feat(analyzer): seed Letsmesh as a normal DB row and flip switch UX

Letsmesh Analyzer is now a regular analyzers row, seeded once via an
app_settings flag on first startup. It can be renamed, disabled, or
deleted like any user entry. The frontend drops the special built-in
pseudo-row and the built-in slot in the chooser.

Click resolution updated: 0 enabled → toast "No analyzer configured";
1 enabled → open directly; multiple with a default → open default;
multiple without default → chooser.

The row switch and the edit modal now show "Enabled" (checked = active),
which matches intuition. The DB column remains is_disabled so no data
migration is needed — the UI simply inverts the value on read/write.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

app/database.py

@@ -558,6 +558,25 @@ class Database:
     # Analyzers (user-configured MeshCore Analyzer services)
     # ================================================================
 
+    LETSMESH_ANALYZER_URL_TEMPLATE = 'https://analyzer.letsmesh.net/packets?packet_hash={packetHash}'
+    LETSMESH_ANALYZER_NAME = 'Letsmesh Analyzer'
+    _LETSMESH_SEED_FLAG = 'analyzer_letsmesh_seeded'
+
+    def seed_default_analyzers(self) -> None:
+        """Seed the Letsmesh Analyzer row on first startup after this feature was added.
+
+        Uses an app_settings flag so the seed happens exactly once per installation.
+        If the user later renames, disables or deletes the row, we won't re-create it.
+        """
+        if self.get_setting(self._LETSMESH_SEED_FLAG) is not None:
+            return
+        with self._connect() as conn:
+            conn.execute(
+                "INSERT OR IGNORE INTO analyzers (name, url_template) VALUES (?, ?)",
+                (self.LETSMESH_ANALYZER_NAME, self.LETSMESH_ANALYZER_URL_TEMPLATE)
+            )
+        self.set_setting(self._LETSMESH_SEED_FLAG, '1')
+
     def create_analyzer(self, name: str, url_template: str) -> int:
         """Insert a new analyzer. Raises sqlite3.IntegrityError on duplicate name."""
         with self._connect() as conn:

app/device_manager.py

@@ -20,7 +20,6 @@ from urllib.parse import urlparse, parse_qs
 
 from Crypto.Cipher import AES
 
-LETSMESH_ANALYZER_URL_TEMPLATE = 'https://analyzer.letsmesh.net/packets?packet_hash={packetHash}'
 GRP_TXT_TYPE_BYTE = 0x05
 
 logger = logging.getLogger(__name__)

app/main.py

@@ -253,6 +253,9 @@ def create_app():
     db = Database(db_path)
     app.db = db
 
+    # One-time seed: add Letsmesh Analyzer row so it behaves like any other entry.
+    db.seed_default_analyzers()
+
     # Migrate settings from .webui_settings.json to DB (one-time)
     settings_file = Path(config.MC_CONFIG_DIR) / ".webui_settings.json"
     if settings_file.exists() and db.get_setting('manual_add_contacts') is None:

app/routes/api.py

@@ -20,7 +20,7 @@ from flask import Blueprint, jsonify, request, send_file, current_app
 from app.meshcore import cli, parser
 from app.meshcore.regions import derive_scope_key_hex, is_valid_region_name
 from app.config import config, runtime_config
-from app.device_manager import decode_path_len, LETSMESH_ANALYZER_URL_TEMPLATE
+from app.device_manager import decode_path_len
 from app.archiver import manager as archive_manager
 from app.contacts_cache import get_all_names, get_all_contacts
 
@@ -4257,7 +4257,7 @@ def _validate_analyzer_url_template(url_template: str):
 
 @api_bp.route('/analyzers', methods=['GET'])
 def list_analyzers_api():
-    """List user-configured analyzers and the built-in Letsmesh URL template."""
+    """List user-configured analyzers."""
     try:
         db = _get_db()
         if not db:
@@ -4265,7 +4265,6 @@ def list_analyzers_api():
         return jsonify({
             'success': True,
             'analyzers': db.list_analyzers(),
-            'letsmesh_url_template': LETSMESH_ANALYZER_URL_TEMPLATE,
         }), 200
     except Exception as e:
         logger.error(f"Error listing analyzers: {e}")

app/static/js/app.js

@@ -3160,7 +3160,6 @@ async function clearDefaultRegion() {
 const ANALYZER_PLACEHOLDER = '{packetHash}';
 window.analyzerCache = window.analyzerCache || {
     analyzers: [],
-    letsmesh_url_template: 'https://analyzer.letsmesh.net/packets?packet_hash={packetHash}',
     loaded: false,
 };
 
@@ -3185,9 +3184,6 @@ async function loadAnalyzers() {
         const data = await resp.json();
         if (!data.success) throw new Error(data.error || 'Failed');
         window.analyzerCache.analyzers = data.analyzers || [];
-        if (data.letsmesh_url_template) {
-            window.analyzerCache.letsmesh_url_template = data.letsmesh_url_template;
-        }
         window.analyzerCache.loaded = true;
         renderAnalyzersList();
     } catch (e) {
@@ -3204,26 +3200,15 @@ function renderAnalyzersList() {
     if (!listEl) return;
     const analyzers = window.analyzerCache.analyzers || [];
 
-    const builtinRow = `
-        <div class="list-group-item d-flex align-items-center gap-2 py-2">
-            <span class="text-muted" title="Built-in default — not configurable">
-                <i class="bi bi-star"></i>
-            </span>
-            <div class="flex-grow-1" style="min-width: 0;">
-                <div><strong>Letsmesh Analyzer</strong> <span class="badge bg-light text-muted">built-in</span></div>
-                <code class="small text-muted text-break" style="word-break: break-all;">${escapeHtml(window.analyzerCache.letsmesh_url_template)}</code>
-            </div>
-        </div>
-    `;
-
     if (analyzers.length === 0) {
-        listEl.innerHTML = builtinRow +
+        listEl.innerHTML =
-            '<div class="text-center text-muted small py-3">No custom analyzers. Click "Add analyzer" to add one.</div>';
+            '<div class="text-center text-muted small py-3">No analyzers configured. Click "Add analyzer" to add one.</div>';
         return;
     }
 
     const rows = analyzers.map(a => {
         const disabled = !!a.is_disabled;
+        const enabled = !disabled;
         const isDefault = !!a.is_default;
         const starIcon = isDefault ? 'bi-star-fill text-warning' : 'bi-star';
         const disabledBadge = disabled
@@ -3241,10 +3226,10 @@ function renderAnalyzersList() {
                     <div class="${nameClass}"><strong>${safeName}</strong>${disabledBadge}</div>
                     <code class="small text-muted text-break" style="word-break: break-all;">${escapeHtml(a.url_template)}</code>
                 </div>
-                <div class="form-check form-switch mb-0" title="Disabled">
+                <div class="form-check form-switch mb-0" title="${enabled ? 'Enabled' : 'Disabled'}">
                     <input class="form-check-input" type="checkbox"
-                           id="analyzerDisabled_${a.id}" ${disabled ? 'checked' : ''}
+                           id="analyzerEnabled_${a.id}" ${enabled ? 'checked' : ''}
-                           onchange="toggleAnalyzerDisabled(${a.id}, this.checked)">
+                           onchange="toggleAnalyzerDisabled(${a.id}, !this.checked)">
                 </div>
                 <button type="button" class="btn btn-sm btn-outline-secondary"
                         onclick="openAnalyzerEditModal(${a.id})" title="Edit">
@@ -3258,7 +3243,7 @@ function renderAnalyzersList() {
         `;
     }).join('');
 
-    listEl.innerHTML = builtinRow + rows;
+    listEl.innerHTML = rows;
 }
 
 function openAnalyzerEditModal(id) {
@@ -3268,7 +3253,7 @@ function openAnalyzerEditModal(id) {
     const idEl = document.getElementById('analyzerEditId');
     const nameEl = document.getElementById('analyzerEditName');
     const urlEl = document.getElementById('analyzerEditUrl');
-    const disabledEl = document.getElementById('analyzerEditDisabled');
+    const enabledEl = document.getElementById('analyzerEditEnabled');
     const errorEl = document.getElementById('analyzerEditError');
 
     errorEl.classList.add('d-none');
@@ -3281,13 +3266,13 @@ function openAnalyzerEditModal(id) {
         idEl.value = String(a.id);
         nameEl.value = a.name || '';
         urlEl.value = a.url_template || '';
-        disabledEl.checked = !!a.is_disabled;
+        enabledEl.checked = !a.is_disabled;
     } else {
         titleEl.textContent = 'Add analyzer';
         idEl.value = '';
         nameEl.value = '';
         urlEl.value = '';
-        disabledEl.checked = false;
+        enabledEl.checked = true;
     }
 
     modalEl.addEventListener('shown.bs.modal', _bumpAnalyzerBackdrop, { once: true });
@@ -3298,13 +3283,13 @@ async function saveAnalyzerFromForm() {
     const idEl = document.getElementById('analyzerEditId');
     const nameEl = document.getElementById('analyzerEditName');
     const urlEl = document.getElementById('analyzerEditUrl');
-    const disabledEl = document.getElementById('analyzerEditDisabled');
+    const enabledEl = document.getElementById('analyzerEditEnabled');
     const errorEl = document.getElementById('analyzerEditError');
 
     const id = idEl.value ? parseInt(idEl.value, 10) : null;
     const name = (nameEl.value || '').trim();
     const url_template = (urlEl.value || '').trim();
-    const is_disabled = !!disabledEl.checked;
+    const is_disabled = !enabledEl.checked;
 
     if (!name) {
         showAnalyzerFormError('Name is required');
@@ -3428,11 +3413,10 @@ async function openMessageAnalyzer(packetHash) {
     await ensureAnalyzersLoaded();
 
     const enabled = getEnabledCustomAnalyzers();
-    const letsmeshTpl = window.analyzerCache.letsmesh_url_template;
 
-    // No custom analyzers — open Letsmesh directly.
+    // Nothing enabled — user has deliberately turned everything off or deleted it.
     if (enabled.length === 0) {
-        window.open(substituteAnalyzerUrl(letsmeshTpl, packetHash), 'meshcore-analyzer');
+        showNotification('No analyzer configured. Add one in Settings → Analyzer.', 'warning');
         return;
     }
 
@@ -3443,7 +3427,13 @@ async function openMessageAnalyzer(packetHash) {
         return;
     }
 
-    // Otherwise — show chooser modal (Letsmesh + enabled customs sorted by name).
+    // Only one enabled analyzer — open it directly, no need to ask.
+    if (enabled.length === 1) {
+        window.open(substituteAnalyzerUrl(enabled[0].url_template, packetHash), 'meshcore-analyzer');
+        return;
+    }
+
+    // Multiple enabled, no default — show chooser.
     openAnalyzerChooser(packetHash, enabled);
 }
 
@@ -3452,26 +3442,17 @@ function openAnalyzerChooser(packetHash, enabled) {
     const listEl = document.getElementById('analyzerChooserList');
     if (!modalEl || !listEl) return;
 
-    const letsmeshTpl = window.analyzerCache.letsmesh_url_template;
     const sorted = (enabled || []).slice().sort((a, b) =>
         (a.name || '').localeCompare(b.name || '', undefined, { sensitivity: 'base' })
     );
 
-    const builtinItem = `
+    listEl.innerHTML = sorted.map(a => `
-        <button type="button" class="list-group-item list-group-item-action"
-                data-url="${escapeHtml(substituteAnalyzerUrl(letsmeshTpl, packetHash))}">
-            <i class="bi bi-clipboard-data"></i> Letsmesh Analyzer
-            <span class="badge bg-light text-muted ms-1">built-in</span>
-        </button>
-    `;
-    const customItems = sorted.map(a => `
         <button type="button" class="list-group-item list-group-item-action"
                 data-url="${escapeHtml(substituteAnalyzerUrl(a.url_template, packetHash))}">
             <i class="bi bi-clipboard-data"></i> ${escapeHtml(a.name)}
         </button>
     `).join('');
 
-    listEl.innerHTML = builtinItem + customItems;
     const modal = bootstrap.Modal.getOrCreateInstance(modalEl);
 
     listEl.querySelectorAll('button[data-url]').forEach(btn => {

app/templates/base.html

@@ -1056,8 +1056,8 @@
                             <div class="form-text small">Must include <code>{packetHash}</code>.</div>
                         </div>
                         <div class="form-check form-switch">
-                            <input class="form-check-input" type="checkbox" id="analyzerEditDisabled">
+                            <input class="form-check-input" type="checkbox" id="analyzerEditEnabled" checked>
-                            <label class="form-check-label small" for="analyzerEditDisabled">Disabled</label>
+                            <label class="form-check-label small" for="analyzerEditEnabled">Enabled</label>
                         </div>
                         <div id="analyzerEditError" class="alert alert-danger py-1 small mt-3 d-none"></div>
                     </div>