed to set path hash mode: {result.payload}",
+                )
+            radio_manager.path_hash_mode = update.path_hash_mode
+
+        # Sync time with system clock
+        await sync_radio_time(mc)
+
+        # Re-fetch self_info so the response reflects the changes we just made.
+        # Commands like set_name() write to flash but don't update the cached
+        # self_info — send_appstart() triggers a fresh SELF_INFO from the radio.
+        await mc.commands.send_appstart()
 
     return await get_radio_config()
 
@@ -109,7 +145,7 @@ async def update_radio_config(update: RadioConfigUpdate) -> RadioConfigResponse:
 @router.put("/private-key")
 async def set_private_key(update: PrivateKeyUpdate) -> dict:
     """Set the radio's private key. This is write-only."""
-    mc = require_connected()
+    require_connected()
 
     try:
         key_bytes = bytes.fromhex(update.private_key)
@@ -117,30 +153,83 @@ async def set_private_key(update: PrivateKeyUpdate) -> dict:
         raise HTTPException(status_code=400, detail="Invalid hex string for private key") from None
 
     logger.info("Importing private key")
-    result = await mc.commands.import_private_key(key_bytes)
+    async with radio_manager.radio_operation("import_private_key") as mc:
+        result = await mc.commands.import_private_key(key_bytes)
 
-    if result.type == EventType.ERROR:
+        if result.type == EventType.ERROR:
+            raise HTTPException(
+                status_code=500, detail=f"Failed to import private key: {result.payload}"
+            )
+
+        # Re-export from radio so the server-side keystore uses the new key
+        # for DM decryption immediately, rather than waiting for reconnect.
+        from app.keystore import export_and_store_private_key
+
+        keystore_refreshed = await export_and_store_private_key(mc)
+        if not keystore_refreshed:
+            logger.warning("Keystore refresh failed after import, retrying once")
+            keystore_refreshed = await export_and_store_private_key(mc)
+
+    if not keystore_refreshed:
         raise HTTPException(
-            status_code=500, detail=f"Failed to import private key: {result.payload}"
+            status_code=500,
+            detail=(
+                "Private key imported on radio, but server-side keystore "
+                "refresh failed. Reconnect to apply the new key for DM decryption."
+            ),
         )
 
     return {"status": "ok"}
 
 
 @router.post("/advertise")
-async def send_advertisement(flood: bool = True) -> dict:
-    """Send a radio advertisement to announce presence on the mesh."""
-    mc = require_connected()
+async def send_advertisement() -> dict:
+    """Send a flood advertisement to announce presence on the mesh.
 
-    logger.info("Sending advertisement (flood=%s)", flood)
-    result = await mc.commands.send_advert(flood=flood)
+    Manual advertisement requests always send immediately, updating the
+    last_advert_time which affects when the next periodic/startup advert
+    can occur.
 
-    if result.type == EventType.ERROR:
+    Returns:
+        status: "ok" if sent successfully
+    """
+    require_connected()
+
+    logger.info("Sending flood advertisement")
+    async with radio_manager.radio_operation("manual_advertisement") as mc:
+        success = await do_send_advertisement(mc, force=True)
+
+    if not success:
+        raise HTTPException(status_code=500, detail="Failed to send advertisement")
+
+    return {"status": "ok"}
+
+
+async def _attempt_reconnect() -> dict:
+    """Shared reconnection logic for reboot and reconnect endpoints."""
+    if radio_manager.is_reconnecting:
+        return {
+            "status": "pending",
+            "message": "Reconnection already in progress",
+            "connected": False,
+        }
+
+    success = await radio_manager.reconnect()
+    if not success:
         raise HTTPException(
-            status_code=500, detail=f"Failed to send advertisement: {result.payload}"
+            status_code=503, detail="Failed to reconnect. Check radio connection and power."
         )
 
-    return {"status": "ok", "flood": flood}
+    try:
+        await radio_manager.post_connect_setup()
+    except Exception as e:
+        logger.exception("Post-connect setup failed after reconnect")
+        raise HTTPException(
+            status_code=503,
+            detail=f"Radio connected but setup failed: {e}",
+        ) from e
+
+    return {"status": "ok", "message": "Reconnected successfully", "connected": True}
 
 
 @router.post("/reboot")
@@ -150,42 +239,17 @@ async def reboot_radio() -> dict:
     If connected: sends reboot command, connection will temporarily drop and auto-reconnect.
     If not connected: attempts to reconnect (same as /reconnect endpoint).
     """
-    from app.radio import radio_manager
-
-    # If connected, send reboot command
-    if radio_manager.is_connected and radio_manager.meshcore:
+    if radio_manager.is_connected:
         logger.info("Rebooting radio")
-        await radio_manager.meshcore.commands.reboot()
+        async with radio_manager.radio_operation("reboot_radio") as mc:
+            await mc.commands.reboot()
         return {
             "status": "ok",
             "message": "Reboot command sent. Radio will reconnect automatically.",
         }
 
-    # Not connected - attempt to reconnect
-    if radio_manager.is_reconnecting:
-        return {
-            "status": "pending",
-            "message": "Reconnection already in progress",
-            "connected": False,
-        }
-
     logger.info("Radio not connected, attempting reconnect")
-    success = await radio_manager.reconnect()
-
-    if success:
-        # Re-register event handlers after successful reconnect
-        from app.event_handlers import register_event_handlers
-
-        if radio_manager.meshcore:
-            register_event_handlers(radio_manager.meshcore)
-            await radio_manager.meshcore.start_auto_message_fetching()
-            logger.info("Event handlers re-registered and auto message fetching started")
-
-        return {"status": "ok", "message": "Reconnected successfully", "connected": True}
-    else:
-        raise HTTPException(
-            status_code=503, detail="Failed to reconnect. Check radio connection and power."
-        )
+    return await _attempt_reconnect()
 
 
 @router.post("/reconnect")
@@ -196,33 +260,20 @@ async def reconnect_radio() -> dict:
     if no specific port is configured. Useful when the radio has been disconnected
     or power-cycled.
     """
-    from app.radio import radio_manager
-
     if radio_manager.is_connected:
-        return {"status": "ok", "message": "Already connected", "connected": True}
+        if radio_manager.is_setup_complete:
+            return {"status": "ok", "message": "Already connected", "connected": True}
 
-    if radio_manager.is_reconnecting:
-        return {
-            "status": "pending",
-            "message": "Reconnection already in progress",
-            "connected": False,
-        }
+        logger.info("Radio connected but setup incomplete, retrying setup")
+        try:
+            await radio_manager.post_connect_setup()
+            return {"status": "ok", "message": "Setup completed", "connected": True}
+        except Exception as e:
+            logger.exception("Post-connect setup failed")
+            raise HTTPException(
+                status_code=503,
+                detail=f"Radio connected but setup failed: {e}",
+            ) from e
 
     logger.info("Manual reconnect requested")
-    success = await radio_manager.reconnect()
-
-    if success:
-        # Re-register event handlers after successful reconnect
-        from app.event_handlers import register_event_handlers
-
-        if radio_manager.meshcore:
-            register_event_handlers(radio_manager.meshcore)
-            # Restart auto message fetching
-            await radio_manager.meshcore.start_auto_message_fetching()
-            logger.info("Event handlers re-registered and auto message fetching started")
-
-        return {"status": "ok", "message": "Reconnected successfully", "connected": True}
-    else:
-        raise HTTPException(
-            status_code=503, detail="Failed to reconnect. Check radio connection and power."
-        )
+    return await _attempt_reconnect()

app/routers/read_state.py

@@ -5,25 +5,52 @@ import time
 
 from fastapi import APIRouter
 
-from app.database import db
+from app.models import UnreadCounts
+from app.radio import radio_manager
+from app.repository import (
+    AppSettingsRepository,
+    ChannelRepository,
+    ContactRepository,
+    MessageRepository,
+)
 
 logger = logging.getLogger(__name__)
 router = APIRouter(prefix="/read-state", tags=["read-state"])
 
 
+@router.get("/unreads", response_model=UnreadCounts)
+async def get_unreads() -> UnreadCounts:
+    """Get unread counts, mention flags, and last message times for all conversations.
+
+    Computes unread counts server-side using last_read_at timestamps on
+    channels and contacts, avoiding the need to fetch bulk messages.
+    The radio's own name is sourced directly from the connected radio
+    for @mention detection.
+    """
+    name: str | None = None
+    mc = radio_manager.meshcore
+    if mc and mc.self_info:
+        name = mc.self_info.get("name") or None
+    settings = await AppSettingsRepository.get()
+    blocked_keys = settings.blocked_keys or None
+    blocked_names = settings.blocked_names or None
+    data = await MessageRepository.get_unread_counts(
+        name, blocked_keys=blocked_keys, blocked_names=blocked_names
+    )
+    return UnreadCounts(**data)
+
+
 @router.post("/mark-all-read")
 async def mark_all_read() -> dict:
     """Mark all contacts and channels as read.
 
     Updates last_read_at to current timestamp for all contacts and channels
-    in a single database transaction.
+    using two repository updates (same timestamp value across both tables).
     """
     now = int(time.time())
 
-    # Update all contacts and channels in one transaction
-    await db.conn.execute("UPDATE contacts SET last_read_at = ?", (now,))
-    await db.conn.execute("UPDATE channels SET last_read_at = ?", (now,))
-    await db.conn.commit()
+    await ContactRepository.mark_all_read(now)
+    await ChannelRepository.mark_all_read(now)
 
     logger.info("Marked all contacts and channels as read at %d", now)
     return {"status": "ok", "timestamp": now}

app/routers/repeaters.py

@@ -0,0 +1,510 @@
+import asyncio
+import logging
+import time
+from typing import TYPE_CHECKING
+
+from fastapi import APIRouter, HTTPException
+from meshcore import EventType
+
+from app.dependencies import require_connected
+from app.models import (
+    CONTACT_TYPE_REPEATER,
+    AclEntry,
+    CommandRequest,
+    CommandResponse,
+    Contact,
+    LppSensor,
+    NeighborInfo,
+    RepeaterAclResponse,
+    RepeaterAdvertIntervalsResponse,
+    RepeaterLoginRequest,
+    RepeaterLoginResponse,
+    RepeaterLppTelemetryResponse,
+    RepeaterNeighborsResponse,
+    RepeaterOwnerInfoResponse,
+    RepeaterRadioSettingsResponse,
+    RepeaterStatusResponse,
+)
+from app.radio import radio_manager
+from app.repository import ContactRepository
+from app.routers.contacts import _ensure_on_radio, _resolve_contact_or_404
+
+if TYPE_CHECKING:
+    from meshcore.events import Event
+
+logger = logging.getLogger(__name__)
+
+# ACL permission level names
+ACL_PERMISSION_NAMES = {
+    0: "Guest",
+    1: "Read-only",
+    2: "Read-write",
+    3: "Admin",
+}
+router = APIRouter(prefix="/contacts", tags=["repeaters"])
+
+# Delay between repeater radio operations to allow key exchange and path establishment
+REPEATER_OP_DELAY_SECONDS = 2.0
+
+
+def _monotonic() -> float:
+    """Wrapper around time.monotonic() for testability.
+
+    Patching time.monotonic directly breaks the asyncio event loop which also
+    uses it. This indirection allows tests to control the clock safely.
+    """
+    return time.monotonic()
+
+
+def _extract_response_text(event) -> str:
+    """Extract text from a CLI response event, stripping the firmware '> ' prefix."""
+    text = event.payload.get("text", str(event.payload))
+    if text.startswith("> "):
+        text = text[2:]
+    return text
+
+
+async def _fetch_repeater_response(
+    mc,
+    target_pubkey_prefix: str,
+    timeout: float = 20.0,
+) -> "Event | None":
+    """Fetch a CLI response from a specific repeater via a validated get_msg() loop.
+
+    Calls get_msg() repeatedly until a matching CLI response (txt_type=1) from the
+    target repeater arrives or the wall-clock deadline expires. Unrelated messages
+    are safe to skip — meshcore's event dispatcher already delivers them to the
+    normal subscription handlers (on_contact_message, etc.) when get_msg() returns.
+
+    Args:
+        mc: MeshCore instance
+        target_pubkey_prefix: 12-char hex prefix of the repeater's public key
+        timeout: Wall-clock seconds before giving up
+
+    Returns:
+        The matching Event, or None if no response arrived before the deadline.
+    """
+    deadline = _monotonic() + timeout
+
+    while _monotonic() < deadline:
+        try:
+            result = await mc.commands.get_msg(timeout=2.0)
+        except asyncio.TimeoutError:
+            continue
+        except Exception as e:
+            logger.debug("get_msg() exception: %s", e)
+            await asyncio.sleep(1.0)
+            continue
+
+        if result.type == EventType.NO_MORE_MSGS:
+            # No messages queued yet — wait and retry
+            await asyncio.sleep(1.0)
+            continue
+
+        if result.type == EventType.ERROR:
+            logger.debug("get_msg() error: %s", result.payload)
+            await asyncio.sleep(1.0)
+            continue
+
+        if result.type == EventType.CONTACT_MSG_RECV:
+            msg_prefix = result.payload.get("pubkey_prefix", "")
+            txt_type = result.payload.get("txt_type", 0)
+            if msg_prefix == target_pubkey_prefix and txt_type == 1:
+                return result
+            # Not our target — already dispatched to subscribers by meshcore,
+            # so just continue draining the queue.
+            logger.debug(
+                "Skipping non-target message (from=%s, txt_type=%d) while waiting for %s",
+                msg_prefix,
+                txt_type,
+                target_pubkey_prefix,
+            )
+            continue
+
+        if result.type == EventType.CHANNEL_MSG_RECV:
+            # Already dispatched to subscribers by meshcore; skip.
+            logger.debug(
+                "Skipping channel message (channel_idx=%s) during repeater fetch",
+                result.payload.get("channel_idx"),
+            )
+            continue
+
+        logger.debug("Unexpected event type %s during repeater fetch, skipping", result.type)
+
+    logger.warning("No CLI response from repeater %s within %.1fs", target_pubkey_prefix, timeout)
+    return None
+
+
+async def prepare_repeater_connection(mc, contact: Contact, password: str) -> None:
+    """Prepare connection to a repeater by adding to radio and logging in.
+
+    Args:
+        mc: MeshCore instance
+        contact: The repeater contact
+        password: Password for login (empty string for no password)
+
+    Raises:
+        HTTPException: If login fails
+    """
+    # Add contact to radio with path from DB (non-fatal — contact may already be loaded)
+    logger.info("Adding repeater %s to radio", contact.public_key[:12])
+    await _ensure_on_radio(mc, contact)
+
+    # Send login with password
+    logger.info("Sending login to repeater %s", contact.public_key[:12])
+    login_result = await mc.commands.send_login(contact.public_key, password)
+
+    if login_result.type == EventType.ERROR:
+        raise HTTPException(status_code=401, detail=f"Login failed: {login_result.payload}")
+
+    # Wait for key exchange to complete before sending requests
+    logger.debug("Waiting %.1fs for key exchange to complete", REPEATER_OP_DELAY_SECONDS)
+    await asyncio.sleep(REPEATER_OP_DELAY_SECONDS)
+
+
+def _require_repeater(contact: Contact) -> None:
+    """Raise 400 if contact is not a repeater."""
+    if contact.type != CONTACT_TYPE_REPEATER:
+        raise HTTPException(
+            status_code=400,
+            detail=f"Contact is not a repeater (type={contact.type}, expected {CONTACT_TYPE_REPEATER})",
+        )
+
+
+# ---------------------------------------------------------------------------
+# Granular repeater endpoints — one attempt, no server-side retries.
+# Frontend manages retry logic for better UX control.
+# ---------------------------------------------------------------------------
+
+
+@router.post("/{public_key}/repeater/login", response_model=RepeaterLoginResponse)
+async def repeater_login(public_key: str, request: RepeaterLoginRequest) -> RepeaterLoginResponse:
+    """Log in to a repeater. Adds contact to radio, sends login, waits for key exchange."""
+    require_connected()
+    contact = await _resolve_contact_or_404(public_key)
+    _require_repeater(contact)
+
+    async with radio_manager.radio_operation(
+        "repeater_login",
+        pause_polling=True,
+        suspend_auto_fetch=True,
+    ) as mc:
+        await prepare_repeater_connection(mc, contact, request.password)
+
+    return RepeaterLoginResponse(status="ok")
+
+
+@router.post("/{public_key}/repeater/status", response_model=RepeaterStatusResponse)
+async def repeater_status(public_key: str) -> RepeaterStatusResponse:
+    """Fetch status telemetry from a repeater (single attempt, 10s timeout)."""
+    require_connected()
+    contact = await _resolve_contact_or_404(public_key)
+    _require_repeater(contact)
+
+    async with radio_manager.radio_operation(
+        "repeater_status", pause_polling=True, suspend_auto_fetch=True
+    ) as mc:
+        # Ensure contact is on radio for routing
+        await _ensure_on_radio(mc, contact)
+
+        status = await mc.commands.req_status_sync(contact.public_key, timeout=10, min_timeout=5)
+
+    if status is None:
+        raise HTTPException(status_code=504, detail="No status response from repeater")
+
+    return RepeaterStatusResponse(
+        battery_volts=status.get("bat", 0) / 1000.0,
+        tx_queue_len=status.get("tx_queue_len", 0),
+        noise_floor_dbm=status.get("noise_floor", 0),
+        last_rssi_dbm=status.get("last_rssi", 0),
+        last_snr_db=status.get("last_snr", 0.0),
+        packets_received=status.get("nb_recv", 0),
+        packets_sent=status.get("nb_sent", 0),
+        airtime_seconds=status.get("airtime", 0),
+        rx_airtime_seconds=status.get("rx_airtime", 0),
+        uptime_seconds=status.get("uptime", 0),
+        sent_flood=status.get("sent_flood", 0),
+        sent_direct=status.get("sent_direct", 0),
+        recv_flood=status.get("recv_flood", 0),
+        recv_direct=status.get("recv_direct", 0),
+        flood_dups=status.get("flood_dups", 0),
+        direct_dups=status.get("direct_dups", 0),
+        full_events=status.get("full_evts", 0),
+    )
+
+
+@router.post("/{public_key}/repeater/lpp-telemetry", response_model=RepeaterLppTelemetryResponse)
+async def repeater_lpp_telemetry(public_key: str) -> RepeaterLppTelemetryResponse:
+    """Fetch CayenneLPP sensor telemetry from a repeater (single attempt, 10s timeout)."""
+    require_connected()
+    contact = await _resolve_contact_or_404(public_key)
+    _require_repeater(contact)
+
+    async with radio_manager.radio_operation(
+        "repeater_lpp_telemetry", pause_polling=True, suspend_auto_fetch=True
+    ) as mc:
+        await _ensure_on_radio(mc, contact)
+
+        telemetry = await mc.commands.req_telemetry_sync(
+            contact.public_key, timeout=10, min_timeout=5
+        )
+
+    if telemetry is None:
+        raise HTTPException(status_code=504, detail="No telemetry response from repeater")
+
+    sensors: list[LppSensor] = []
+    for entry in telemetry:
+        channel = entry.get("channel", 0)
+        type_name = str(entry.get("type", "unknown"))
+        value = entry.get("value", 0)
+        sensors.append(LppSensor(channel=channel, type_name=type_name, value=value))
+
+    return RepeaterLppTelemetryResponse(sensors=sensors)
+
+
+@router.post("/{public_key}/repeater/neighbors", response_model=RepeaterNeighborsResponse)
+async def repeater_neighbors(public_key: str) -> RepeaterNeighborsResponse:
+    """Fetch neighbors from a repeater (single attempt, 10s timeout)."""
+    require_connected()
+    contact = await _resolve_contact_or_404(public_key)
+    _require_repeater(contact)
+
+    async with radio_manager.radio_operation(
+        "repeater_neighbors", pause_polling=True, suspend_auto_fetch=True
+    ) as mc:
+        # Ensure contact is on radio for routing
+        await _ensure_on_radio(mc, contact)
+
+        neighbors_data = await mc.commands.fetch_all_neighbours(
+            contact.public_key, timeout=10, min_timeout=5
+        )
+
+    neighbors: list[NeighborInfo] = []
+    if neighbors_data and "neighbours" in neighbors_data:
+        for n in neighbors_data["neighbours"]:
+            pubkey_prefix = n.get("pubkey", "")
+            resolved_contact = await ContactRepository.get_by_key_prefix(pubkey_prefix)
+            neighbors.append(
+                NeighborInfo(
+                    pubkey_prefix=pubkey_prefix,
+                    name=resolved_contact.name if resolved_contact else None,
+                    snr=n.get("snr", 0.0),
+                    last_heard_seconds=n.get("secs_ago", 0),
+                )
+            )
+
+    return RepeaterNeighborsResponse(neighbors=neighbors)
+
+
+@router.post("/{public_key}/repeater/acl", response_model=RepeaterAclResponse)
+async def repeater_acl(public_key: str) -> RepeaterAclResponse:
+    """Fetch ACL from a repeater (single attempt, 10s timeout)."""
+    require_connected()
+    contact = await _resolve_contact_or_404(public_key)
+    _require_repeater(contact)
+
+    async with radio_manager.radio_operation(
+        "repeater_acl", pause_polling=True, suspend_auto_fetch=True
+    ) as mc:
+        # Ensure contact is on radio for routing
+        await _ensure_on_radio(mc, contact)
+
+        acl_data = await mc.commands.req_acl_sync(contact.public_key, timeout=10, min_timeout=5)
+
+    acl_entries: list[AclEntry] = []
+    if acl_data and isinstance(acl_data, list):
+        for entry in acl_data:
+            pubkey_prefix = entry.get("key", "")
+            perm = entry.get("perm", 0)
+            resolved_contact = await ContactRepository.get_by_key_prefix(pubkey_prefix)
+            acl_entries.append(
+                AclEntry(
+                    pubkey_prefix=pubkey_prefix,
+                    name=resolved_contact.name if resolved_contact else None,
+                    permission=perm,
+                    permission_name=ACL_PERMISSION_NAMES.get(perm, f"Unknown({perm})"),
+                )
+            )
+
+    return RepeaterAclResponse(acl=acl_entries)
+
+
+async def _batch_cli_fetch(
+    contact: Contact,
+    operation_name: str,
+    commands: list[tuple[str, str]],
+) -> dict[str, str | None]:
+    """Send a batch of CLI commands to a repeater and collect responses.
+
+    Opens a radio operation with polling paused and auto-fetch suspended (since
+    we call get_msg() directly via _fetch_repeater_response), adds the contact
+    to the radio for routing, then sends each command sequentially with a 1-second
+    gap between them.
+
+    Returns a dict mapping field names to response strings (or None on timeout).
+    """
+    results: dict[str, str | None] = {field: None for _, field in commands}
+
+    async with radio_manager.radio_operation(
+        operation_name,
+        pause_polling=True,
+        suspend_auto_fetch=True,
+    ) as mc:
+        await _ensure_on_radio(mc, contact)
+        await asyncio.sleep(1.0)
+
+        for i, (cmd, field) in enumerate(commands):
+            if i > 0:
+                await asyncio.sleep(1.0)
+
+            send_result = await mc.commands.send_cmd(contact.public_key, cmd)
+            if send_result.type == EventType.ERROR:
+                logger.debug("Command '%s' send error: %s", cmd, send_result.payload)
+                continue
+
+            response_event = await _fetch_repeater_response(
+                mc, contact.public_key[:12], timeout=10.0
+            )
+            if response_event is not None:
+                results[field] = _extract_response_text(response_event)
+            else:
+                logger.warning("No response for command '%s' (%s)", cmd, field)
+
+    return results
+
+
+@router.post("/{public_key}/repeater/radio-settings", response_model=RepeaterRadioSettingsResponse)
+async def repeater_radio_settings(public_key: str) -> RepeaterRadioSettingsResponse:
+    """Fetch radio settings from a repeater via batch CLI commands."""
+    require_connected()
+    contact = await _resolve_contact_or_404(public_key)
+    _require_repeater(contact)
+
+    results = await _batch_cli_fetch(
+        contact,
+        "repeater_radio_settings",
+        [
+            ("ver", "firmware_version"),
+            ("get radio", "radio"),
+            ("get tx", "tx_power"),
+            ("get af", "airtime_factor"),
+            ("get repeat", "repeat_enabled"),
+            ("get flood.max", "flood_max"),
+            ("get name", "name"),
+            ("get lat", "lat"),
+            ("get lon", "lon"),
+            ("clock", "clock_utc"),
+        ],
+    )
+    return RepeaterRadioSettingsResponse(**results)
+
+
+@router.post(
+    "/{public_key}/repeater/advert-intervals", response_model=RepeaterAdvertIntervalsResponse
+)
+async def repeater_advert_intervals(public_key: str) -> RepeaterAdvertIntervalsResponse:
+    """Fetch advertisement intervals from a repeater via CLI commands."""
+    require_connected()
+    contact = await _resolve_contact_or_404(public_key)
+    _require_repeater(contact)
+
+    results = await _batch_cli_fetch(
+        contact,
+        "repeater_advert_intervals",
+        [
+            ("get advert.interval", "advert_interval"),
+            ("get flood.advert.interval", "flood_advert_interval"),
+        ],
+    )
+    return RepeaterAdvertIntervalsResponse(**results)
+
+
+@router.post("/{public_key}/repeater/owner-info", response_model=RepeaterOwnerInfoResponse)
+async def repeater_owner_info(public_key: str) -> RepeaterOwnerInfoResponse:
+    """Fetch owner info and guest password from a repeater via CLI commands."""
+    require_connected()
+    contact = await _resolve_contact_or_404(public_key)
+    _require_repeater(contact)
+
+    results = await _batch_cli_fetch(
+        contact,
+        "repeater_owner_info",
+        [
+            ("get owner.info", "owner_info"),
+            ("get guest.password", "guest_password"),
+        ],
+    )
+    return RepeaterOwnerInfoResponse(**results)
+
+
+@router.post("/{public_key}/command", response_model=CommandResponse)
+async def send_repeater_command(public_key: str, request: CommandRequest) -> CommandResponse:
+    """Send a CLI command to a repeater.
+
+    The contact must be a repeater (type=2). The user must have already logged in
+    via the repeater/login endpoint. This endpoint ensures the contact is on the
+    radio before sending commands (the repeater remembers ACL permissions after login).
+
+    Common commands:
+    - get name, set name <value>
+    - get tx, set tx <dbm>
+    - get radio, set radio <freq,bw,sf,cr>
+    - tempradio <freq,bw,sf,cr,minutes>
+    - setperm <pubkey> <permission>  (0=guest, 1=read-only, 2=read-write, 3=admin)
+    - clock, clock sync
+    - reboot
+    - ver
+    """
+    require_connected()
+
+    # Get contact from database
+    contact = await _resolve_contact_or_404(public_key)
+    _require_repeater(contact)
+
+    async with radio_manager.radio_operation(
+        "send_repeater_command",
+        pause_polling=True,
+        suspend_auto_fetch=True,
+    ) as mc:
+        # Add contact to radio with path from DB (non-fatal — contact may already be loaded)
+        logger.info("Adding repeater %s to radio", contact.public_key[:12])
+        await _ensure_on_radio(mc, contact)
+        await asyncio.sleep(1.0)
+
+        # Send the command
+        logger.info("Sending command to repeater %s: %s", contact.public_key[:12], request.command)
+
+        send_result = await mc.commands.send_cmd(contact.public_key, request.command)
+
+        if send_result.type == EventType.ERROR:
+            raise HTTPException(
+                status_code=500, detail=f"Failed to send command: {send_result.payload}"
+            )
+
+        # Wait for response using validated fetch loop
+        response_event = await _fetch_repeater_response(mc, contact.public_key[:12])
+
+        if response_event is None:
+            logger.warning(
+                "No response from repeater %s for command: %s",
+                contact.public_key[:12],
+                request.command,
+            )
+            return CommandResponse(
+                command=request.command,
+                response="(no response - command may have been processed)",
+            )
+
+        # CONTACT_MSG_RECV payloads use sender_timestamp in meshcore.
+        response_text = _extract_response_text(response_event)
+        sender_timestamp = response_event.payload.get(
+            "sender_timestamp",
+            response_event.payload.get("timestamp"),
+        )
+        logger.info("Received response from %s: %s", contact.public_key[:12], response_text)
+
+        return CommandResponse(
+            command=request.command,
+            response=response_text,
+            sender_timestamp=sender_timestamp,
+        )

app/routers/settings.py

@@ -1,3 +1,4 @@
+import asyncio
 import logging
 from typing import Literal
 
@@ -16,7 +17,9 @@ class AppSettingsUpdate(BaseModel):
         default=None,
         ge=1,
         le=1000,
-        description="Maximum non-repeater contacts to keep on radio (1-1000)",
+        description=(
+            "Maximum contacts to keep on radio (favorites first, then recent non-repeaters)"
+        ),
     )
     auto_decrypt_dm_on_advert: bool | None = Field(
         default=None,
@@ -26,6 +29,31 @@ class AppSettingsUpdate(BaseModel):
         default=None,
         description="Sidebar sort order: 'recent' or 'alpha'",
     )
+    advert_interval: int | None = Field(
+        default=None,
+        ge=0,
+        description="Periodic advertisement interval in seconds (0 = disabled, minimum 3600)",
+    )
+    flood_scope: str | None = Field(
+        default=None,
+        description="Outbound flood scope / region name (empty = disabled)",
+    )
+    blocked_keys: list[str] | None = Field(
+        default=None,
+        description="Public keys whose messages are hidden from the UI",
+    )
+    blocked_names: list[str] | None = Field(
+        default=None,
+        description="Display names whose messages are hidden from the UI",
+    )
+
+
+class BlockKeyRequest(BaseModel):
+    key: str = Field(description="Public key to toggle block status")
+
+
+class BlockNameRequest(BaseModel):
+    name: str = Field(description="Display name to toggle block status")
 
 
 class FavoriteRequest(BaseModel):
@@ -33,13 +61,6 @@ class FavoriteRequest(BaseModel):
     id: str = Field(description="Channel key or contact public key")
 
 
-class LastMessageTimeUpdate(BaseModel):
-    state_key: str = Field(
-        description="Conversation state key (e.g., 'channel-KEY' or 'contact-PREFIX')"
-    )
-    timestamp: int = Field(description="Unix timestamp of the last message")
-
-
 class MigratePreferencesRequest(BaseModel):
     favorites: list[FavoriteRequest] = Field(
         default_factory=list,
@@ -85,26 +106,48 @@ async def update_settings(update: AppSettingsUpdate) -> AppSettings:
         logger.info("Updating sidebar_sort_order to %s", update.sidebar_sort_order)
         kwargs["sidebar_sort_order"] = update.sidebar_sort_order
 
+    if update.advert_interval is not None:
+        # Enforce minimum 1-hour interval; 0 means disabled
+        interval = update.advert_interval
+        if 0 < interval < 3600:
+            interval = 3600
+        logger.info("Updating advert_interval to %d", interval)
+        kwargs["advert_interval"] = interval
+
+    # Block lists
+    if update.blocked_keys is not None:
+        kwargs["blocked_keys"] = [k.lower() for k in update.blocked_keys]
+    if update.blocked_names is not None:
+        kwargs["blocked_names"] = update.blocked_names
+
+    # Flood scope
+    flood_scope_changed = False
+    if update.flood_scope is not None:
+        stripped = update.flood_scope.strip()
+        kwargs["flood_scope"] = stripped
+        flood_scope_changed = True
+
     if kwargs:
-        return await AppSettingsRepository.update(**kwargs)
+        result = await AppSettingsRepository.update(**kwargs)
+
+        # Apply flood scope to radio immediately if changed
+        if flood_scope_changed:
+            from app.radio import radio_manager
+
+            if radio_manager.is_connected:
+                try:
+                    scope = result.flood_scope
+                    async with radio_manager.radio_operation("set_flood_scope") as mc:
+                        await mc.commands.set_flood_scope(scope if scope else "")
+                        logger.info("Applied flood_scope=%r to radio", scope or "(disabled)")
+                except Exception as e:
+                    logger.warning("Failed to apply flood_scope to radio: %s", e)
+
+        return result
 
     return await AppSettingsRepository.get()
 
 
-@router.post("/favorites", response_model=AppSettings)
-async def add_favorite(request: FavoriteRequest) -> AppSettings:
-    """Add a conversation to favorites."""
-    logger.info("Adding favorite: %s %s", request.type, request.id[:12])
-    return await AppSettingsRepository.add_favorite(request.type, request.id)
-
-
-@router.delete("/favorites", response_model=AppSettings)
-async def remove_favorite(request: FavoriteRequest) -> AppSettings:
-    """Remove a conversation from favorites."""
-    logger.info("Removing favorite: %s %s", request.type, request.id[:12])
-    return await AppSettingsRepository.remove_favorite(request.type, request.id)
-
-
 @router.post("/favorites/toggle", response_model=AppSettings)
 async def toggle_favorite(request: FavoriteRequest) -> AppSettings:
     """Toggle a conversation's favorite status."""
@@ -113,21 +156,33 @@ async def toggle_favorite(request: FavoriteRequest) -> AppSettings:
 
     if is_favorited:
         logger.info("Removing favorite: %s %s", request.type, request.id[:12])
-        return await AppSettingsRepository.remove_favorite(request.type, request.id)
+        result = await AppSettingsRepository.remove_favorite(request.type, request.id)
     else:
         logger.info("Adding favorite: %s %s", request.type, request.id[:12])
-        return await AppSettingsRepository.add_favorite(request.type, request.id)
+        result = await AppSettingsRepository.add_favorite(request.type, request.id)
+
+    # When a contact favorite changes, sync the radio so the contact is
+    # loaded/unloaded immediately rather than waiting for the next advert.
+    if request.type == "contact":
+        from app.radio_sync import sync_recent_contacts_to_radio
+
+        asyncio.create_task(sync_recent_contacts_to_radio(force=True))
+
+    return result
 
 
-@router.post("/last-message-time")
-async def update_last_message_time(request: LastMessageTimeUpdate) -> dict:
-    """Update the last message time for a conversation.
+@router.post("/blocked-keys/toggle", response_model=AppSettings)
+async def toggle_blocked_key(request: BlockKeyRequest) -> AppSettings:
+    """Toggle a public key's blocked status."""
+    logger.info("Toggling blocked key: %s", request.key[:12])
+    return await AppSettingsRepository.toggle_blocked_key(request.key)
 
-    Used to track when conversations last received messages for sidebar sorting.
-    Only updates if the new timestamp is greater than the existing one.
-    """
-    await AppSettingsRepository.update_last_message_time(request.state_key, request.timestamp)
-    return {"status": "ok"}
+
+@router.post("/blocked-names/toggle", response_model=AppSettings)
+async def toggle_blocked_name(request: BlockNameRequest) -> AppSettings:
+    """Toggle a display name's blocked status."""
+    logger.info("Toggling blocked name: %s", request.name)
+    return await AppSettingsRepository.toggle_blocked_name(request.name)
 
 
 @router.post("/migrate", response_model=MigratePreferencesResponse)

app/routers/statistics.py

@@ -0,0 +1,12 @@
+from fastapi import APIRouter
+
+from app.models import StatisticsResponse
+from app.repository import StatisticsRepository
+
+router = APIRouter(prefix="/statistics", tags=["statistics"])
+
+
+@router.get("", response_model=StatisticsResponse)
+async def get_statistics() -> StatisticsResponse:
+    data = await StatisticsRepository.get_all()
+    return StatisticsResponse(**data)

app/routers/ws.py

@@ -1,13 +1,11 @@
 """WebSocket router for real-time updates."""
 
 import logging
-import os
 
 from fastapi import APIRouter, WebSocket, WebSocketDisconnect
 
-from app.config import settings
 from app.radio import radio_manager
-from app.repository import ChannelRepository, ContactRepository, RawPacketRepository
+from app.routers.health import build_health_data
 from app.websocket import ws_manager
 
 logger = logging.getLogger(__name__)
@@ -16,60 +14,20 @@ router = APIRouter()
 
 @router.websocket("/ws")
 async def websocket_endpoint(websocket: WebSocket) -> None:
-    """WebSocket endpoint for real-time updates."""
+    """WebSocket endpoint for real-time updates.
+
+    Only sends health status on initial connect. Contacts and channels
+    are fetched via REST endpoints for faster parallel loading.
+    """
     await ws_manager.connect(websocket)
 
-    # Send initial state
+    # Send initial health status
     try:
-        # Health status
-        db_size_mb = 0.0
-        try:
-            db_size_bytes = os.path.getsize(settings.database_path)
-            db_size_mb = round(db_size_bytes / (1024 * 1024), 2)
-        except OSError:
-            pass
-
-        # Get oldest undecrypted packet info
-        oldest_ts = None
-        try:
-            oldest_ts = await RawPacketRepository.get_oldest_undecrypted()
-        except RuntimeError:
-            pass  # Database not connected
-
-        health_data = {
-            "status": "ok" if radio_manager.is_connected else "degraded",
-            "radio_connected": radio_manager.is_connected,
-            "serial_port": radio_manager.port,
-            "database_size_mb": db_size_mb,
-            "oldest_undecrypted_timestamp": oldest_ts,
-        }
+        health_data = await build_health_data(
+            radio_manager.is_connected, radio_manager.connection_info
+        )
         await ws_manager.send_personal(websocket, "health", health_data)
 
-        # Contacts - fetch all by paginating until exhausted
-        all_contacts = []
-        chunk_size = 500
-        offset = 0
-        while True:
-            chunk = await ContactRepository.get_all(limit=chunk_size, offset=offset)
-            all_contacts.extend(chunk)
-            if len(chunk) < chunk_size:
-                break
-            offset += chunk_size
-
-        await ws_manager.send_personal(
-            websocket,
-            "contacts",
-            [c.model_dump() for c in all_contacts],
-        )
-
-        # Channels
-        channels = await ChannelRepository.get_all()
-        await ws_manager.send_personal(
-            websocket,
-            "channels",
-            [c.model_dump() for c in channels],
-        )
-
     except Exception as e:
         logger.error("Error sending initial state: %s", e)
 

app/websocket.py

@@ -3,13 +3,10 @@
 import asyncio
 import json
 import logging
-import os
 from typing import Any
 
 from fastapi import WebSocket
 
-from app.config import settings
-
 logger = logging.getLogger(__name__)
 
 # Timeout for individual WebSocket send operations (seconds)
@@ -95,14 +92,27 @@ class WebSocketManager:
 ws_manager = WebSocketManager()
 
 
-def broadcast_event(event_type: str, data: dict) -> None:
+def broadcast_event(event_type: str, data: dict, *, realtime: bool = True) -> None:
     """Schedule a broadcast without blocking.
 
     Convenience function that creates an asyncio task to broadcast
-    an event to all connected WebSocket clients.
+    an event to all connected WebSocket clients and forward to fanout modules.
+
+    Args:
+        event_type: Event type string (e.g. "message", "raw_packet")
+        data: Event payload dict
+        realtime: If False, skip fanout dispatch (used for historical decryption)
     """
     asyncio.create_task(ws_manager.broadcast(event_type, data))
 
+    if realtime:
+        from app.fanout.manager import fanout_manager
+
+        if event_type == "message":
+            asyncio.create_task(fanout_manager.broadcast_message(data))
+        elif event_type == "raw_packet":
+            asyncio.create_task(fanout_manager.broadcast_raw(data))
+
 
 def broadcast_error(message: str, details: str | None = None) -> None:
     """Broadcast an error notification to all connected clients.
@@ -126,35 +136,13 @@ def broadcast_success(message: str, details: str | None = None) -> None:
     asyncio.create_task(ws_manager.broadcast("success", data))
 
 
-def broadcast_health(radio_connected: bool, serial_port: str | None = None) -> None:
+def broadcast_health(radio_connected: bool, connection_info: str | None = None) -> None:
     """Broadcast health status change to all connected clients."""
-    from app.repository import RawPacketRepository
 
     async def _broadcast():
-        # Get database file size in MB
-        db_size_mb = 0.0
-        try:
-            db_size_bytes = os.path.getsize(settings.database_path)
-            db_size_mb = round(db_size_bytes / (1024 * 1024), 2)
-        except OSError:
-            pass
+        from app.routers.health import build_health_data
 
-        # Get oldest undecrypted packet info
-        oldest_ts = None
-        try:
-            oldest_ts = await RawPacketRepository.get_oldest_undecrypted()
-        except RuntimeError:
-            pass  # Database not connected
-
-        await ws_manager.broadcast(
-            "health",
-            {
-                "status": "ok" if radio_connected else "degraded",
-                "radio_connected": radio_connected,
-                "serial_port": serial_port,
-                "database_size_mb": db_size_mb,
-                "oldest_undecrypted_timestamp": oldest_ts,
-            },
-        )
+        data = await build_health_data(radio_connected, connection_info)
+        await ws_manager.broadcast("health", data)
 
     asyncio.create_task(_broadcast())

docker-compose.yaml

@@ -0,0 +1,32 @@
+services:
+  remoteterm:
+    build: .
+    # image: jkingsman/remoteterm-meshcore:latest
+
+    # Optional on Linux: run container as your host user to avoid root-owned files in ./data
+    # user: "${UID:-1000}:${GID:-1000}"
+    ports:
+      - "8000:8000"
+    volumes:
+      - ./data:/app/data
+    ################################################
+    # Set your serial device for passthrough here! #
+    ################################################
+    devices:
+      - /dev/ttyACM0:/dev/ttyUSB0
+
+    environment:
+      MESHCORE_DATABASE_PATH: data/meshcore.db
+      # Radio connection -- optional if you map just a single serial device above, as the app will autodetect
+
+      # Serial (USB)
+      # MESHCORE_SERIAL_PORT: /dev/ttyUSB0
+      # MESHCORE_SERIAL_BAUDRATE: 115200
+
+      # TCP
+      # MESHCORE_TCP_HOST: 192.168.1.100
+      # MESHCORE_TCP_PORT: 4000
+
+      # Logging
+      # MESHCORE_LOG_LEVEL: INFO
+    restart: unless-stopped

frontend/.npmrc

@@ -0,0 +1 @@
+install-links=true

frontend/AGENTS.md

@@ -0,0 +1,361 @@
+# Frontend AGENTS.md
+
+This document is the frontend working guide for agents and developers.
+Keep it aligned with `frontend/src` source code.
+
+## Stack
+
+- React 18 + TypeScript
+- Vite
+- Vitest + Testing Library
+- shadcn/ui primitives
+- Tailwind utility classes + local CSS (`index.css`, `styles.css`)
+- Sonner (toasts)
+- Leaflet / react-leaflet (map)
+- `@michaelhart/meshcore-decoder` installed via npm alias to `meshcore-decoder-multibyte-patch`
+- `meshcore-hashtag-cracker` + `nosleep.js` (channel cracker)
+- Multibyte-aware decoder build published as `meshcore-decoder-multibyte-patch`
+
+## Frontend Map
+
+```text
+frontend/src/
+├── main.tsx                # React entry point (StrictMode, root render)
+├── App.tsx                 # App shell and orchestration
+├── api.ts                  # Typed REST client
+├── types.ts                # Shared TS contracts
+├── useWebSocket.ts         # WS lifecycle + event dispatch
+├── messageCache.ts         # Conversation-scoped cache
+├── prefetch.ts             # Consumes prefetched API promises started in index.html
+├── index.css               # Global styles/utilities
+├── styles.css              # Additional global app styles
+├── themes.css              # Color theme definitions
+├── lib/
+│   └── utils.ts            # cn() — clsx + tailwind-merge helper
+├── hooks/
+│   ├── index.ts            # Central re-export of all hooks
+│   ├── useConversationMessages.ts  # Fetch, pagination, dedup, ACK buffering
+│   ├── useUnreadCounts.ts          # Unread counters, mentions, recent-sort timestamps
+│   ├── useRepeaterDashboard.ts      # Repeater dashboard state (login, panes, console, retries)
+│   ├── useRadioControl.ts          # Radio health/config state, reconnection
+│   ├── useAppSettings.ts           # Settings, favorites, preferences migration
+│   ├── useConversationRouter.ts    # URL hash → active conversation routing
+│   └── useContactsAndChannels.ts   # Contact/channel loading, creation, deletion
+├── utils/
+│   ├── urlHash.ts              # Hash parsing and encoding
+│   ├── conversationState.ts    # State keys, in-memory + localStorage helpers
+│   ├── favorites.ts            # LocalStorage migration for favorites
+│   ├── messageParser.ts        # Message text → rendered segments
+│   ├── pathUtils.ts            # Distance/validation helpers for paths + map
+│   ├── pubkey.ts               # getContactDisplayName (12-char prefix fallback)
+│   ├── contactAvatar.ts        # Avatar color derivation from public key
+│   ├── rawPacketIdentity.ts    # observation_id vs id dedup helpers
+│   ├── visualizerUtils.ts      # 3D visualizer node types, colors, particles
+│   ├── visualizerSettings.ts   # LocalStorage persistence for visualizer options
+│   ├── a11y.ts                 # Keyboard accessibility helper
+│   ├── lastViewedConversation.ts   # localStorage for last-viewed conversation
+│   ├── contactMerge.ts            # Merge WS contact updates into list
+│   ├── localLabel.ts              # Local label (text + color) in localStorage
+│   ├── radioPresets.ts            # LoRa radio preset configurations
+│   └── theme.ts                   # Theme switching helpers
+├── components/
+│   ├── StatusBar.tsx
+│   ├── Sidebar.tsx
+│   ├── ChatHeader.tsx          # Conversation header (trace, favorite, delete)
+│   ├── MessageList.tsx
+│   ├── MessageInput.tsx
+│   ├── NewMessageModal.tsx
+│   ├── SearchView.tsx          # Full-text message search pane
+│   ├── SettingsModal.tsx       # Layout shell — delegates to settings/ sections
+│   ├── RawPacketList.tsx
+│   ├── MapView.tsx
+│   ├── VisualizerView.tsx
+│   ├── PacketVisualizer3D.tsx
+│   ├── PathModal.tsx
+│   ├── PathRouteMap.tsx
+│   ├── CrackerPanel.tsx
+│   ├── BotCodeEditor.tsx
+│   ├── ContactAvatar.tsx
+│   ├── ContactInfoPane.tsx     # Contact detail sheet (stats, name history, paths)
+│   ├── ContactStatusInfo.tsx   # Contact status info component
+│   ├── RepeaterDashboard.tsx   # Layout shell — delegates to repeater/ panes
+│   ├── RepeaterLogin.tsx       # Repeater login form (password + guest)
+│   ├── ChannelInfoPane.tsx     # Channel detail sheet (stats, top senders)
+│   ├── NeighborsMiniMap.tsx    # Leaflet mini-map for repeater neighbor locations
+│   ├── settings/
+│   │   ├── settingsConstants.ts          # Settings section type, ordering, labels
+│   │   ├── SettingsRadioSection.tsx      # Name, keys, advert interval, max contacts, radio preset, freq/bw/sf/cr, txPower, lat/lon, reboot
+│   │   ├── SettingsLocalSection.tsx      # Browser-local settings: theme, local label, reopen last conversation
+│   │   ├── SettingsFanoutSection.tsx     # Fanout integrations: MQTT, bots, config CRUD
+│   │   ├── SettingsDatabaseSection.tsx   # DB size, cleanup, auto-decrypt, local label
+│   │   ├── SettingsStatisticsSection.tsx # Read-only mesh network stats
+│   │   ├── SettingsAboutSection.tsx     # Version, author, license, links
+│   │   └── ThemeSelector.tsx           # Color theme picker
+│   ├── repeater/
+│   │   ├── repeaterPaneShared.tsx        # Shared: RepeaterPane, KvRow, format helpers
+│   │   ├── RepeaterTelemetryPane.tsx    # Battery, airtime, packet counts
+│   │   ├── RepeaterNeighborsPane.tsx    # Neighbor table + lazy mini-map
+│   │   ├── RepeaterAclPane.tsx          # Permission table
+│   │   ├── RepeaterRadioSettingsPane.tsx # Radio settings + advert intervals
+│   │   ├── RepeaterLppTelemetryPane.tsx # CayenneLPP sensor data
+│   │   ├── RepeaterOwnerInfoPane.tsx    # Owner info + guest password
+│   │   ├── RepeaterActionsPane.tsx      # Send Advert, Sync Clock, Reboot
+│   │   └── RepeaterConsolePane.tsx      # CLI console with history
+│   └── ui/                     # shadcn/ui primitives
+├── types/
+│   ├── d3-force-3d.d.ts       # Type declarations for d3-force-3d
+│   └── globals.d.ts           # Global type declarations (__APP_VERSION__, __COMMIT_HASH__)
+└── test/
+    ├── setup.ts
+    ├── fixtures/websocket_events.json
+    ├── api.test.ts
+    ├── appFavorites.test.tsx
+    ├── appStartupHash.test.tsx
+    ├── contactAvatar.test.ts
+    ├── integration.test.ts
+    ├── messageCache.test.ts
+    ├── messageParser.test.ts
+    ├── pathUtils.test.ts
+    ├── prefetch.test.ts
+    ├── radioPresets.test.ts
+    ├── rawPacketIdentity.test.ts
+    ├── repeaterDashboard.test.tsx
+    ├── repeaterFormatters.test.ts
+    ├── repeaterLogin.test.tsx
+    ├── repeaterMessageParsing.test.ts
+    ├── localLabel.test.ts
+    ├── messageInput.test.tsx
+    ├── newMessageModal.test.tsx
+    ├── settingsModal.test.tsx
+    ├── sidebar.test.tsx
+    ├── unreadCounts.test.ts
+    ├── urlHash.test.ts
+    ├── appSearchJump.test.tsx
+    ├── channelInfoKeyVisibility.test.tsx
+    ├── chatHeaderKeyVisibility.test.tsx
+    ├── searchView.test.tsx
+    ├── useConversationMessages.test.ts
+    ├── useConversationMessages.race.test.ts
+    ├── useRepeaterDashboard.test.ts
+    ├── useContactsAndChannels.test.ts
+    ├── useWebSocket.dispatch.test.ts
+    └── useWebSocket.lifecycle.test.ts
+
+```
+
+## Architecture Notes
+
+### State ownership
+
+`App.tsx` orchestrates high-level state and delegates to hooks:
+- `useRadioControl`: radio health/config state, reconnect/reboot polling
+- `useAppSettings`: settings CRUD, favorites, preferences migration
+- `useContactsAndChannels`: contact/channel lists, creation, deletion
+- `useConversationRouter`: URL hash → active conversation routing
+- `useConversationMessages`: fetch, pagination, dedup/update helpers
+- `useUnreadCounts`: unread counters, mention tracking, recent-sort timestamps
+- `useRepeaterDashboard`: repeater dashboard state (login, pane data/retries, console, actions)
+
+### Initial load + realtime
+
+- Initial data: REST fetches (`api.ts`) for config/settings/channels/contacts/unreads.
+- WebSocket: realtime deltas/events.
+- On WS connect, backend sends `health` only; contacts/channels still come from REST.
+
+### New Message modal
+
+`NewMessageModal` resets form state on close. The component instance persists across open/close cycles for smooth animations.
+
+### Message behavior
+
+- Outgoing sends are added to UI after the send API returns (not pre-send optimistic insertion), then persisted server-side.
+- Backend also emits WS `message` for outgoing sends so other clients stay in sync.
+- ACK/repeat updates arrive as `message_acked` events.
+- Outgoing channel messages show a 30-second resend control; resend calls `POST /api/messages/channel/{message_id}/resend`.
+
+### Visualizer behavior
+
+- `VisualizerView.tsx` hosts `PacketVisualizer3D.tsx` (desktop split-pane and mobile tabs).
+- `PacketVisualizer3D` uses persistent Three.js geometries for links/highlights/particles and updates typed-array buffers in-place per frame.
+- Packet repeat aggregation keys prefer decoder `messageHash` (path-insensitive), with hash fallback for malformed packets.
+- Raw-packet decoding in `RawPacketList.tsx` and `visualizerUtils.ts` relies on the multibyte-aware decoder fork; keep frontend packet parsing aligned with backend `path_utils.py`.
+- Raw packet events carry both:
+  - `id`: backend storage row identity (payload-level dedup)
+  - `observation_id`: realtime per-arrival identity (session fidelity)
+- Packet feed/visualizer render keys and dedup logic should use `observation_id` (fallback to `id` only for older payloads).
+
+### Radio settings behavior
+
+- `SettingsRadioSection.tsx` surfaces `path_hash_mode` only when `config.path_hash_mode_supported` is true.
+- Frontend `path_len` fields are hop counts, not raw byte lengths; multibyte path rendering must use the accompanying metadata before splitting hop identifiers.
+
+## WebSocket (`useWebSocket.ts`)
+
+- Auto reconnect (3s) with cleanup guard on unmount.
+- Heartbeat ping every 30s.
+- Event handlers: `health`, `message`, `contact`, `raw_packet`, `message_acked`, `contact_deleted`, `channel_deleted`, `error`, `success`, `pong` (ignored).
+- For `raw_packet` events, use `observation_id` as event identity; `id` is a storage reference and may repeat.
+
+## URL Hash Navigation (`utils/urlHash.ts`)
+
+Supported routes:
+- `#raw`
+- `#map`
+- `#map/focus/{pubkey_or_prefix}`
+- `#visualizer`
+- `#search`
+- `#channel/{channelKey}`
+- `#channel/{channelKey}/{label}`
+- `#contact/{publicKey}`
+- `#contact/{publicKey}/{label}`
+
+Legacy name-based hashes are still accepted for compatibility.
+
+## Conversation State Keys (`utils/conversationState.ts`)
+
+`getStateKey(type, id)` produces:
+- channels: `channel-{channelKey}`
+- contacts: `contact-{publicKey}`
+
+Use full contact public key here (not 12-char prefix).
+
+`conversationState.ts` keeps an in-memory cache and localStorage helpers used for migration/compatibility.
+Canonical persistence for unread and sort metadata is server-side (`app_settings` + read-state endpoints).
+
+## Utilities
+
+### `utils/pubkey.ts`
+
+Current public export:
+- `getContactDisplayName(name, pubkey)`
+
+It falls back to a 12-char prefix when `name` is missing.
+
+### `utils/pathUtils.ts`
+
+Distance/validation helpers used by path + map UI.
+
+### `utils/favorites.ts`
+
+LocalStorage migration helpers for favorites; canonical favorites are server-side.
+
+## Types and Contracts (`types.ts`)
+
+`AppSettings` currently includes:
+- `max_radio_contacts`
+- `favorites`
+- `auto_decrypt_dm_on_advert`
+- `sidebar_sort_order`
+- `last_message_times`
+- `preferences_migrated`
+- `advert_interval`
+- `last_advert_time`
+- `flood_scope`
+- `blocked_keys`, `blocked_names`
+
+Note: MQTT, bot, and community MQTT settings were migrated to the `fanout_configs` table (managed via `/api/fanout`). They are no longer part of `AppSettings`.
+
+`HealthStatus` includes `fanout_statuses: Record<string, FanoutStatusEntry>` mapping config IDs to `{name, type, status}`. Also includes `bots_disabled: boolean`.
+
+`FanoutConfig` represents a single fanout integration: `{id, type, name, enabled, config, scope, sort_order, created_at}`.
+
+`RawPacket.decrypted_info` includes `channel_key` and `contact_key` for MQTT topic routing.
+
+## Contact Info Pane
+
+Clicking a contact's avatar in `ChatHeader` or `MessageList` opens a `ContactInfoPane` sheet (right drawer) showing comprehensive contact details fetched from `GET /api/contacts/{key}/detail`:
+
+- Header: avatar, name, public key, type badge, on-radio badge
+- Info grid: last seen, first heard, last contacted, distance, hops
+- GPS location (clickable → map)
+- Favorite toggle
+- Name history ("Also Known As") — shown only when the contact has used multiple names
+- Message stats: DM count, channel message count
+- Most active rooms (clickable → navigate to channel)
+- Advert observation rate
+- Nearest repeaters (resolved from first-hop path prefixes)
+- Recent advert paths
+
+State: `infoPaneContactKey` in App.tsx controls open/close. Live contact data from WebSocket updates is preferred over the initial detail snapshot.
+
+## Channel Info Pane
+
+Clicking a channel name in `ChatHeader` opens a `ChannelInfoPane` sheet (right drawer) showing channel details fetched from `GET /api/channels/{key}/detail`:
+
+- Header: channel name, key (clickable copy), type badge (hashtag/private key), on-radio badge
+- Favorite toggle
+- Message activity: time-windowed counts (1h, 24h, 48h, 7d, all time) + unique senders
+- First message date
+- Top senders in last 24h (name + count)
+
+State: `infoPaneChannelKey` in App.tsx controls open/close. Live channel data from the `channels` array is preferred over the initial detail snapshot.
+
+## Repeater Dashboard
+
+For repeater contacts (`type=2`), App.tsx renders `RepeaterDashboard` instead of the normal chat UI (ChatHeader + MessageList + MessageInput).
+
+**Login**: `RepeaterLogin` component — password or guest login via `POST /api/contacts/{key}/repeater/login`.
+
+**Dashboard panes** (after login): Telemetry, Neighbors, ACL, Radio Settings, Advert Intervals, Owner Info — each fetched via granular `POST /api/contacts/{key}/repeater/{pane}` endpoints. Panes retry up to 3 times client-side. "Load All" fetches all panes serially (parallel would queue behind the radio lock).
+
+**Actions pane**: Send Advert, Sync Clock, Reboot — all send CLI commands via `POST /api/contacts/{key}/command`.
+
+**Console pane**: Full CLI access via the same command endpoint. History is ephemeral (not persisted to DB).
+
+All state is managed by `useRepeaterDashboard` hook. State resets on conversation change.
+
+## Message Search Pane
+
+The `SearchView` component (`components/SearchView.tsx`) provides full-text search across all DMs and channel messages. Key behaviors:
+
+- **State**: `targetMessageId` in `App.tsx` drives the jump-to-message flow. When a search result is clicked, `handleNavigateToMessage` sets `targetMessageId` and switches to the target conversation.
+- **Persistence**: `SearchView` stays mounted after first open using the same `hidden` class pattern as `CrackerPanel`, preserving search state when navigating to results.
+- **Jump-to-message**: `useConversationMessages` accepts optional `targetMessageId`. When set, it calls `api.getMessagesAround()` instead of normal fetch, loading context around the target message. `MessageList` scrolls to the target via `data-message-id` attribute and applies a `message-highlight` CSS animation.
+- **Bidirectional pagination**: After jumping mid-history, `hasNewerMessages` enables forward pagination via `fetchNewerMessages`. The scroll-to-bottom button calls `jumpToBottom` (re-fetches latest page) instead of just scrolling.
+- **WS message suppression**: When `hasNewerMessages` is true, incoming WS messages for the active conversation are not added to the message list (the user is viewing historical context, not the latest page).
+
+## Styling
+
+UI styling is mostly utility-class driven (Tailwind-style classes in JSX) plus shared globals in `index.css` and `styles.css`.
+Do not rely on old class-only layout assumptions.
+
+## Security Posture (intentional)
+
+- No authentication UI.
+- Frontend assumes trusted network usage.
+- Bot editor intentionally allows arbitrary backend bot code configuration.
+
+## Testing
+
+Run all quality checks (backend + frontend) from the repo root:
+
+```bash
+./scripts/all_quality.sh
+```
+
+Or run frontend checks individually:
+
+```bash
+cd frontend
+npm run test:run
+npm run build
+```
+
+When touching cross-layer contracts, also run backend tests from repo root:
+
+```bash
+PYTHONPATH=. uv run pytest tests/ -v
+```
+
+## Errata & Known Non-Issues
+
+### RawPacketList always scrolls to bottom
+
+`RawPacketList` unconditionally scrolls to the latest packet on every update. This is intentional — the packet feed is a live status display, not an interactive log meant for lingering or long-term analysis. Users watching it want to see the newest packet, not hold a scroll position.
+
+## Editing Checklist
+
+1. If API/WS payloads change, update `types.ts`, handlers, and tests.
+2. If URL/hash behavior changes, update `utils/urlHash.ts` tests.
+3. If read/unread semantics change, update `useUnreadCounts` tests.
+4. Keep this file concise; prefer source links over speculative detail.

frontend/CLAUDE.md

@@ -1,718 +0,0 @@
-# Frontend CLAUDE.md
-
-This document provides context for AI assistants and developers working on the React frontend.
-
-## Technology Stack
-
-- **React 18** - UI framework with hooks
-- **TypeScript** - Type safety
-- **Vite** - Build tool with HMR
-- **Vitest** - Testing framework
-- **Sonner** - Toast notifications
-- **shadcn/ui components** - Sheet, Tabs, Button (in `components/ui/`)
-- **meshcore-hashtag-cracker** - WebGPU-accelerated channel key bruteforcing
-- **nosleep.js** - Prevents device sleep during cracking
-- **leaflet / react-leaflet** - Interactive map for node locations
-
-## Directory Structure
-
-```
-frontend/
-├── src/
-│   ├── main.tsx              # Entry point, renders App
-│   ├── App.tsx               # Main component, all state management
-│   ├── api.ts                # REST API client
-│   ├── types.ts              # TypeScript interfaces
-│   ├── useWebSocket.ts       # WebSocket hook with auto-reconnect
-│   ├── styles.css            # Dark theme CSS
-│   ├── utils/
-│   │   ├── messageParser.ts  # Text parsing utilities
-│   │   ├── conversationState.ts  # localStorage for message times (sidebar sorting)
-│   │   ├── pubkey.ts         # Public key utilities (prefix matching, display names)
-│   │   └── contactAvatar.ts  # Avatar generation (colors, initials/emoji)
-│   ├── components/
-│   │   ├── ui/               # shadcn/ui components
-│   │   │   ├── sonner.tsx    # Toast notifications (Sonner wrapper)
-│   │   │   ├── sheet.tsx     # Slide-out panel
-│   │   │   ├── tabs.tsx      # Tab navigation
-│   │   │   └── button.tsx    # Button component
-│   │   ├── StatusBar.tsx     # Radio status, reconnect button, config button
-│   │   ├── Sidebar.tsx       # Contacts/channels list, search, unread badges
-│   │   ├── MessageList.tsx   # Message display, avatars, clickable senders
-│   │   ├── MessageInput.tsx  # Text input with imperative handle
-│   │   ├── ContactAvatar.tsx # Contact profile image component
-│   │   ├── RawPacketList.tsx # Raw packet feed display
-│   │   ├── MapView.tsx       # Leaflet map showing node locations
-│   │   ├── CrackerPanel.tsx  # WebGPU channel key cracker (lazy-loads wordlist)
-│   │   ├── NewMessageModal.tsx
-│   │   └── SettingsModal.tsx # Unified settings: radio config, identity, serial, database, advertise
-│   └── test/
-│       ├── setup.ts          # Test setup (jsdom, matchers)
-│       ├── messageParser.test.ts
-│       ├── unreadCounts.test.ts
-│       ├── contactAvatar.test.ts
-│       ├── messageDeduplication.test.ts
-│       └── websocket.test.ts
-├── index.html
-├── vite.config.ts            # API proxy config
-├── tsconfig.json
-└── package.json
-```
-
-## State Management
-
-All application state lives in `App.tsx` using React hooks. No external state library.
-
-### Core State
-
-```typescript
-const [health, setHealth] = useState<HealthStatus | null>(null);
-const [config, setConfig] = useState<RadioConfig | null>(null);
-const [appSettings, setAppSettings] = useState<AppSettings | null>(null);
-const [contacts, setContacts] = useState<Contact[]>([]);
-const [channels, setChannels] = useState<Channel[]>([]);
-const [messages, setMessages] = useState<Message[]>([]);
-const [rawPackets, setRawPackets] = useState<RawPacket[]>([]);
-const [activeConversation, setActiveConversation] = useState<Conversation | null>(null);
-const [unreadCounts, setUnreadCounts] = useState<Record<string, number>>({});
-```
-
-### App Settings
-
-App settings are stored server-side and include:
-- `favorites` - List of favorited conversations (channels/contacts)
-- `sidebar_sort_order` - 'recent' or 'alpha'
-- `auto_decrypt_dm_on_advert` - Auto-decrypt historical DMs on new contact
-- `last_message_times` - Map of conversation keys to last message timestamps
-
-**Migration**: On first load, localStorage preferences are migrated to the server.
-The `preferences_migrated` flag prevents duplicate migrations.
-
-### State Flow
-
-1. **WebSocket** pushes real-time updates (health, contacts, channels, messages)
-2. **REST API** fetches initial data and handles user actions
-3. **Components** receive state as props, call handlers to trigger changes
-
-### Conversation Header
-
-For contacts, the header shows path information alongside "Last heard":
-- `(Last heard: 10:30 AM, direct)` - Direct neighbor (path_len=0)
-- `(Last heard: 10:30 AM, 2 hops)` - Routed through repeaters (path_len>0)
-- `(Last heard: 10:30 AM, flood)` - No known path (path_len=-1)
-
-## WebSocket (`useWebSocket.ts`)
-
-The `useWebSocket` hook manages real-time connection:
-
-```typescript
-const wsHandlers = useMemo(() => ({
-  onHealth: (data: HealthStatus) => setHealth(data),
-  onMessage: (msg: Message) => { /* add to list, track unread */ },
-  onMessageAcked: (messageId: number, ackCount: number) => { /* update ack count */ },
-  // ...
-}), []);
-
-useWebSocket(wsHandlers);
-```
-
-### Features
-
-- **Auto-reconnect**: Reconnects after 3 seconds on disconnect
-- **Heartbeat**: Sends ping every 30 seconds
-- **Event types**: `health`, `contacts`, `channels`, `message`, `contact`, `raw_packet`, `message_acked`, `error`
-- **Error handling**: `onError` handler displays toast notifications for backend errors
-
-### URL Detection
-
-```typescript
-const isDev = window.location.port === '5173';
-const wsUrl = isDev
-  ? 'ws://localhost:8000/api/ws'
-  : `${protocol}//${window.location.host}/api/ws`;
-```
-
-## API Client (`api.ts`)
-
-Typed REST client with consistent error handling:
-
-```typescript
-import { api } from './api';
-
-// Health
-await api.getHealth();
-
-// Radio
-await api.getRadioConfig();
-await api.updateRadioConfig({ name: 'MyRadio' });
-await api.sendAdvertisement(true);
-
-// Contacts/Channels
-await api.getContacts();
-await api.createContact(publicKey, name, tryHistorical);  // Create contact, optionally decrypt historical DMs
-await api.getChannels();
-await api.createChannel('#test');
-
-// Messages
-await api.getMessages({ type: 'CHAN', conversation_key: channelKey, limit: 200 });
-await api.sendChannelMessage(channelKey, 'Hello');
-await api.sendDirectMessage(publicKey, 'Hello');
-
-// Historical decryption
-await api.decryptHistoricalPackets({ key_type: 'channel', channel_name: '#test' });
-
-// Radio reconnection
-await api.reconnectRadio();  // Returns { status, message, connected }
-
-// Repeater telemetry
-await api.requestTelemetry(publicKey, password);  // Returns TelemetryResponse
-
-// Repeater CLI commands (after login)
-await api.sendRepeaterCommand(publicKey, 'ver');  // Returns CommandResponse
-```
-
-### API Proxy (Development)
-
-Vite proxies `/api/*` to backend (backend routes are already prefixed with `/api`):
-
-```typescript
-// vite.config.ts
-server: {
-  proxy: {
-    '/api': {
-      target: 'http://localhost:8000',
-      changeOrigin: true,
-    },
-  },
-}
-```
-
-## Type Definitions (`types.ts`)
-
-### Key Type Aliases
-
-```typescript
-type PublicKey = string;     // 64-char hex identifying a contact/node
-type PubkeyPrefix = string;  // 12-char hex prefix (used in message routing)
-type ChannelKey = string;    // 32-char hex identifying a channel
-```
-
-### Key Interfaces
-
-```typescript
-interface Contact {
-  public_key: PublicKey;
-  name: string | null;
-  type: number;            // 0=unknown, 1=client, 2=repeater, 3=room
-  on_radio: boolean;
-  last_path_len: number;   // -1=flood, 0=direct, >0=hops through repeaters
-  last_path: string | null; // Hex routing path
-  last_seen: number | null; // Unix timestamp
-  // ...
-}
-
-interface Channel {
-  key: ChannelKey;
-  name: string;
-  is_hashtag: boolean;
-  on_radio: boolean;
-}
-
-interface Message {
-  id: number;
-  type: 'PRIV' | 'CHAN';
-  conversation_key: string;  // PublicKey for PRIV, ChannelKey for CHAN
-  text: string;
-  outgoing: boolean;
-  acked: number;  // 0=not acked, 1+=ack count (flood echoes)
-  // ...
-}
-
-interface Conversation {
-  type: 'contact' | 'channel' | 'raw' | 'map';
-  id: string;              // PublicKey for contacts, ChannelKey for channels, 'raw'/'map' for special views
-  name: string;
-}
-
-interface Favorite {
-  type: 'channel' | 'contact';
-  id: string;  // Channel key or contact public key
-}
-
-interface AppSettings {
-  max_radio_contacts: number;
-  favorites: Favorite[];
-  auto_decrypt_dm_on_advert: boolean;
-  sidebar_sort_order: 'recent' | 'alpha';
-  last_message_times: Record<string, number>;
-  preferences_migrated: boolean;
-}
-
-// Repeater telemetry types
-interface NeighborInfo {
-  pubkey_prefix: string;
-  name: string | null;
-  snr: number;
-  last_heard_seconds: number;
-}
-
-interface AclEntry {
-  pubkey_prefix: string;
-  name: string | null;
-  permission: number;
-  permission_name: string;
-}
-
-interface TelemetryResponse {
-  battery_volts: number;
-  uptime_seconds: number;
-  // ... status fields
-  neighbors: NeighborInfo[];
-  acl: AclEntry[];
-}
-
-interface CommandResponse {
-  command: string;
-  response: string;
-  sender_timestamp: number | null;
-}
-```
-
-## Component Patterns
-
-### MessageInput with Imperative Handle
-
-Exposes `appendText` method for click-to-mention:
-
-```typescript
-export interface MessageInputHandle {
-  appendText: (text: string) => void;
-}
-
-export const MessageInput = forwardRef<MessageInputHandle, MessageInputProps>(
-  function MessageInput({ onSend, disabled, isRepeaterMode }, ref) {
-    useImperativeHandle(ref, () => ({
-      appendText: (text: string) => {
-        setText((prev) => prev + text);
-        inputRef.current?.focus();
-      },
-    }));
-    // ...
-  }
-);
-
-// Usage in App.tsx
-const messageInputRef = useRef<MessageInputHandle>(null);
-messageInputRef.current?.appendText(`@[${sender}] `);
-```
-
-### Repeater Mode
-
-Repeater contacts (type=2) have a two-phase interaction:
-
-**Phase 1: Login (password mode)**
-- Input type changes to `password`
-- Button shows "Fetch" instead of "Send"
-- Enter "." for empty password (converted to empty string)
-- Submitting requests telemetry + logs in
-
-**Phase 2: CLI commands (after login)**
-- Input switches back to normal text
-- Placeholder shows "Enter CLI command..."
-- Commands sent via `/contacts/{key}/command` endpoint
-- Responses displayed as local messages (not persisted to database)
-
-```typescript
-// State tracking
-const [repeaterLoggedIn, setRepeaterLoggedIn] = useState(false);
-
-// Reset on conversation change
-useEffect(() => {
-  setRepeaterLoggedIn(false);
-}, [activeConversation?.id]);
-
-// Mode switches after successful telemetry
-const isRepeaterMode = activeContactIsRepeater && !repeaterLoggedIn;
-
-<MessageInput
-  onSend={isRepeaterMode ? handleTelemetryRequest :
-          (repeaterLoggedIn ? handleRepeaterCommand : handleSendMessage)}
-  isRepeaterMode={isRepeaterMode}
-  placeholder={repeaterLoggedIn ? 'Enter CLI command...' : undefined}
-/>
-```
-
-Telemetry response is displayed as three local messages (not persisted):
-1. **Telemetry** - Battery voltage, uptime, signal quality, packet stats
-2. **Neighbors** - Sorted by SNR (highest first), with resolved names
-3. **ACL** - Access control list with permission levels
-
-### Repeater Message Rendering
-
-Repeater CLI responses often contain colons (e.g., `clock: 12:30:00`). To prevent
-incorrect sender parsing, MessageList skips `parseSenderFromText()` for repeater contacts:
-
-```typescript
-const isRepeater = contact?.type === CONTACT_TYPE_REPEATER;
-const { sender, content } = isRepeater
-  ? { sender: null, content: msg.text }  // Preserve full text
-  : parseSenderFromText(msg.text);
-```
-
-### Unread Count Tracking
-
-Uses refs to avoid stale closures in memoized handlers:
-
-```typescript
-const activeConversationRef = useRef<Conversation | null>(null);
-
-// Keep ref in sync
-useEffect(() => {
-  activeConversationRef.current = activeConversation;
-}, [activeConversation]);
-
-// In WebSocket handler (can safely access current value)
-const activeConv = activeConversationRef.current;
-```
-
-### State Tracking Keys
-
-State tracking keys (for message times used in sidebar sorting) are generated by `getStateKey()`:
-
-```typescript
-import { getStateKey } from './utils/conversationState';
-
-// Channels: "channel-{channelKey}"
-getStateKey('channel', channelKey)  // e.g., "channel-8B3387E9C5CDEA6AC9E5EDBAA115CD72"
-
-// Contacts: "contact-{12-char-prefix}"
-getStateKey('contact', publicKey)   // e.g., "contact-abc123def456"
-```
-
-**Note:** `getStateKey()` is NOT the same as `Message.conversation_key`. The state key is prefixed
-for local state tracking, while `conversation_key` is the raw database field.
-
-### Read State (Server-Side)
-
-Unread tracking uses server-side `last_read_at` timestamps for cross-device consistency:
-
-```typescript
-// Contacts and channels include last_read_at from server
-interface Contact {
-  // ...
-  last_read_at: number | null;  // Unix timestamp when conversation was last read
-}
-
-// Mark as read via API (called automatically when viewing conversation)
-await api.markContactRead(publicKey);
-await api.markChannelRead(channelKey);
-await api.markAllRead();  // Bulk mark all as read
-```
-
-Unread count = messages where `received_at > last_read_at`.
-
-## Utility Functions
-
-### Message Parser (`utils/messageParser.ts`)
-
-```typescript
-// Parse "sender: message" format from channel messages
-parseSenderFromText(text: string): { sender: string | null; content: string }
-
-// Format Unix timestamp to time string
-formatTime(timestamp: number): string
-```
-
-### Public Key Utilities (`utils/pubkey.ts`)
-
-Consistent handling of 64-char full keys and 12-char prefixes:
-
-```typescript
-import { getPubkeyPrefix, pubkeysMatch, getContactDisplayName } from './utils/pubkey';
-
-// Extract 12-char prefix (works with full keys or existing prefixes)
-getPubkeyPrefix(key)  // "abc123def456..."
-
-// Compare keys by prefix (handles mixed full/prefix comparisons)
-pubkeysMatch(key1, key2)  // true if prefixes match
-
-// Get display name with fallback to prefix
-getContactDisplayName(name, publicKey)  // name or first 12 chars of key
-```
-
-### Conversation State (`utils/conversationState.ts`)
-
-```typescript
-import { getStateKey, setLastMessageTime, getLastMessageTimes } from './utils/conversationState';
-
-// Generate state tracking key (NOT the same as Message.conversation_key)
-getStateKey('channel', channelKey)
-getStateKey('contact', publicKey)
-
-// Track message times for sidebar sorting (stored in localStorage)
-setLastMessageTime(stateKey, timestamp)
-getLastMessageTimes()  // Returns all tracked message times
-```
-
-**Note:** Read state (`last_read_at`) is tracked server-side, not in localStorage.
-
-### Contact Avatar (`utils/contactAvatar.ts`)
-
-Generates consistent profile "images" for contacts using hash-based colors:
-
-```typescript
-import { getContactAvatar, CONTACT_TYPE_REPEATER } from './utils/contactAvatar';
-
-// Get avatar info for a contact
-const avatar = getContactAvatar(name, publicKey, contactType);
-// Returns: { text: 'JD', background: 'hsl(180, 60%, 40%)', textColor: '#ffffff' }
-
-// Repeaters (type=2) always show 🛜 with gray background
-const repeaterAvatar = getContactAvatar('Some Repeater', key, CONTACT_TYPE_REPEATER);
-// Returns: { text: '🛜', background: '#444444', textColor: '#ffffff' }
-```
-
-Avatar text priority:
-1. First emoji in name
-2. Initials (first letter + first letter after space)
-3. Single first letter
-4. First 2 chars of public key (fallback)
-
-## CSS Patterns
-
-The app uses a minimal dark theme in `styles.css`.
-
-### Key Classes
-
-```css
-.app             /* Root container */
-.status-bar      /* Top bar with radio info */
-.sidebar         /* Left panel with contacts/channels */
-.sidebar-item    /* Individual contact/channel row */
-.sidebar-item.unread  /* Bold with badge */
-.message-area    /* Main content area */
-.message-list    /* Scrollable message container */
-.message         /* Individual message */
-.message.outgoing    /* Right-aligned, different color */
-.message .sender     /* Clickable sender name */
-```
-
-### Unread Badge
-
-```css
-.sidebar-item.unread .name {
-  font-weight: 700;
-  color: #fff;
-}
-.sidebar-item .unread-badge {
-  background: #4caf50;
-  color: #fff;
-  font-size: 10px;
-  padding: 2px 6px;
-  border-radius: 10px;
-}
-```
-
-## Testing
-
-Run tests with:
-```bash
-cd frontend
-npm run test:run    # Single run
-npm run test        # Watch mode
-```
-
-### Test Files
-
-- `messageParser.test.ts` - Sender extraction, time formatting, conversation keys
-- `unreadCounts.test.ts` - Unread tracking logic
-- `contactAvatar.test.ts` - Avatar text extraction, color generation, repeater handling
-- `messageDeduplication.test.ts` - Message deduplication logic
-- `websocket.test.ts` - WebSocket message routing
-- `repeaterMode.test.ts` - Repeater CLI parsing, password "." conversion
-
-### Test Setup
-
-Tests use jsdom environment with `@testing-library/react`:
-
-```typescript
-// src/test/setup.ts
-import '@testing-library/jest-dom';
-```
-
-## Common Tasks
-
-### Adding a New Component
-
-1. Create component in `src/components/`
-2. Add TypeScript props interface
-3. Import and use in `App.tsx` or parent component
-4. Add styles to `styles.css`
-
-### Adding a New API Endpoint
-
-1. Add method to `api.ts`
-2. Add/update types in `types.ts`
-3. Call from `App.tsx` or component
-
-### Adding New WebSocket Event
-
-1. Add handler option to `UseWebSocketOptions` interface in `useWebSocket.ts`
-2. Add case to `onmessage` switch
-3. Provide handler in `wsHandlers` object in `App.tsx`
-
-### Adding State
-
-1. Add `useState` in `App.tsx`
-2. Pass down as props to components
-3. If needed in WebSocket handler, also use a ref to avoid stale closures
-
-## Development Workflow
-
-```bash
-# Start dev server (hot reload)
-npm run dev
-
-# Build for production
-npm run build
-
-# Preview production build
-npm run preview
-
-# Run tests
-npm run test:run
-```
-
-The dev server runs on port 5173 and proxies API requests to `localhost:8000`.
-
-### Production Build
-
-In production, the FastAPI backend serves the compiled frontend from `frontend/dist`:
-
-```bash
-npm run build
-# Then run backend: uv run uvicorn app.main:app --host 0.0.0.0 --port 8000
-```
-
-## URL Hash Navigation
-
-Deep linking to conversations via URL hash:
-
-- `#channel/RoomName` - Opens a channel (leading `#` stripped from name for cleaner URLs)
-- `#contact/ContactName` - Opens a DM
-- `#raw` - Opens the raw packet feed
-- `#map` - Opens the node map
-
-```typescript
-// Parse hash on initial load
-const hashConv = parseHashConversation();
-
-// Update hash when conversation changes (uses replaceState to avoid history pollution)
-window.history.replaceState(null, '', newHash);
-```
-
-## CrackerPanel
-
-The `CrackerPanel` component provides WebGPU-accelerated brute-forcing of channel keys for undecrypted GROUP_TEXT packets.
-
-### Features
-
-- **Dictionary attack first**: Uses `words.txt` wordlist
-- **GPU bruteforce**: Falls back to character-by-character search
-- **Queue management**: Automatically processes new packets as they arrive
-- **Auto-channel creation**: Cracked channels are automatically added to the channel list
-- **Configurable max length**: Adjustable while running (default: 6)
-- **Retry failed**: Option to retry failed packets at increasing lengths
-- **NoSleep integration**: Prevents device sleep during cracking via `nosleep.js`
-- **Global collapsible panel**: Toggle from sidebar, runs in background when hidden
-
-### Key Implementation Patterns
-
-Uses refs to avoid stale closures in async callbacks:
-
-```typescript
-const isRunningRef = useRef(false);
-const isProcessingRef = useRef(false);  // Prevents concurrent GPU operations
-const queueRef = useRef<Map<number, QueueItem>>(new Map());
-const retryFailedRef = useRef(false);
-const maxLengthRef = useRef(6);
-```
-
-Progress reporting shows rate in Mkeys/s or Gkeys/s depending on speed.
-
-## MapView
-
-The `MapView` component displays contacts with GPS coordinates on an interactive Leaflet map.
-
-### Features
-
-- **Location filtering**: Only shows contacts with lat/lon that were heard within the last 7 days
-- **Freshness coloring**: Markers colored by how recently the contact was heard:
-  - Bright green (`#22c55e`) - less than 1 hour ago
-  - Light green (`#4ade80`) - less than 1 day ago
-  - Yellow-green (`#a3e635`) - less than 3 days ago
-  - Gray (`#9ca3af`) - older (up to 7 days)
-- **Node/repeater distinction**: Regular nodes have black outlines, repeaters are larger with no outline
-- **Geolocation**: Tries browser geolocation first, falls back to fitting all markers in view
-- **Popups**: Click a marker to see contact name, last heard time, and coordinates
-
-### Data Source
-
-Contact location data (`lat`, `lon`) is extracted from advertisement packets in the backend (`decoder.py`).
-The `last_seen` timestamp determines marker freshness.
-
-## Sidebar Features
-
-- **Sort toggle**: Default is 'recent' (most recent message first), can toggle to alphabetical
-- **Mark all as read**: Button appears when there are unread messages, clears all unread counts
-- **Cracker toggle**: Shows/hides the global cracker panel with running status indicator
-
-## Toast Notifications
-
-The app uses Sonner for toast notifications via a custom wrapper at `components/ui/sonner.tsx`:
-
-```typescript
-import { toast } from './components/ui/sonner';
-
-// Success toast (use sparingly - only for significant/destructive actions)
-toast.success('Channel deleted');
-
-// Error toast with details
-toast.error('Failed to send message', {
-  description: err instanceof Error ? err.message : 'Check radio connection',
-});
-```
-
-### Error Handling Pattern
-
-All async operations that can fail should show error toasts. Keep console.error for debugging:
-
-```typescript
-try {
-  await api.someOperation();
-} catch (err) {
-  console.error('Failed to do X:', err);
-  toast.error('Failed to do X', {
-    description: err instanceof Error ? err.message : 'Check radio connection',
-  });
-}
-```
-
-### Where Toasts Are Used
-
-**Error toasts** (shown when operations fail):
-- `App.tsx`: Advertisement, channel delete, contact delete
-- `useConversationMessages.ts`: Message loading (initial and pagination)
-- `MessageInput.tsx`: Message send, telemetry request
-- `CrackerPanel.tsx`: Channel save after cracking, WebGPU unavailable
-- `StatusBar.tsx`: Manual reconnection failure
-- `useWebSocket.ts`: Backend errors via WebSocket `error` events
-
-**Success toasts** (used sparingly for significant actions):
-- Radio connection/disconnection status changes
-- Manual reconnection success
-- Advertisement sent, channel/contact deleted (confirmation of intentional actions)
-
-**Avoid success toasts** for routine operations like sending messages - only show errors.
-
-The `<Toaster />` component is rendered in `App.tsx` with `position="top-right"`.

frontend/dist/glyph.svg

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<svg width="700pt" height="700pt" version="1.1" viewBox="0 0 700 700" xmlns="http://www.w3.org/2000/svg">
- <path d="m405.89 352.77c0 30.797-25.02 55.762-55.887 55.762s-55.887-24.965-55.887-55.762c0-30.797 25.02-55.762 55.887-55.762s55.887 24.965 55.887 55.762z"/>
- <path d="m333.07 352.77h33.871v297.37h-33.871z"/>
- <path d="m412.71 495.07-13.648-30.926c44.27-19.438 72.879-63.152 72.879-111.37 0-67.082-54.699-121.65-121.94-121.65-67.242 0-121.94 54.57-121.94 121.65 0 48.215 28.609 91.93 72.879 111.37l-13.648 30.926c-56.547-24.844-93.094-80.695-93.094-142.3 0-85.715 69.887-155.44 155.8-155.44 85.918 0 155.8 69.727 155.8 155.44-0.003906 61.594-36.551 117.46-93.094 142.3z"/>
- <path d="m410.17 581.6-8.5742-32.691c89.277-23.309 151.63-103.96 151.63-196.15 0-111.8-91.168-202.75-203.22-202.75-112.06 0.003907-203.23 90.961-203.23 202.77 0 92.184 62.348 172.83 151.63 196.15l-8.5742 32.691c-104.18-27.195-176.93-121.3-176.93-228.83 0-130.43 106.36-236.54 237.1-236.54 130.73 0 237.1 106.12 237.1 236.54-0.003906 107.52-72.754 201.62-176.93 228.82z"/>
- <path d="m409.05 661.5-6.3125-33.199c132.34-25.047 228.39-140.93 228.39-275.53 0-154.66-126.12-280.48-281.13-280.48-155 0-281.13 125.82-281.13 280.48 0 134.6 96.055 250.48 228.39 275.53l-6.3164 33.199c-148.3-28.07-255.95-157.91-255.95-308.73 0-173.29 141.32-314.27 315-314.27s315 140.98 315 314.27c0 150.81-107.65 280.66-255.95 308.73z"/>
-</svg>

frontend/dist/index.html

@@ -1,22 +0,0 @@
-<!DOCTYPE html>
-<html lang="en" class="dark">
-  <head>
-    <meta charset="UTF-8" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0, viewport-fit=cover" />
-    <meta name="mobile-web-app-capable" content="yes" />
-    <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
-    <meta name="apple-mobile-web-app-title" content="MCTerm" />
-    <meta name="theme-color" content="#0a0a0a" />
-    <title>RemoteTerm for MeshCore</title>
-    <link rel="icon" type="image/png" href="/favicon-96x96.png" sizes="96x96" />
-    <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
-    <link rel="shortcut icon" href="/favicon.ico" />
-    <link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png" />
-    <link rel="manifest" href="/site.webmanifest" />
-    <script type="module" crossorigin src="/assets/index-CQVFPi-8.js"></script>
-    <link rel="stylesheet" crossorigin href="/assets/index-Bg6UtK9Z.css">
-  </head>
-  <body>
-    <div id="root"></div>
-  </body>
-</html>

frontend/dist/site.webmanifest

@@ -1,21 +0,0 @@
-{
-  "name": "RemoteTerm for MeshCore",
-  "short_name": "RemoteTerm",
-  "icons": [
-    {
-      "src": "/web-app-manifest-192x192.png",
-      "sizes": "192x192",
-      "type": "image/png",
-      "purpose": "maskable"
-    },
-    {
-      "src": "/web-app-manifest-512x512.png",
-      "sizes": "512x512",
-      "type": "image/png",
-      "purpose": "maskable"
-    }
-  ],
-  "theme_color": "#ffffff",
-  "background_color": "#ffffff",
-  "display": "standalone"
-}

frontend/index.html

@@ -6,13 +6,50 @@
     <meta name="mobile-web-app-capable" content="yes" />
     <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
     <meta name="apple-mobile-web-app-title" content="MCTerm" />
-    <meta name="theme-color" content="#0a0a0a" />
+    <meta name="theme-color" content="#111419" />
+    <meta name="description" content="Web interface for MeshCore mesh radio networks. Send and receive messages, manage contacts and channels, and configure your radio." />
     <title>RemoteTerm for MeshCore</title>
     <link rel="icon" type="image/png" href="/favicon-96x96.png" sizes="96x96" />
     <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
     <link rel="shortcut icon" href="/favicon.ico" />
     <link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png" />
     <link rel="manifest" href="/site.webmanifest" />
+    <script>
+      // Start critical data fetches before React/Vite JS loads.
+      // Must be in <head> BEFORE the module script so the browser queues these
+      // fetches before it discovers and starts downloading the JS bundle.
+      // React hooks consume the promises via window.__prefetch.
+      var fetchJsonOrThrow = function(url) {
+        return fetch(url).then(function(response) {
+          if (response.ok) {
+            return response.json();
+          }
+          return response.text().then(function(rawError) {
+            var message = rawError || response.statusText || ('HTTP ' + response.status);
+            try {
+              var parsed = JSON.parse(rawError);
+              if (parsed && typeof parsed.detail === 'string' && parsed.detail.length > 0) {
+                message = parsed.detail;
+              }
+            } catch {
+              // Keep raw text fallback when body is not JSON.
+            }
+            throw new Error('Prefetch failed for ' + url + ': ' + message);
+          });
+        }).catch(function(err) {
+          console.error(err);
+          throw err;
+        });
+      };
+      window.__prefetch = {
+        config: fetchJsonOrThrow('/api/radio/config'),
+        settings: fetchJsonOrThrow('/api/settings'),
+        channels: fetchJsonOrThrow('/api/channels'),
+        contacts: fetchJsonOrThrow('/api/contacts?limit=1000&offset=0'),
+        unreads: fetchJsonOrThrow('/api/read-state/unreads'),
+        undecryptedCount: fetchJsonOrThrow('/api/packets/undecrypted/count'),
+      };
+    </script>
   </head>
   <body>
     <div id="root"></div>

frontend/lib/meshcore-decoder/LICENSE.md

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 Michael Hart <michaelhart@michaelhart.me> (https://github.com/michaelhart)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

frontend/lib/meshcore-decoder/README.md

@@ -0,0 +1,453 @@
+# MeshCore Decoder
+
+A TypeScript library for decoding MeshCore mesh networking packets with full cryptographic support. Uses WebAssembly (WASM) for Ed25519 key derivation through the [orlp/ed25519 library](https://github.com/orlp/ed25519).
+
+This powers the [MeshCore Packet Analyzer](https://analyzer.letsme.sh/).
+
+## Features
+
+- **Packet Decoding**: Decode MeshCore packets
+- **Built-in Decryption**: Decrypt GroupText, TextMessage, and other encrypted payloads
+- **Developer Friendly**: TypeScript-first with full type safety and portability of JavaScript
+
+## Installation
+
+### Install to a single project
+
+```bash
+npm install @michaelhart/meshcore-decoder
+```
+
+### Install CLI (install globally)
+
+```bash
+npm install -g @michaelhart/meshcore-decoder
+```
+
+## Quick Start
+
+```typescript
+import { 
+  MeshCoreDecoder, 
+  PayloadType,
+  Utils,
+  DecodedPacket,
+  AdvertPayload 
+} from '@michaelhart/meshcore-decoder';
+
+// Decode a MeshCore packet
+const hexData: string = '11007E7662676F7F0850A8A355BAAFBFC1EB7B4174C340442D7D7161C9474A2C94006CE7CF682E58408DD8FCC51906ECA98EBF94A037886BDADE7ECD09FD92B839491DF3809C9454F5286D1D3370AC31A34593D569E9A042A3B41FD331DFFB7E18599CE1E60992A076D50238C5B8F85757375354522F50756765744D65736820436F75676172';
+
+const packet: DecodedPacket = MeshCoreDecoder.decode(hexData);
+
+console.log(`Route Type: ${Utils.getRouteTypeName(packet.routeType)}`);
+console.log(`Payload Type: ${Utils.getPayloadTypeName(packet.payloadType)}`);
+console.log(`Message Hash: ${packet.messageHash}`);
+
+if (packet.payloadType === PayloadType.Advert && packet.payload.decoded) {
+  const advert: AdvertPayload = packet.payload.decoded as AdvertPayload;
+  console.log(`Device Name: ${advert.appData.name}`);
+  console.log(`Device Role: ${Utils.getDeviceRoleName(advert.appData.deviceRole)}`);
+  if (advert.appData.location) {
+    console.log(`Location: ${advert.appData.location.latitude}, ${advert.appData.location.longitude}`);
+  }
+}
+```
+
+## Full Packet Structure Example
+
+Here's what a complete decoded packet looks like:
+
+```typescript
+import { MeshCoreDecoder, DecodedPacket } from '@michaelhart/meshcore-decoder';
+
+const hexData: string = '11007E7662676F7F0850A8A355BAAFBFC1EB7B4174C340442D7D7161C9474A2C94006CE7CF682E58408DD8FCC51906ECA98EBF94A037886BDADE7ECD09FD92B839491DF3809C9454F5286D1D3370AC31A34593D569E9A042A3B41FD331DFFB7E18599CE1E60992A076D50238C5B8F85757375354522F50756765744D65736820436F75676172';
+
+const packet: DecodedPacket = MeshCoreDecoder.decode(hexData);
+
+console.log(JSON.stringify(packet, null, 2));
+```
+
+**Output:**
+```json
+{
+  "messageHash": "F9C060FE",
+  "routeType": 1,
+  "payloadType": 4,
+  "payloadVersion": 0,
+  "pathLength": 0,
+  "path": null,
+  "payload": {
+    "raw": "7E7662676F7F0850A8A355BAAFBFC1EB7B4174C340442D7D7161C9474A2C94006CE7CF682E58408DD8FCC51906ECA98EBF94A037886BDADE7ECD09FD92B839491DF3809C9454F5286D1D3370AC31A34593D569E9A042A3B41FD331DFFB7E18599CE1E60992A076D50238C5B8F85757375354522F50756765744D65736820436F75676172",
+    "decoded": {
+      "type": 4,
+      "version": 0,
+      "isValid": true,
+      "publicKey": "7E7662676F7F0850A8A355BAAFBFC1EB7B4174C340442D7D7161C9474A2C9400",
+      "timestamp": 1758455660,
+      "signature": "2E58408DD8FCC51906ECA98EBF94A037886BDADE7ECD09FD92B839491DF3809C9454F5286D1D3370AC31A34593D569E9A042A3B41FD331DFFB7E18599CE1E609",
+      "appData": {
+        "flags": 146,
+        "deviceRole": 2,
+        "hasLocation": true,
+        "hasName": true,
+        "location": {
+          "latitude": 47.543968,
+          "longitude": -122.108616
+        },
+        "name": "WW7STR/PugetMesh Cougar"
+      }
+    }
+  },
+  "totalBytes": 134,
+  "isValid": true
+}
+```
+
+## Packet Support
+
+| Value | Name | Description | Decoding | Decryption | Segment Analysis |
+|-------|------|-------------|----------|------------|------------------|
+| `0x00` | Request | Request (destination/source hashes + MAC) | ✅ | 🚧 | ✅ |
+| `0x01` | Response | Response to REQ or ANON_REQ | ✅ | 🚧 | ✅ |
+| `0x02` | Plain text message | Plain text message | ✅ | 🚧 | ✅ |
+| `0x03` | Acknowledgment | Acknowledgment | ✅ | N/A | ✅ |
+| `0x04` | Node advertisement | Node advertisement | ✅ | N/A | ✅ |
+| `0x05` | Group text message | Group text message | ✅ | ✅ | ✅ |
+| `0x06` | Group datagram | Group datagram | 🚧 | 🚧 | 🚧 |
+| `0x07` | Anonymous request | Anonymous request | ✅ | 🚧 | ✅ |
+| `0x08` | Returned path | Returned path | ✅ | N/A | ✅ |
+| `0x09` | Trace | Trace a path, collecting SNI for each hop | ✅ | N/A | ✅ |
+| `0x0A` | Multi-part packet | Packet is part of a sequence of packets | 🚧 | 🚧 | 🚧 |
+| `0x0F` | Custom packet | Custom packet (raw bytes, custom encryption) | 🚧 | 🚧 | 🚧 |
+
+**Legend:**
+- ✅ Fully implemented
+- 🚧 Planned/In development
+- `-` Not applicable
+
+For some packet types not yet supported here, they may not exist in MeshCore yet or I have yet to observe these packet types on the mesh.
+
+## Decryption Support
+
+Simply provide your channel secret keys and the library handles everything else:
+
+```typescript
+import { 
+  MeshCoreDecoder, 
+  PayloadType,
+  CryptoKeyStore,
+  DecodedPacket,
+  GroupTextPayload 
+} from '@michaelhart/meshcore-decoder';
+
+// Create a key store with channel secret keys
+const keyStore: CryptoKeyStore = MeshCoreDecoder.createKeyStore({
+  channelSecrets: [
+    '8b3387e9c5cdea6ac9e5edbaa115cd72', // Public channel (channel hash 11)
+    'ff2b7d74e8d20f71505bda9ea8d59a1c', // A different channel's secret
+  ]
+});
+
+const groupTextHexData: string = '...'; // Your encrypted GroupText packet hex
+
+// Decode encrypted GroupText message
+const encryptedPacket: DecodedPacket = MeshCoreDecoder.decode(groupTextHexData, { keyStore });
+
+if (encryptedPacket.payloadType === PayloadType.GroupText && encryptedPacket.payload.decoded) {
+  const groupText: GroupTextPayload = encryptedPacket.payload.decoded as GroupTextPayload;
+  
+  if (groupText.decrypted) {
+    console.log(`Sender: ${groupText.decrypted.sender}`);
+    console.log(`Message: ${groupText.decrypted.message}`);
+    console.log(`Timestamp: ${new Date(groupText.decrypted.timestamp * 1000).toISOString()}`);
+  } else {
+    console.log('Message encrypted (no key available)');
+  }
+}
+```
+
+The library automatically:
+- Calculates channel hashes from your secret keys using SHA256
+- Handles hash collisions (multiple keys with same first byte) by trying all matching keys
+- Verifies message authenticity using HMAC-SHA256
+- Decrypts using AES-128 ECB
+
+## Packet Structure Analysis
+
+For detailed packet analysis and debugging, use `analyzeStructure()` to get byte-level breakdowns:
+
+```typescript
+import { MeshCoreDecoder, PacketStructure } from '@michaelhart/meshcore-decoder';
+
+console.log('=== Packet Breakdown ===');
+const hexData: string = '11007E7662676F7F0850A8A355BAAFBFC1EB7B4174C340442D7D7161C9474A2C94006CE7CF682E58408DD8FCC51906ECA98EBF94A037886BDADE7ECD09FD92B839491DF3809C9454F5286D1D3370AC31A34593D569E9A042A3B41FD331DFFB7E18599CE1E60992A076D50238C5B8F85757375354522F50756765744D65736820436F75676172';
+
+console.log('Packet length:', hexData.length);
+console.log('Expected bytes:', hexData.length / 2);
+
+const structure: PacketStructure = MeshCoreDecoder.analyzeStructure(hexData);
+console.log('\nMain segments:');
+structure.segments.forEach((seg, i) => {
+  console.log(`${i+1}. ${seg.name} (bytes ${seg.startByte}-${seg.endByte}): ${seg.value}`);
+});
+
+console.log('\nPayload segments:');
+structure.payload.segments.forEach((seg, i) => {
+  console.log(`${i+1}. ${seg.name} (bytes ${seg.startByte}-${seg.endByte}): ${seg.value}`);
+  console.log(`   Description: ${seg.description}`);
+});
+```
+
+**Output:**
+```
+=== Packet Breakdown ===
+Packet length: 268
+Expected bytes: 134
+
+Main segments:
+1. Header (bytes 0-0): 0x11
+2. Path Length (bytes 1-1): 0x00
+3. Payload (bytes 2-133): 7E7662676F7F0850A8A355BAAFBFC1EB7B4174C340442D7D7161C9474A2C94006CE7CF682E58408DD8FCC51906ECA98EBF94A037886BDADE7ECD09FD92B839491DF3809C9454F5286D1D3370AC31A34593D569E9A042A3B41FD331DFFB7E18599CE1E60992A076D50238C5B8F85757375354522F50756765744D65736820436F75676172
+
+Payload segments:
+1. Public Key (bytes 0-31): 7E7662676F7F0850A8A355BAAFBFC1EB7B4174C340442D7D7161C9474A2C9400
+   Description: Ed25519 public key
+2. Timestamp (bytes 32-35): 6CE7CF68
+   Description: 1758455660 (2025-09-21T11:54:20Z)
+3. Signature (bytes 36-99): 2E58408DD8FCC51906ECA98EBF94A037886BDADE7ECD09FD92B839491DF3809C9454F5286D1D3370AC31A34593D569E9A042A3B41FD331DFFB7E18599CE1E609
+   Description: Ed25519 signature
+4. App Flags (bytes 100-100): 92
+   Description: Binary: 10010010 | Bits 0-3 (Role): Room server | Bit 4 (Location): Yes | Bit 5 (Feature1): No | Bit 6 (Feature2): No | Bit 7 (Name): Yes
+5. Latitude (bytes 101-104): A076D502
+   Description: 47.543968° (47.543968)
+6. Longitude (bytes 105-108): 38C5B8F8
+   Description: -122.108616° (-122.108616)
+7. Node Name (bytes 109-131): 5757375354522F50756765744D65736820436F75676172
+   Description: Node name: "WW7STR/PugetMesh Cougar"
+```
+
+The `analyzeStructure()` method provides:
+- **Header breakdown** with bit-level field analysis
+- **Byte-accurate segments** with start/end positions
+- **Payload field parsing** for all supported packet types
+- **Human-readable descriptions** for each field
+
+## Ed25519 Key Derivation
+
+The library includes MeshCore-compatible Ed25519 key derivation using the exact orlp/ed25519 algorithm via WebAssembly:
+
+```typescript
+import { Utils } from '@michaelhart/meshcore-decoder';
+
+// Derive public key from MeshCore private key (64-byte format)
+const privateKey = '18469d6140447f77de13cd8d761e605431f52269fbff43b0925752ed9e6745435dc6a86d2568af8b70d3365db3f88234760c8ecc645ce469829bc45b65f1d5d5';
+
+const publicKey = await Utils.derivePublicKey(privateKey);
+console.log('Derived Public Key:', publicKey);
+// Output: 4852B69364572B52EFA1B6BB3E6D0ABED4F389A1CBFBB60A9BBA2CCE649CAF0E
+
+// Validate a key pair
+const isValid = await Utils.validateKeyPair(privateKey, publicKey);
+console.log('Key pair valid:', isValid); // true
+```
+
+### Command Line Interface
+
+For quick analysis from the terminal, install globally and use the CLI:
+
+```bash
+# Install globally
+npm install -g @michaelhart/meshcore-decoder
+
+# Analyze a packet
+meshcore-decoder 11007E7662676F7F0850A8A355BAAFBFC1EB7B4174C340442D7D7161C9474A2C94006CE7CF682E58408DD8FCC51906ECA98EBF94A037886BDADE7ECD09FD92B839491DF3809C9454F5286D1D3370AC31A34593D569E9A042A3B41FD331DFFB7E18599CE1E60992A076D50238C5B8F85757375354522F50756765744D65736820436F75676172
+
+# With decryption (provide channel secrets)
+meshcore-decoder 150011C3C1354D619BAE9590E4D177DB7EEAF982F5BDCF78005D75157D9535FA90178F785D --key 8b3387e9c5cdea6ac9e5edbaa115cd72
+
+# Show detailed structure analysis
+meshcore-decoder --structure 11007E7662676F7F0850A8A355BAAFBFC1EB7B4174C340442D7D7161C9474A2C94006CE7CF682E58408DD8FCC51906ECA98EBF94A037886BDADE7ECD09FD92B839491DF3809C9454F5286D1D3370AC31A34593D569E9A042A3B41FD331DFFB7E18599CE1E60992A076D50238C5B8F85757375354522F50756765744D65736820436F75676172
+
+# JSON output
+meshcore-decoder --json 11007E7662676F7F0850A8A355BAAFBFC1EB7B4174C340442D7D7161C9474A2C94006CE7CF682E58408DD8FCC51906ECA98EBF94A037886BDADE7ECD09FD92B839491DF3809C9454F5286D1D3370AC31A34593D569E9A042A3B41FD331DFFB7E18599CE1E60992A076D50238C5B8F85757375354522F50756765744D65736820436F75676172
+
+# Derive public key from MeshCore private key
+meshcore-decoder derive-key 18469d6140447f77de13cd8d761e605431f52269fbff43b0925752ed9e6745435dc6a86d2568af8b70d3365db3f88234760c8ecc645ce469829bc45b65f1d5d5
+
+# Validate key pair
+meshcore-decoder derive-key 18469d6140447f77de13cd8d761e605431f52269fbff43b0925752ed9e6745435dc6a86d2568af8b70d3365db3f88234760c8ecc645ce469829bc45b65f1d5d5 --validate 4852b69364572b52efa1b6bb3e6d0abed4f389a1cbfbb60a9bba2cce649caf0e
+
+# Key derivation with JSON output
+meshcore-decoder derive-key 18469d6140447f77de13cd8d761e605431f52269fbff43b0925752ed9e6745435dc6a86d2568af8b70d3365db3f88234760c8ecc645ce469829bc45b65f1d5d5 --json
+```
+
+
+## Using with Angular
+
+The library works in Angular (and other browser-based) applications but requires additional configuration for WASM support and browser compatibility.
+
+### 1. Configure Assets in `angular.json`
+
+Add the WASM files to your Angular assets configuration:
+
+```json
+{
+  "projects": {
+    "your-app": {
+      "architect": {
+        "build": {
+          "options": {
+            "assets": [
+              // ... your existing assets ...
+              {
+                "glob": "orlp-ed25519.*",
+                "input": "./node_modules/@michaelhart/meshcore-decoder/lib",
+                "output": "assets/"
+              }
+            ]
+          }
+        }
+      }
+    }
+  }
+}
+```
+
+### 2. Create a WASM Service
+
+Create `src/app/services/meshcore-wasm.ts`:
+
+```typescript
+import { Injectable } from '@angular/core';
+import { BehaviorSubject } from 'rxjs';
+
+@Injectable({ providedIn: 'root' })
+export class MeshCoreWasmService {
+  private wasm: any = null;
+  public ready = new BehaviorSubject<boolean>(false);
+
+  constructor() {
+    this.loadWasm();
+  }
+
+  private async loadWasm() {
+    try {
+      const jsResponse = await fetch('/assets/orlp-ed25519.js');
+      const jsText = await jsResponse.text();
+      
+      const script = document.createElement('script');
+      script.textContent = jsText;
+      document.head.appendChild(script);
+      
+      this.wasm = await (window as any).OrlpEd25519({
+        locateFile: (path: string) => path === 'orlp-ed25519.wasm' ? '/assets/orlp-ed25519.wasm' : path
+      });
+      
+      this.ready.next(true);
+    } catch (error) {
+      console.error('WASM load failed:', error);
+      this.ready.next(false);
+    }
+  }
+
+  derivePublicKey(privateKeyHex: string): string | null {
+    if (!this.wasm) return null;
+    
+    const privateKeyBytes = this.hexToBytes(privateKeyHex);
+    const privateKeyPtr = 1024;
+    const publicKeyPtr = 1088;
+    
+    this.wasm.HEAPU8.set(privateKeyBytes, privateKeyPtr);
+    
+    const result = this.wasm.ccall('orlp_derive_public_key', 'number', ['number', 'number'], [publicKeyPtr, privateKeyPtr]);
+    
+    if (result === 0) {
+      const publicKeyBytes = this.wasm.HEAPU8.subarray(publicKeyPtr, publicKeyPtr + 32);
+      return this.bytesToHex(publicKeyBytes);
+    }
+    
+    return null;
+  }
+
+  private hexToBytes(hex: string): Uint8Array {
+    const bytes = new Uint8Array(hex.length / 2);
+    for (let i = 0; i < hex.length; i += 2) {
+      bytes[i / 2] = parseInt(hex.substr(i, 2), 16);
+    }
+    return bytes;
+  }
+
+  private bytesToHex(bytes: Uint8Array): string {
+    return Array.from(bytes).map(b => b.toString(16).padStart(2, '0')).join('').toUpperCase();
+  }
+}
+```
+
+### 3. Basic Usage
+
+```typescript
+import { MeshCorePacketDecoder } from '@michaelhart/meshcore-decoder';
+import { MeshCoreWasmService } from './services/meshcore-wasm';
+
+// Basic packet decoding (works immediately)
+const packet = MeshCorePacketDecoder.decode(hexData);
+
+// Key derivation (wait for WASM)
+wasmService.ready.subscribe(isReady => {
+  if (isReady) {
+    const publicKey = wasmService.derivePublicKey(privateKeyHex);
+  }
+});
+```
+
+### Angular/Browser: Important Notes
+
+- **WASM Loading**: The library uses WebAssembly for Ed25519 key derivation. This requires proper asset configuration and a service to handle async WASM loading.
+- **Browser Compatibility**: The library automatically detects the environment and uses Web Crypto API in browsers, Node.js crypto in Node.js.
+- **Async Operations**: Key derivation is async due to WASM loading. Always wait for the `WasmService.ready` observable.
+- **Error Handling**: WASM operations may fail in some environments. Always wrap in try-catch blocks.
+
+
+## Development
+
+```bash
+# Install dependencies
+npm install
+
+# Run tests
+npm test
+
+# Run tests in watch mode
+npm run test:watch
+
+# Build for production
+npm run build
+
+# Development with ts-node
+npm run dev
+```
+
+## License
+
+MIT License
+
+Copyright (c) 2025 Michael Hart <michaelhart@michaelhart.me> (https://github.com/michaelhart)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

frontend/lib/meshcore-decoder/dist/cli.d.ts

@@ -0,0 +1,3 @@
+#!/usr/bin/env node
+export {};
+//# sourceMappingURL=cli.d.ts.map

frontend/lib/meshcore-decoder/dist/cli.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"cli.d.ts","sourceRoot":"","sources":["../src/cli.ts"],"names":[],"mappings":""}

frontend/lib/meshcore-decoder/dist/cli.js

@@ -0,0 +1,409 @@
+#!/usr/bin/env node
+"use strict";
+var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    var desc = Object.getOwnPropertyDescriptor(m, k);
+    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
+      desc = { enumerable: true, get: function() { return m[k]; } };
+    }
+    Object.defineProperty(o, k2, desc);
+}) : (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    o[k2] = m[k];
+}));
+var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
+    Object.defineProperty(o, "default", { enumerable: true, value: v });
+}) : function(o, v) {
+    o["default"] = v;
+});
+var __importStar = (this && this.__importStar) || (function () {
+    var ownKeys = function(o) {
+        ownKeys = Object.getOwnPropertyNames || function (o) {
+            var ar = [];
+            for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
+            return ar;
+        };
+        return ownKeys(o);
+    };
+    return function (mod) {
+        if (mod && mod.__esModule) return mod;
+        var result = {};
+        if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
+        __setModuleDefault(result, mod);
+        return result;
+    };
+})();
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+const packet_decoder_1 = require("./decoder/packet-decoder");
+const enums_1 = require("./types/enums");
+const enum_names_1 = require("./utils/enum-names");
+const index_1 = require("./index");
+const commander_1 = require("commander");
+const chalk_1 = __importDefault(require("chalk"));
+const packageJson = __importStar(require("../package.json"));
+commander_1.program
+    .name('meshcore-decoder')
+    .description('CLI tool for decoding MeshCore packets')
+    .version(packageJson.version);
+// Default decode command
+commander_1.program
+    .command('decode', { isDefault: true })
+    .description('Decode a MeshCore packet')
+    .argument('<hex>', 'Hex string of the packet to decode')
+    .option('-k, --key <keys...>', 'Channel secret keys for decryption (hex)')
+    .option('-j, --json', 'Output as JSON instead of formatted text')
+    .option('-s, --structure', 'Show detailed packet structure analysis')
+    .action(async (hex, options) => {
+    try {
+        // Clean up hex input
+        const cleanHex = hex.replace(/\s+/g, '').replace(/^0x/i, '');
+        // Create key store if keys provided
+        let keyStore;
+        if (options.key && options.key.length > 0) {
+            keyStore = packet_decoder_1.MeshCorePacketDecoder.createKeyStore({
+                channelSecrets: options.key
+            });
+        }
+        // Decode packet with signature verification
+        const packet = await packet_decoder_1.MeshCorePacketDecoder.decodeWithVerification(cleanHex, { keyStore });
+        if (options.json) {
+            // JSON output
+            if (options.structure) {
+                const structure = await packet_decoder_1.MeshCorePacketDecoder.analyzeStructureWithVerification(cleanHex, { keyStore });
+                console.log(JSON.stringify({ packet, structure }, null, 2));
+            }
+            else {
+                console.log(JSON.stringify(packet, null, 2));
+            }
+        }
+        else {
+            // Formatted output
+            console.log(chalk_1.default.cyan('=== MeshCore Packet Analysis ===\n'));
+            if (!packet.isValid) {
+                console.log(chalk_1.default.red('❌ Invalid Packet'));
+                if (packet.errors) {
+                    packet.errors.forEach(error => console.log(chalk_1.default.red(`   ${error}`)));
+                }
+            }
+            else {
+                console.log(chalk_1.default.green('✅ Valid Packet'));
+            }
+            console.log(`${chalk_1.default.bold('Message Hash:')} ${packet.messageHash}`);
+            console.log(`${chalk_1.default.bold('Route Type:')} ${(0, enum_names_1.getRouteTypeName)(packet.routeType)}`);
+            console.log(`${chalk_1.default.bold('Payload Type:')} ${(0, enum_names_1.getPayloadTypeName)(packet.payloadType)}`);
+            console.log(`${chalk_1.default.bold('Total Bytes:')} ${packet.totalBytes}`);
+            if (packet.path && packet.path.length > 0) {
+                console.log(`${chalk_1.default.bold('Path:')} ${packet.path.join(' → ')}`);
+            }
+            // Show payload details (even for invalid packets)
+            if (packet.payload.decoded) {
+                console.log(chalk_1.default.cyan('\n=== Payload Details ==='));
+                showPayloadDetails(packet.payload.decoded);
+            }
+            // Exit with error code if packet is invalid
+            if (!packet.isValid) {
+                process.exit(1);
+            }
+            // Show structure if requested
+            if (options.structure) {
+                const structure = await packet_decoder_1.MeshCorePacketDecoder.analyzeStructureWithVerification(cleanHex, { keyStore });
+                console.log(chalk_1.default.cyan('\n=== Packet Structure ==='));
+                console.log(chalk_1.default.yellow('\nMain Segments:'));
+                structure.segments.forEach((seg, i) => {
+                    console.log(`${i + 1}. ${chalk_1.default.bold(seg.name)} (bytes ${seg.startByte}-${seg.endByte}): ${seg.value}`);
+                    if (seg.description) {
+                        console.log(`   ${chalk_1.default.dim(seg.description)}`);
+                    }
+                });
+                if (structure.payload.segments.length > 0) {
+                    console.log(chalk_1.default.yellow('\nPayload Segments:'));
+                    structure.payload.segments.forEach((seg, i) => {
+                        console.log(`${i + 1}. ${chalk_1.default.bold(seg.name)} (bytes ${seg.startByte}-${seg.endByte}): ${seg.value}`);
+                        console.log(`   ${chalk_1.default.dim(seg.description)}`);
+                    });
+                }
+            }
+        }
+    }
+    catch (error) {
+        console.error(chalk_1.default.red('Error:'), error.message);
+        process.exit(1);
+    }
+});
+function showPayloadDetails(payload) {
+    switch (payload.type) {
+        case enums_1.PayloadType.Advert:
+            const advert = payload;
+            console.log(`${chalk_1.default.bold('Device Role:')} ${(0, enum_names_1.getDeviceRoleName)(advert.appData.deviceRole)}`);
+            if (advert.appData.name) {
+                console.log(`${chalk_1.default.bold('Device Name:')} ${advert.appData.name}`);
+            }
+            if (advert.appData.location) {
+                console.log(`${chalk_1.default.bold('Location:')} ${advert.appData.location.latitude}, ${advert.appData.location.longitude}`);
+            }
+            console.log(`${chalk_1.default.bold('Timestamp:')} ${new Date(advert.timestamp * 1000).toISOString()}`);
+            // Show signature verification status
+            if (advert.signatureValid !== undefined) {
+                if (advert.signatureValid) {
+                    console.log(`${chalk_1.default.bold('Signature:')} ${chalk_1.default.green('✅ Valid Ed25519 signature')}`);
+                }
+                else {
+                    console.log(`${chalk_1.default.bold('Signature:')} ${chalk_1.default.red('❌ Invalid Ed25519 signature')}`);
+                    if (advert.signatureError) {
+                        console.log(`${chalk_1.default.bold('Error:')} ${chalk_1.default.red(advert.signatureError)}`);
+                    }
+                }
+            }
+            else {
+                console.log(`${chalk_1.default.bold('Signature:')} ${chalk_1.default.yellow('⚠️ Not verified (use async verification)')}`);
+            }
+            break;
+        case enums_1.PayloadType.GroupText:
+            const groupText = payload;
+            console.log(`${chalk_1.default.bold('Channel Hash:')} ${groupText.channelHash}`);
+            if (groupText.decrypted) {
+                console.log(chalk_1.default.green('🔓 Decrypted Message:'));
+                if (groupText.decrypted.sender) {
+                    console.log(`${chalk_1.default.bold('Sender:')} ${groupText.decrypted.sender}`);
+                }
+                console.log(`${chalk_1.default.bold('Message:')} ${groupText.decrypted.message}`);
+                console.log(`${chalk_1.default.bold('Timestamp:')} ${new Date(groupText.decrypted.timestamp * 1000).toISOString()}`);
+            }
+            else {
+                console.log(chalk_1.default.yellow('🔒 Encrypted (no key available)'));
+                console.log(`${chalk_1.default.bold('Ciphertext:')} ${groupText.ciphertext.substring(0, 32)}...`);
+            }
+            break;
+        case enums_1.PayloadType.Trace:
+            const trace = payload;
+            console.log(`${chalk_1.default.bold('Trace Tag:')} ${trace.traceTag}`);
+            console.log(`${chalk_1.default.bold('Auth Code:')} ${trace.authCode}`);
+            if (trace.snrValues && trace.snrValues.length > 0) {
+                console.log(`${chalk_1.default.bold('SNR Values:')} ${trace.snrValues.map(snr => `${snr.toFixed(1)}dB`).join(', ')}`);
+            }
+            break;
+        default:
+            console.log(`${chalk_1.default.bold('Type:')} ${(0, enum_names_1.getPayloadTypeName)(payload.type)}`);
+            console.log(`${chalk_1.default.bold('Valid:')} ${payload.isValid ? '✅' : '❌'}`);
+    }
+}
+// Add key derivation command
+commander_1.program
+    .command('derive-key')
+    .description('Derive Ed25519 public key from MeshCore private key')
+    .argument('<private-key>', '64-byte private key in hex format')
+    .option('-v, --validate <public-key>', 'Validate against expected public key')
+    .option('-j, --json', 'Output as JSON')
+    .action(async (privateKeyHex, options) => {
+    try {
+        // Clean up hex input
+        const cleanPrivateKey = privateKeyHex.replace(/\s+/g, '').replace(/^0x/i, '');
+        if (cleanPrivateKey.length !== 128) {
+            console.error(chalk_1.default.red('❌ Error: Private key must be exactly 64 bytes (128 hex characters)'));
+            process.exit(1);
+        }
+        if (options.json) {
+            // JSON output
+            const result = {
+                privateKey: cleanPrivateKey,
+                derivedPublicKey: await index_1.Utils.derivePublicKey(cleanPrivateKey)
+            };
+            if (options.validate) {
+                const cleanExpectedKey = options.validate.replace(/\s+/g, '').replace(/^0x/i, '');
+                result.expectedPublicKey = cleanExpectedKey;
+                result.isValid = await index_1.Utils.validateKeyPair(cleanPrivateKey, cleanExpectedKey);
+                result.match = result.derivedPublicKey.toLowerCase() === cleanExpectedKey.toLowerCase();
+            }
+            console.log(JSON.stringify(result, null, 2));
+        }
+        else {
+            // Formatted output
+            console.log(chalk_1.default.cyan('=== MeshCore Ed25519 Key Derivation ===\n'));
+            console.log(chalk_1.default.bold('Private Key (64 bytes):'));
+            console.log(chalk_1.default.gray(cleanPrivateKey));
+            console.log();
+            console.log(chalk_1.default.bold('Derived Public Key (32 bytes):'));
+            const derivedKey = await index_1.Utils.derivePublicKey(cleanPrivateKey);
+            console.log(chalk_1.default.green(derivedKey));
+            console.log();
+            if (options.validate) {
+                const cleanExpectedKey = options.validate.replace(/\s+/g, '').replace(/^0x/i, '');
+                console.log(chalk_1.default.bold('Expected Public Key:'));
+                console.log(chalk_1.default.gray(cleanExpectedKey));
+                console.log();
+                const match = derivedKey.toLowerCase() === cleanExpectedKey.toLowerCase();
+                console.log(chalk_1.default.bold('Validation:'));
+                console.log(match ? chalk_1.default.green('Keys match') : chalk_1.default.red('Keys do not match'));
+                if (!match) {
+                    process.exit(1);
+                }
+            }
+            console.log(chalk_1.default.green('Key derivation completed successfully'));
+        }
+    }
+    catch (error) {
+        const errorMessage = error instanceof Error ? error.message : 'Unknown error';
+        if (options.json) {
+            console.log(JSON.stringify({ error: errorMessage }, null, 2));
+        }
+        else {
+            console.error(chalk_1.default.red(`Error: ${errorMessage}`));
+        }
+        process.exit(1);
+    }
+});
+// Add auth-token command
+commander_1.program
+    .command('auth-token')
+    .description('Generate JWT authentication token signed with Ed25519 private key')
+    .argument('<public-key>', '32-byte public key in hex format')
+    .argument('<private-key>', '64-byte private key in hex format')
+    .option('-e, --exp <seconds>', 'Token expiration in seconds from now (default: 86400 = 24 hours)', '86400')
+    .option('-c, --claims <json>', 'Additional claims as JSON object (e.g., \'{"aud":"mqtt.example.com","sub":"device-123"}\')')
+    .option('-j, --json', 'Output as JSON')
+    .action(async (publicKeyHex, privateKeyHex, options) => {
+    try {
+        const { createAuthToken } = await Promise.resolve().then(() => __importStar(require('./utils/auth-token')));
+        // Clean up hex inputs
+        const cleanPublicKey = publicKeyHex.replace(/\s+/g, '').replace(/^0x/i, '');
+        const cleanPrivateKey = privateKeyHex.replace(/\s+/g, '').replace(/^0x/i, '');
+        if (cleanPublicKey.length !== 64) {
+            console.error(chalk_1.default.red('❌ Error: Public key must be exactly 32 bytes (64 hex characters)'));
+            process.exit(1);
+        }
+        if (cleanPrivateKey.length !== 128) {
+            console.error(chalk_1.default.red('❌ Error: Private key must be exactly 64 bytes (128 hex characters)'));
+            process.exit(1);
+        }
+        const expSeconds = parseInt(options.exp);
+        const iat = Math.floor(Date.now() / 1000);
+        const exp = iat + expSeconds;
+        const payload = {
+            publicKey: cleanPublicKey.toUpperCase(),
+            iat,
+            exp
+        };
+        // Parse and merge additional claims if provided
+        if (options.claims) {
+            try {
+                const additionalClaims = JSON.parse(options.claims);
+                Object.assign(payload, additionalClaims);
+            }
+            catch (e) {
+                console.error(chalk_1.default.red('❌ Error: Invalid JSON in --claims option'));
+                process.exit(1);
+            }
+        }
+        const token = await createAuthToken(payload, cleanPrivateKey, cleanPublicKey.toUpperCase());
+        if (options.json) {
+            console.log(JSON.stringify({
+                token,
+                payload
+            }, null, 2));
+        }
+        else {
+            console.log(token);
+        }
+    }
+    catch (error) {
+        const errorMessage = error instanceof Error ? error.message : 'Unknown error';
+        if (options.json) {
+            console.log(JSON.stringify({ error: errorMessage }, null, 2));
+        }
+        else {
+            console.error(chalk_1.default.red(`Error: ${errorMessage}`));
+        }
+        process.exit(1);
+    }
+});
+// Add verify-token command
+commander_1.program
+    .command('verify-token')
+    .description('Verify JWT authentication token')
+    .argument('<token>', 'JWT token to verify')
+    .option('-p, --public-key <key>', 'Expected public key in hex format (optional)')
+    .option('-j, --json', 'Output as JSON')
+    .action(async (token, options) => {
+    try {
+        const { verifyAuthToken } = await Promise.resolve().then(() => __importStar(require('./utils/auth-token')));
+        const cleanToken = token.trim();
+        let expectedPublicKey;
+        if (options.publicKey) {
+            const cleanKey = options.publicKey.replace(/\s+/g, '').replace(/^0x/i, '').toUpperCase();
+            if (cleanKey.length !== 64) {
+                console.error(chalk_1.default.red('❌ Error: Public key must be exactly 32 bytes (64 hex characters)'));
+                process.exit(1);
+            }
+            expectedPublicKey = cleanKey;
+        }
+        const payload = await verifyAuthToken(cleanToken, expectedPublicKey);
+        if (payload) {
+            const now = Math.floor(Date.now() / 1000);
+            const isExpired = payload.exp && now > payload.exp;
+            const timeToExpiry = payload.exp ? payload.exp - now : null;
+            if (options.json) {
+                console.log(JSON.stringify({
+                    valid: true,
+                    expired: isExpired,
+                    payload,
+                    timeToExpiry
+                }, null, 2));
+            }
+            else {
+                console.log(chalk_1.default.green('✅ Token is valid'));
+                console.log(chalk_1.default.cyan('\nPayload:'));
+                console.log(`  Public Key: ${payload.publicKey}`);
+                console.log(`  Issued At:  ${new Date(payload.iat * 1000).toISOString()} (${payload.iat})`);
+                if (payload.exp) {
+                    console.log(`  Expires At: ${new Date(payload.exp * 1000).toISOString()} (${payload.exp})`);
+                    if (isExpired) {
+                        console.log(chalk_1.default.red(`  Status:     EXPIRED`));
+                    }
+                    else {
+                        console.log(chalk_1.default.green(`  Status:     Valid for ${timeToExpiry} more seconds`));
+                    }
+                }
+                // Show any additional claims
+                const standardClaims = ['publicKey', 'iat', 'exp'];
+                const customClaims = Object.keys(payload).filter(k => !standardClaims.includes(k));
+                if (customClaims.length > 0) {
+                    console.log(chalk_1.default.cyan('\nCustom Claims:'));
+                    customClaims.forEach(key => {
+                        console.log(`  ${key}: ${JSON.stringify(payload[key])}`);
+                    });
+                }
+            }
+        }
+        else {
+            if (options.json) {
+                console.log(JSON.stringify({
+                    valid: false,
+                    error: 'Token verification failed'
+                }, null, 2));
+            }
+            else {
+                console.error(chalk_1.default.red('❌ Token verification failed'));
+                console.error(chalk_1.default.yellow('Possible reasons:'));
+                console.error('  - Invalid signature');
+                console.error('  - Token format is incorrect');
+                console.error('  - Public key mismatch (if --public-key was provided)');
+            }
+            process.exit(1);
+        }
+    }
+    catch (error) {
+        const errorMessage = error instanceof Error ? error.message : 'Unknown error';
+        if (options.json) {
+            console.log(JSON.stringify({ valid: false, error: errorMessage }, null, 2));
+        }
+        else {
+            console.error(chalk_1.default.red(`Error: ${errorMessage}`));
+        }
+        process.exit(1);
+    }
+});
+commander_1.program.parse();
+//# sourceMappingURL=cli.js.map

frontend/lib/meshcore-decoder/dist/crypto/channel-crypto.d.ts

@@ -0,0 +1,15 @@
+import { DecryptionResult } from '../types/crypto';
+export declare class ChannelCrypto {
+    /**
+     * Decrypt GroupText message using MeshCore algorithm:
+     * - HMAC-SHA256 verification with 2-byte MAC
+     * - AES-128 ECB decryption
+     */
+    static decryptGroupTextMessage(ciphertext: string, cipherMac: string, channelKey: string): DecryptionResult;
+    /**
+     * Calculate MeshCore channel hash from secret key
+     * Returns the first byte of SHA256(secret) as hex string
+     */
+    static calculateChannelHash(secretKeyHex: string): string;
+}
+//# sourceMappingURL=channel-crypto.d.ts.map

frontend/lib/meshcore-decoder/dist/crypto/channel-crypto.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"channel-crypto.d.ts","sourceRoot":"","sources":["../../src/crypto/channel-crypto.ts"],"names":[],"mappings":"AAIA,OAAO,EAAE,gBAAgB,EAAE,MAAM,iBAAiB,CAAC;AAGnD,qBAAa,aAAa;IACxB;;;;OAIG;IACH,MAAM,CAAC,uBAAuB,CAC5B,UAAU,EAAE,MAAM,EAClB,SAAS,EAAE,MAAM,EACjB,UAAU,EAAE,MAAM,GACjB,gBAAgB;IAuFnB;;;OAGG;IACH,MAAM,CAAC,oBAAoB,CAAC,YAAY,EAAE,MAAM,GAAG,MAAM;CAK1D"}

frontend/lib/meshcore-decoder/dist/crypto/channel-crypto.js

@@ -0,0 +1,94 @@
+"use strict";
+// Copyright (c) 2025 Michael Hart: https://github.com/michaelhart/meshcore-decoder
+// MIT License
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.ChannelCrypto = void 0;
+const crypto_js_1 = require("crypto-js");
+const hex_1 = require("../utils/hex");
+class ChannelCrypto {
+    /**
+     * Decrypt GroupText message using MeshCore algorithm:
+     * - HMAC-SHA256 verification with 2-byte MAC
+     * - AES-128 ECB decryption
+     */
+    static decryptGroupTextMessage(ciphertext, cipherMac, channelKey) {
+        try {
+            // convert hex strings to byte arrays
+            const channelKey16 = (0, hex_1.hexToBytes)(channelKey);
+            const macBytes = (0, hex_1.hexToBytes)(cipherMac);
+            // MeshCore uses 32-byte channel secret: 16-byte key + 16 zero bytes
+            const channelSecret = new Uint8Array(32);
+            channelSecret.set(channelKey16, 0);
+            // Step 1: Verify HMAC-SHA256 using full 32-byte channel secret
+            const calculatedMac = (0, crypto_js_1.HmacSHA256)(crypto_js_1.enc.Hex.parse(ciphertext), crypto_js_1.enc.Hex.parse((0, hex_1.bytesToHex)(channelSecret)));
+            const calculatedMacBytes = (0, hex_1.hexToBytes)(calculatedMac.toString(crypto_js_1.enc.Hex));
+            const calculatedMacFirst2 = calculatedMacBytes.slice(0, 2);
+            if (calculatedMacFirst2[0] !== macBytes[0] || calculatedMacFirst2[1] !== macBytes[1]) {
+                return { success: false, error: 'MAC verification failed' };
+            }
+            // Step 2: Decrypt using AES-128 ECB with first 16 bytes of channel secret
+            const keyWords = crypto_js_1.enc.Hex.parse(channelKey);
+            const ciphertextWords = crypto_js_1.enc.Hex.parse(ciphertext);
+            const decrypted = crypto_js_1.AES.decrypt(crypto_js_1.lib.CipherParams.create({ ciphertext: ciphertextWords }), keyWords, { mode: crypto_js_1.mode.ECB, padding: crypto_js_1.pad.NoPadding });
+            const decryptedBytes = (0, hex_1.hexToBytes)(decrypted.toString(crypto_js_1.enc.Hex));
+            if (!decryptedBytes || decryptedBytes.length < 5) {
+                return { success: false, error: 'Decrypted content too short' };
+            }
+            // parse MeshCore format: timestamp(4) + flags(1) + message_text
+            const timestamp = decryptedBytes[0] |
+                (decryptedBytes[1] << 8) |
+                (decryptedBytes[2] << 16) |
+                (decryptedBytes[3] << 24);
+            const flagsAndAttempt = decryptedBytes[4];
+            // extract message text with UTF-8 decoding
+            const messageBytes = decryptedBytes.slice(5);
+            const decoder = new TextDecoder('utf-8');
+            let messageText = decoder.decode(messageBytes);
+            // remove null terminator if present
+            const nullIndex = messageText.indexOf('\0');
+            if (nullIndex >= 0) {
+                messageText = messageText.substring(0, nullIndex);
+            }
+            // parse sender and message (format: "sender: message")
+            const colonIndex = messageText.indexOf(': ');
+            let sender;
+            let content;
+            if (colonIndex > 0 && colonIndex < 50) {
+                const potentialSender = messageText.substring(0, colonIndex);
+                if (!/[:\[\]]/.test(potentialSender)) {
+                    sender = potentialSender;
+                    content = messageText.substring(colonIndex + 2);
+                }
+                else {
+                    content = messageText;
+                }
+            }
+            else {
+                content = messageText;
+            }
+            return {
+                success: true,
+                data: {
+                    timestamp,
+                    flags: flagsAndAttempt,
+                    sender,
+                    message: content
+                }
+            };
+        }
+        catch (error) {
+            return { success: false, error: error instanceof Error ? error.message : 'Decryption failed' };
+        }
+    }
+    /**
+     * Calculate MeshCore channel hash from secret key
+     * Returns the first byte of SHA256(secret) as hex string
+     */
+    static calculateChannelHash(secretKeyHex) {
+        const hash = (0, crypto_js_1.SHA256)(crypto_js_1.enc.Hex.parse(secretKeyHex));
+        const hashBytes = (0, hex_1.hexToBytes)(hash.toString(crypto_js_1.enc.Hex));
+        return hashBytes[0].toString(16).padStart(2, '0');
+    }
+}
+exports.ChannelCrypto = ChannelCrypto;
+//# sourceMappingURL=channel-crypto.js.map

frontend/lib/meshcore-decoder/dist/crypto/channel-crypto.js.map

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frontend/lib/meshcore-decoder/dist/crypto/ed25519-verifier.d.ts

@@ -0,0 +1,48 @@
+export declare class Ed25519SignatureVerifier {
+    /**
+     * Verify an Ed25519 signature for MeshCore advertisement packets
+     *
+     * According to MeshCore protocol, the signed message for advertisements is:
+     * timestamp (4 bytes LE) + flags (1 byte) + location (8 bytes LE, if present) + name (variable, if present)
+     */
+    static verifyAdvertisementSignature(publicKeyHex: string, signatureHex: string, timestamp: number, appDataHex: string): Promise<boolean>;
+    /**
+     * Construct the signed message for MeshCore advertisements
+     * According to MeshCore source (Mesh.cpp lines 242-248):
+     * Format: public_key (32 bytes) + timestamp (4 bytes LE) + app_data (variable length)
+     */
+    private static constructAdvertSignedMessage;
+    /**
+     * Get a human-readable description of what was signed
+     */
+    static getSignedMessageDescription(publicKeyHex: string, timestamp: number, appDataHex: string): string;
+    /**
+     * Get the hex representation of the signed message for debugging
+     */
+    static getSignedMessageHex(publicKeyHex: string, timestamp: number, appDataHex: string): string;
+    /**
+     * Derive Ed25519 public key from orlp/ed25519 private key format
+     * This implements the same algorithm as orlp/ed25519's ed25519_derive_pub()
+     *
+     * @param privateKeyHex - 64-byte private key in hex format (orlp/ed25519 format)
+     * @returns 32-byte public key in hex format
+     */
+    static derivePublicKey(privateKeyHex: string): Promise<string>;
+    /**
+     * Derive Ed25519 public key from orlp/ed25519 private key format (synchronous version)
+     * This implements the same algorithm as orlp/ed25519's ed25519_derive_pub()
+     *
+     * @param privateKeyHex - 64-byte private key in hex format (orlp/ed25519 format)
+     * @returns 32-byte public key in hex format
+     */
+    static derivePublicKeySync(privateKeyHex: string): string;
+    /**
+     * Validate that a private key correctly derives to the expected public key
+     *
+     * @param privateKeyHex - 64-byte private key in hex format
+     * @param expectedPublicKeyHex - Expected 32-byte public key in hex format
+     * @returns true if the private key derives to the expected public key
+     */
+    static validateKeyPair(privateKeyHex: string, expectedPublicKeyHex: string): Promise<boolean>;
+}
+//# sourceMappingURL=ed25519-verifier.d.ts.map

frontend/lib/meshcore-decoder/dist/crypto/ed25519-verifier.d.ts.map

@@ -0,0 +1 @@
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frontend/lib/meshcore-decoder/dist/crypto/ed25519-verifier.js

@@ -0,0 +1,217 @@
+"use strict";
+// Copyright (c) 2025 Michael Hart: https://github.com/michaelhart/meshcore-decoder
+// MIT License
+var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    var desc = Object.getOwnPropertyDescriptor(m, k);
+    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
+      desc = { enumerable: true, get: function() { return m[k]; } };
+    }
+    Object.defineProperty(o, k2, desc);
+}) : (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    o[k2] = m[k];
+}));
+var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
+    Object.defineProperty(o, "default", { enumerable: true, value: v });
+}) : function(o, v) {
+    o["default"] = v;
+});
+var __importStar = (this && this.__importStar) || (function () {
+    var ownKeys = function(o) {
+        ownKeys = Object.getOwnPropertyNames || function (o) {
+            var ar = [];
+            for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
+            return ar;
+        };
+        return ownKeys(o);
+    };
+    return function (mod) {
+        if (mod && mod.__esModule) return mod;
+        var result = {};
+        if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
+        __setModuleDefault(result, mod);
+        return result;
+    };
+})();
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.Ed25519SignatureVerifier = void 0;
+const ed25519 = __importStar(require("@noble/ed25519"));
+const hex_1 = require("../utils/hex");
+const orlp_ed25519_wasm_1 = require("./orlp-ed25519-wasm");
+// Cross-platform SHA-512 implementation
+async function sha512Hash(data) {
+    // Browser environment - use Web Crypto API
+    if (typeof globalThis !== 'undefined' && globalThis.crypto && globalThis.crypto.subtle) {
+        const hashBuffer = await globalThis.crypto.subtle.digest('SHA-512', data);
+        return new Uint8Array(hashBuffer);
+    }
+    // Node.js environment - use crypto module
+    if (typeof require !== 'undefined') {
+        try {
+            const { createHash } = require('crypto');
+            return createHash('sha512').update(data).digest();
+        }
+        catch (error) {
+            // Fallback for environments where require is not available
+        }
+    }
+    throw new Error('No SHA-512 implementation available');
+}
+function sha512HashSync(data) {
+    // Node.js environment - use crypto module
+    if (typeof require !== 'undefined') {
+        try {
+            const { createHash } = require('crypto');
+            return createHash('sha512').update(data).digest();
+        }
+        catch (error) {
+            // Fallback
+        }
+    }
+    // Browser environment fallback - use crypto-js for sync operation
+    try {
+        const CryptoJS = require('crypto-js');
+        const wordArray = CryptoJS.lib.WordArray.create(data);
+        const hash = CryptoJS.SHA512(wordArray);
+        const hashBytes = new Uint8Array(64);
+        // Convert CryptoJS hash to Uint8Array
+        for (let i = 0; i < 16; i++) {
+            const word = hash.words[i] || 0;
+            hashBytes[i * 4] = (word >>> 24) & 0xff;
+            hashBytes[i * 4 + 1] = (word >>> 16) & 0xff;
+            hashBytes[i * 4 + 2] = (word >>> 8) & 0xff;
+            hashBytes[i * 4 + 3] = word & 0xff;
+        }
+        return hashBytes;
+    }
+    catch (error) {
+        // Final fallback - this should not happen since crypto-js is a dependency
+        throw new Error('No SHA-512 implementation available for synchronous operation');
+    }
+}
+// Set up SHA-512 for @noble/ed25519
+ed25519.etc.sha512Async = sha512Hash;
+// Always set up sync version - @noble/ed25519 requires it
+// It will throw in browser environments, which @noble/ed25519 can handle
+try {
+    ed25519.etc.sha512Sync = sha512HashSync;
+}
+catch (error) {
+    console.debug('Could not set up synchronous SHA-512:', error);
+}
+class Ed25519SignatureVerifier {
+    /**
+     * Verify an Ed25519 signature for MeshCore advertisement packets
+     *
+     * According to MeshCore protocol, the signed message for advertisements is:
+     * timestamp (4 bytes LE) + flags (1 byte) + location (8 bytes LE, if present) + name (variable, if present)
+     */
+    static async verifyAdvertisementSignature(publicKeyHex, signatureHex, timestamp, appDataHex) {
+        try {
+            // Convert hex strings to Uint8Arrays
+            const publicKey = (0, hex_1.hexToBytes)(publicKeyHex);
+            const signature = (0, hex_1.hexToBytes)(signatureHex);
+            const appData = (0, hex_1.hexToBytes)(appDataHex);
+            // Construct the signed message according to MeshCore format
+            const message = this.constructAdvertSignedMessage(publicKeyHex, timestamp, appData);
+            // Verify the signature using noble-ed25519
+            return await ed25519.verify(signature, message, publicKey);
+        }
+        catch (error) {
+            console.error('Ed25519 signature verification failed:', error);
+            return false;
+        }
+    }
+    /**
+     * Construct the signed message for MeshCore advertisements
+     * According to MeshCore source (Mesh.cpp lines 242-248):
+     * Format: public_key (32 bytes) + timestamp (4 bytes LE) + app_data (variable length)
+     */
+    static constructAdvertSignedMessage(publicKeyHex, timestamp, appData) {
+        const publicKey = (0, hex_1.hexToBytes)(publicKeyHex);
+        // Timestamp (4 bytes, little-endian)
+        const timestampBytes = new Uint8Array(4);
+        timestampBytes[0] = timestamp & 0xFF;
+        timestampBytes[1] = (timestamp >> 8) & 0xFF;
+        timestampBytes[2] = (timestamp >> 16) & 0xFF;
+        timestampBytes[3] = (timestamp >> 24) & 0xFF;
+        // Concatenate: public_key + timestamp + app_data
+        const message = new Uint8Array(32 + 4 + appData.length);
+        message.set(publicKey, 0);
+        message.set(timestampBytes, 32);
+        message.set(appData, 36);
+        return message;
+    }
+    /**
+     * Get a human-readable description of what was signed
+     */
+    static getSignedMessageDescription(publicKeyHex, timestamp, appDataHex) {
+        return `Public Key: ${publicKeyHex} + Timestamp: ${timestamp} (${new Date(timestamp * 1000).toISOString()}) + App Data: ${appDataHex}`;
+    }
+    /**
+     * Get the hex representation of the signed message for debugging
+     */
+    static getSignedMessageHex(publicKeyHex, timestamp, appDataHex) {
+        const appData = (0, hex_1.hexToBytes)(appDataHex);
+        const message = this.constructAdvertSignedMessage(publicKeyHex, timestamp, appData);
+        return (0, hex_1.bytesToHex)(message);
+    }
+    /**
+     * Derive Ed25519 public key from orlp/ed25519 private key format
+     * This implements the same algorithm as orlp/ed25519's ed25519_derive_pub()
+     *
+     * @param privateKeyHex - 64-byte private key in hex format (orlp/ed25519 format)
+     * @returns 32-byte public key in hex format
+     */
+    static async derivePublicKey(privateKeyHex) {
+        try {
+            const privateKeyBytes = (0, hex_1.hexToBytes)(privateKeyHex);
+            if (privateKeyBytes.length !== 64) {
+                throw new Error(`Invalid private key length: expected 64 bytes, got ${privateKeyBytes.length}`);
+            }
+            // Use the orlp/ed25519 WebAssembly implementation
+            return await (0, orlp_ed25519_wasm_1.derivePublicKey)(privateKeyHex);
+        }
+        catch (error) {
+            throw new Error(`Failed to derive public key: ${error instanceof Error ? error.message : 'Unknown error'}`);
+        }
+    }
+    /**
+     * Derive Ed25519 public key from orlp/ed25519 private key format (synchronous version)
+     * This implements the same algorithm as orlp/ed25519's ed25519_derive_pub()
+     *
+     * @param privateKeyHex - 64-byte private key in hex format (orlp/ed25519 format)
+     * @returns 32-byte public key in hex format
+     */
+    static derivePublicKeySync(privateKeyHex) {
+        try {
+            const privateKeyBytes = (0, hex_1.hexToBytes)(privateKeyHex);
+            if (privateKeyBytes.length !== 64) {
+                throw new Error(`Invalid private key length: expected 64 bytes, got ${privateKeyBytes.length}`);
+            }
+            // Note: WASM operations are async, so this sync version throws an error
+            throw new Error('Synchronous key derivation not supported with WASM. Use derivePublicKey() instead.');
+        }
+        catch (error) {
+            throw new Error(`Failed to derive public key: ${error instanceof Error ? error.message : 'Unknown error'}`);
+        }
+    }
+    /**
+     * Validate that a private key correctly derives to the expected public key
+     *
+     * @param privateKeyHex - 64-byte private key in hex format
+     * @param expectedPublicKeyHex - Expected 32-byte public key in hex format
+     * @returns true if the private key derives to the expected public key
+     */
+    static async validateKeyPair(privateKeyHex, expectedPublicKeyHex) {
+        try {
+            return await (0, orlp_ed25519_wasm_1.validateKeyPair)(privateKeyHex, expectedPublicKeyHex);
+        }
+        catch (error) {
+            return false;
+        }
+    }
+}
+exports.Ed25519SignatureVerifier = Ed25519SignatureVerifier;
+//# sourceMappingURL=ed25519-verifier.js.map

frontend/lib/meshcore-decoder/dist/crypto/key-manager.d.ts

@@ -0,0 +1,23 @@
+import { CryptoKeyStore } from '../types/crypto';
+export declare class MeshCoreKeyStore implements CryptoKeyStore {
+    nodeKeys: Map<string, string>;
+    private channelHashToKeys;
+    constructor(initialKeys?: {
+        channelSecrets?: string[];
+        nodeKeys?: Record<string, string>;
+    });
+    addNodeKey(publicKey: string, privateKey: string): void;
+    hasChannelKey(channelHash: string): boolean;
+    hasNodeKey(publicKey: string): boolean;
+    /**
+     * Get all channel keys that match the given channel hash (handles collisions)
+     */
+    getChannelKeys(channelHash: string): string[];
+    getNodeKey(publicKey: string): string | undefined;
+    /**
+     * Add channel keys by secret keys (new simplified API)
+     * Automatically calculates channel hashes
+     */
+    addChannelSecrets(secretKeys: string[]): void;
+}
+//# sourceMappingURL=key-manager.d.ts.map

frontend/lib/meshcore-decoder/dist/crypto/key-manager.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"key-manager.d.ts","sourceRoot":"","sources":["../../src/crypto/key-manager.ts"],"names":[],"mappings":"AAGA,OAAO,EAAE,cAAc,EAAE,MAAM,iBAAiB,CAAC;AAGjD,qBAAa,gBAAiB,YAAW,cAAc;IAC9C,QAAQ,EAAE,GAAG,CAAC,MAAM,EAAE,MAAM,CAAC,CAAa;IAGjD,OAAO,CAAC,iBAAiB,CAA+B;gBAE5C,WAAW,CAAC,EAAE;QACxB,cAAc,CAAC,EAAE,MAAM,EAAE,CAAC;QAC1B,QAAQ,CAAC,EAAE,MAAM,CAAC,MAAM,EAAE,MAAM,CAAC,CAAC;KACnC;IAYD,UAAU,CAAC,SAAS,EAAE,MAAM,EAAE,UAAU,EAAE,MAAM,GAAG,IAAI;IAKvD,aAAa,CAAC,WAAW,EAAE,MAAM,GAAG,OAAO;IAK3C,UAAU,CAAC,SAAS,EAAE,MAAM,GAAG,OAAO;IAKtC;;OAEG;IACH,cAAc,CAAC,WAAW,EAAE,MAAM,GAAG,MAAM,EAAE;IAK7C,UAAU,CAAC,SAAS,EAAE,MAAM,GAAG,MAAM,GAAG,SAAS;IAKjD;;;OAGG;IACH,iBAAiB,CAAC,UAAU,EAAE,MAAM,EAAE,GAAG,IAAI;CAW9C"}

frontend/lib/meshcore-decoder/dist/crypto/key-manager.js

@@ -0,0 +1,60 @@
+"use strict";
+// Copyright (c) 2025 Michael Hart: https://github.com/michaelhart/meshcore-decoder
+// MIT License
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.MeshCoreKeyStore = void 0;
+const channel_crypto_1 = require("./channel-crypto");
+class MeshCoreKeyStore {
+    constructor(initialKeys) {
+        this.nodeKeys = new Map();
+        // internal map for hash -> multiple keys (collision handling)
+        this.channelHashToKeys = new Map();
+        if (initialKeys?.channelSecrets) {
+            this.addChannelSecrets(initialKeys.channelSecrets);
+        }
+        if (initialKeys?.nodeKeys) {
+            Object.entries(initialKeys.nodeKeys).forEach(([pubKey, privKey]) => {
+                this.addNodeKey(pubKey, privKey);
+            });
+        }
+    }
+    addNodeKey(publicKey, privateKey) {
+        const normalizedPubKey = publicKey.toUpperCase();
+        this.nodeKeys.set(normalizedPubKey, privateKey);
+    }
+    hasChannelKey(channelHash) {
+        const normalizedHash = channelHash.toLowerCase();
+        return this.channelHashToKeys.has(normalizedHash);
+    }
+    hasNodeKey(publicKey) {
+        const normalizedPubKey = publicKey.toUpperCase();
+        return this.nodeKeys.has(normalizedPubKey);
+    }
+    /**
+     * Get all channel keys that match the given channel hash (handles collisions)
+     */
+    getChannelKeys(channelHash) {
+        const normalizedHash = channelHash.toLowerCase();
+        return this.channelHashToKeys.get(normalizedHash) || [];
+    }
+    getNodeKey(publicKey) {
+        const normalizedPubKey = publicKey.toUpperCase();
+        return this.nodeKeys.get(normalizedPubKey);
+    }
+    /**
+     * Add channel keys by secret keys (new simplified API)
+     * Automatically calculates channel hashes
+     */
+    addChannelSecrets(secretKeys) {
+        for (const secretKey of secretKeys) {
+            const channelHash = channel_crypto_1.ChannelCrypto.calculateChannelHash(secretKey).toLowerCase();
+            // Handle potential hash collisions
+            if (!this.channelHashToKeys.has(channelHash)) {
+                this.channelHashToKeys.set(channelHash, []);
+            }
+            this.channelHashToKeys.get(channelHash).push(secretKey);
+        }
+    }
+}
+exports.MeshCoreKeyStore = MeshCoreKeyStore;
+//# sourceMappingURL=key-manager.js.map

frontend/lib/meshcore-decoder/dist/crypto/key-manager.js.map

@@ -0,0 +1 @@
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frontend/lib/meshcore-decoder/dist/crypto/orlp-ed25519-wasm.d.ts

@@ -0,0 +1,34 @@
+/**
+ * Derive Ed25519 public key from private key using the exact orlp/ed25519 algorithm
+ *
+ * @param privateKeyHex - 64-byte private key in hex format (orlp/ed25519 format)
+ * @returns 32-byte public key in hex format
+ */
+export declare function derivePublicKey(privateKeyHex: string): Promise<string>;
+/**
+ * Validate that a private key and public key pair match using orlp/ed25519
+ *
+ * @param privateKeyHex - 64-byte private key in hex format
+ * @param expectedPublicKeyHex - 32-byte public key in hex format
+ * @returns true if the keys match, false otherwise
+ */
+export declare function validateKeyPair(privateKeyHex: string, expectedPublicKeyHex: string): Promise<boolean>;
+/**
+ * Sign a message using Ed25519 with orlp/ed25519 implementation
+ *
+ * @param messageHex - Message to sign in hex format
+ * @param privateKeyHex - 64-byte private key in hex format (orlp/ed25519 format)
+ * @param publicKeyHex - 32-byte public key in hex format
+ * @returns 64-byte signature in hex format
+ */
+export declare function sign(messageHex: string, privateKeyHex: string, publicKeyHex: string): Promise<string>;
+/**
+ * Verify an Ed25519 signature using orlp/ed25519 implementation
+ *
+ * @param signatureHex - 64-byte signature in hex format
+ * @param messageHex - Message that was signed in hex format
+ * @param publicKeyHex - 32-byte public key in hex format
+ * @returns true if signature is valid, false otherwise
+ */
+export declare function verify(signatureHex: string, messageHex: string, publicKeyHex: string): Promise<boolean>;
+//# sourceMappingURL=orlp-ed25519-wasm.d.ts.map