From 1b76211d535b0ae0dc4a3635b896f9b857fee7a9 Mon Sep 17 00:00:00 2001
From: Jack Kingsman <jack.kingsman@gmail.com>
Date: Tue, 24 Feb 2026 19:11:51 -0800
Subject: [PATCH] More code rip out

---
 app/decoder.py                                |   1 -
 frontend/src/components/SettingsModal.tsx     |   8 +-
 frontend/src/hooks/useAirtimeTracking.ts      |   2 +-
 frontend/src/hooks/useAppSettings.ts          |   1 -
 frontend/src/hooks/useConversationMessages.ts |   4 +-
 frontend/src/hooks/useRepeaterMode.ts         |  10 +-
 frontend/src/hooks/useUnreadCounts.ts         |   2 +-
 frontend/src/messageCache.ts                  |   7 +-
 frontend/src/test/contactAvatar.test.ts       | 106 +++-----
 frontend/src/test/messageCache.test.ts        |  19 +-
 frontend/src/test/pathUtils.test.ts           |  45 ----
 frontend/src/test/settingsModal.test.tsx      |   2 +-
 frontend/src/test/urlHash.test.ts             | 119 +--------
 frontend/src/test/useRepeaterMode.test.ts     | 241 ------------------
 frontend/src/types.ts                         |   8 +-
 frontend/src/utils/contactAvatar.ts           |   4 +-
 frontend/src/utils/pathUtils.ts               |   2 +-
 frontend/src/utils/radioPresets.ts            |   2 +-
 frontend/src/utils/urlHash.ts                 |   2 +-
 frontend/src/utils/visualizerUtils.ts         |  18 +-
 20 files changed, 70 insertions(+), 533 deletions(-)
 delete mode 100644 frontend/src/test/useRepeaterMode.test.ts

diff --git a/app/decoder.py b/app/decoder.py
index 5d0cefb..e24eab9 100644
--- a/app/decoder.py
+++ b/app/decoder.py
@@ -327,7 +327,6 @@ 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
diff --git a/frontend/src/components/SettingsModal.tsx b/frontend/src/components/SettingsModal.tsx
index 9eceff6..e7a43ae 100644
--- a/frontend/src/components/SettingsModal.tsx
+++ b/frontend/src/components/SettingsModal.tsx
@@ -26,13 +26,7 @@ import {
 } from '../utils/lastViewedConversation';
 import { RADIO_PRESETS } from '../utils/radioPresets';
 
-// Import for local use + re-export so existing imports from this file still work
-import {
-  SETTINGS_SECTION_ORDER,
-  SETTINGS_SECTION_LABELS,
-  type SettingsSection,
-} from './settingsConstants';
-export { SETTINGS_SECTION_ORDER, SETTINGS_SECTION_LABELS, type SettingsSection };
+import { SETTINGS_SECTION_LABELS, type SettingsSection } from './settingsConstants';
 
 interface SettingsModalBaseProps {
   open: boolean;
diff --git a/frontend/src/hooks/useAirtimeTracking.ts b/frontend/src/hooks/useAirtimeTracking.ts
index bee3406..c33e708 100644
--- a/frontend/src/hooks/useAirtimeTracking.ts
+++ b/frontend/src/hooks/useAirtimeTracking.ts
@@ -108,7 +108,7 @@ function createLocalMessage(conversationKey: string, text: string, outgoing: boo
   };
 }
 
-export interface UseAirtimeTrackingResult {
+interface UseAirtimeTrackingResult {
   /** Returns true if this was an airtime command that was handled */
   handleAirtimeCommand: (command: string, conversationId: string) => Promise<boolean>;
   /** Stop any active airtime tracking */
diff --git a/frontend/src/hooks/useAppSettings.ts b/frontend/src/hooks/useAppSettings.ts
index e6496e9..89b4fed 100644
--- a/frontend/src/hooks/useAppSettings.ts
+++ b/frontend/src/hooks/useAppSettings.ts
@@ -144,7 +144,6 @@ export function useAppSettings() {
 
   return {
     appSettings,
-    setAppSettings,
     favorites,
     fetchAppSettings,
     handleSaveAppSettings,
diff --git a/frontend/src/hooks/useConversationMessages.ts b/frontend/src/hooks/useConversationMessages.ts
index 598a7db..ebbc617 100644
--- a/frontend/src/hooks/useConversationMessages.ts
+++ b/frontend/src/hooks/useConversationMessages.ts
@@ -57,13 +57,12 @@ export function getMessageContentKey(msg: Message): string {
   return `${msg.type}-${msg.conversation_key}-${msg.text}-${ts}`;
 }
 
-export interface UseConversationMessagesResult {
+interface UseConversationMessagesResult {
   messages: Message[];
   messagesLoading: boolean;
   loadingOlder: boolean;
   hasOlderMessages: boolean;
   setMessages: React.Dispatch<React.SetStateAction<Message[]>>;
-  fetchMessages: (showLoading?: boolean) => Promise<void>;
   fetchOlderMessages: () => Promise<void>;
   addMessageIfNew: (msg: Message) => boolean;
   updateMessageAck: (messageId: number, ackCount: number, paths?: MessagePath[]) => void;
@@ -433,7 +432,6 @@ export function useConversationMessages(
     loadingOlder,
     hasOlderMessages,
     setMessages,
-    fetchMessages,
     fetchOlderMessages,
     addMessageIfNew,
     updateMessageAck,
diff --git a/frontend/src/hooks/useRepeaterMode.ts b/frontend/src/hooks/useRepeaterMode.ts
index cc40701..0e8c3ca 100644
--- a/frontend/src/hooks/useRepeaterMode.ts
+++ b/frontend/src/hooks/useRepeaterMode.ts
@@ -12,7 +12,7 @@ import { CONTACT_TYPE_REPEATER } from '../types';
 import { useAirtimeTracking } from './useAirtimeTracking';
 
 // Format seconds into human-readable duration (e.g., 1d17h2m, 1h5m, 3m)
-export function formatDuration(seconds: number): string {
+function formatDuration(seconds: number): string {
   if (seconds < 60) return `${seconds}s`;
 
   const days = Math.floor(seconds / 86400);
@@ -32,7 +32,7 @@ export function formatDuration(seconds: number): string {
 }
 
 // Format telemetry response as human-readable text
-export function formatTelemetry(telemetry: TelemetryResponse): string {
+function formatTelemetry(telemetry: TelemetryResponse): string {
   const lines = [
     `Telemetry`,
     `Battery Voltage: ${telemetry.battery_volts.toFixed(3)}V`,
@@ -57,7 +57,7 @@ export function formatTelemetry(telemetry: TelemetryResponse): string {
 }
 
 // Format neighbors list as human-readable text
-export function formatNeighbors(neighbors: NeighborInfo[]): string {
+function formatNeighbors(neighbors: NeighborInfo[]): string {
   if (neighbors.length === 0) {
     return 'Neighbors\nNo neighbors reported';
   }
@@ -73,7 +73,7 @@ export function formatNeighbors(neighbors: NeighborInfo[]): string {
 }
 
 // Format ACL list as human-readable text
-export function formatAcl(acl: AclEntry[]): string {
+function formatAcl(acl: AclEntry[]): string {
   if (acl.length === 0) {
     return 'ACL\nNo ACL entries';
   }
@@ -108,7 +108,7 @@ function createLocalMessage(
   };
 }
 
-export interface UseRepeaterModeResult {
+interface UseRepeaterModeResult {
   repeaterLoggedIn: boolean;
   activeContactIsRepeater: boolean;
   handleTelemetryRequest: (password: string) => Promise<void>;
diff --git a/frontend/src/hooks/useUnreadCounts.ts b/frontend/src/hooks/useUnreadCounts.ts
index b4bb06a..8821bd0 100644
--- a/frontend/src/hooks/useUnreadCounts.ts
+++ b/frontend/src/hooks/useUnreadCounts.ts
@@ -9,7 +9,7 @@ import {
 import type { Channel, Contact, Conversation, Message, UnreadCounts } from '../types';
 import { takePrefetch } from '../prefetch';
 
-export interface UseUnreadCountsResult {
+interface UseUnreadCountsResult {
   unreadCounts: Record<string, number>;
   /** Tracks which conversations have unread messages that mention the user */
   mentions: Record<string, boolean>;
diff --git a/frontend/src/messageCache.ts b/frontend/src/messageCache.ts
index 7433864..6528915 100644
--- a/frontend/src/messageCache.ts
+++ b/frontend/src/messageCache.ts
@@ -12,7 +12,7 @@ import type { Message, MessagePath } from './types';
 export const MAX_CACHED_CONVERSATIONS = 20;
 export const MAX_MESSAGES_PER_ENTRY = 200;
 
-export interface CacheEntry {
+interface CacheEntry {
   messages: Message[];
   seenContent: Set<string>;
   hasOlderMessages: boolean;
@@ -139,8 +139,3 @@ export function remove(id: string): void {
 export function clear(): void {
   cache.clear();
 }
-
-/** Get current cache size (for testing). */
-export function size(): number {
-  return cache.size;
-}
diff --git a/frontend/src/test/contactAvatar.test.ts b/frontend/src/test/contactAvatar.test.ts
index 55384c0..42a70ae 100644
--- a/frontend/src/test/contactAvatar.test.ts
+++ b/frontend/src/test/contactAvatar.test.ts
@@ -1,74 +1,7 @@
 import { describe, it, expect } from 'vitest';
-import { getAvatarText, getAvatarColor, getContactAvatar } from '../utils/contactAvatar';
+import { getContactAvatar } from '../utils/contactAvatar';
 import { CONTACT_TYPE_REPEATER } from '../types';
 
-describe('getAvatarText', () => {
-  it('returns first emoji when name contains emoji', () => {
-    expect(getAvatarText('John 🚀 Doe', 'abc123')).toBe('🚀');
-    expect(getAvatarText('🎉 Party', 'abc123')).toBe('🎉');
-    expect(getAvatarText('Test 😀 More 🎯', 'abc123')).toBe('😀');
-  });
-
-  it('returns full flag emoji (not just first regional indicator)', () => {
-    expect(getAvatarText('Jason 🇺🇸', 'abc123')).toBe('🇺🇸');
-    expect(getAvatarText('🇬🇧 London', 'abc123')).toBe('🇬🇧');
-    expect(getAvatarText('Test 🇯🇵 Japan', 'abc123')).toBe('🇯🇵');
-  });
-
-  it('returns initials when name has space', () => {
-    expect(getAvatarText('John Doe', 'abc123')).toBe('JD');
-    expect(getAvatarText('Alice Bob Charlie', 'abc123')).toBe('AB');
-    expect(getAvatarText('jane smith', 'abc123')).toBe('JS');
-  });
-
-  it('returns single letter when no space', () => {
-    expect(getAvatarText('John', 'abc123')).toBe('J');
-    expect(getAvatarText('alice', 'abc123')).toBe('A');
-  });
-
-  it('falls back to public key when name is null', () => {
-    expect(getAvatarText(null, 'abc123def456')).toBe('AB');
-  });
-
-  it('falls back to public key when name has no letters', () => {
-    expect(getAvatarText('123 456', 'xyz789')).toBe('XY');
-    expect(getAvatarText('---', 'def456')).toBe('DE');
-  });
-
-  it('handles space but no letter after', () => {
-    expect(getAvatarText('John ', 'abc123')).toBe('J');
-    expect(getAvatarText('A 123', 'abc123')).toBe('A');
-  });
-
-  it('emoji takes priority over initials', () => {
-    expect(getAvatarText('John 🎯 Doe', 'abc123')).toBe('🎯');
-  });
-});
-
-describe('getAvatarColor', () => {
-  it('returns consistent colors for same public key', () => {
-    const color1 = getAvatarColor('abc123def456');
-    const color2 = getAvatarColor('abc123def456');
-    expect(color1).toEqual(color2);
-  });
-
-  it('returns different colors for different public keys', () => {
-    const color1 = getAvatarColor('abc123def456');
-    const color2 = getAvatarColor('xyz789uvw012');
-    expect(color1.background).not.toBe(color2.background);
-  });
-
-  it('returns valid HSL background color', () => {
-    const color = getAvatarColor('test123');
-    expect(color.background).toMatch(/^hsl\(\d+, \d+%, \d+%\)$/);
-  });
-
-  it('returns white or black text color', () => {
-    const color = getAvatarColor('test123');
-    expect(['#ffffff', '#000000']).toContain(color.text);
-  });
-});
-
 describe('getContactAvatar', () => {
   it('returns complete avatar info', () => {
     const avatar = getContactAvatar('John Doe', 'abc123def456');
@@ -103,4 +36,41 @@ describe('getContactAvatar', () => {
     expect(avatar0.text).toBe('J');
     expect(avatar1.text).toBe('J');
   });
+
+  it('extracts emoji from name', () => {
+    const avatar = getContactAvatar('John 🚀 Doe', 'abc123');
+    expect(avatar.text).toBe('🚀');
+  });
+
+  it('extracts flag emoji', () => {
+    const avatar = getContactAvatar('Jason 🇺🇸', 'abc123');
+    expect(avatar.text).toBe('🇺🇸');
+  });
+
+  it('extracts initials from two-word name', () => {
+    const avatar = getContactAvatar('Jane Smith', 'abc123');
+    expect(avatar.text).toBe('JS');
+  });
+
+  it('extracts single letter from one-word name', () => {
+    const avatar = getContactAvatar('Alice', 'abc123');
+    expect(avatar.text).toBe('A');
+  });
+
+  it('falls back to pubkey prefix for names with no letters', () => {
+    const avatar = getContactAvatar('123 456', 'xyz789');
+    expect(avatar.text).toBe('XY');
+  });
+
+  it('returns consistent colors for same public key', () => {
+    const avatar1 = getContactAvatar('A', 'abc123def456');
+    const avatar2 = getContactAvatar('B', 'abc123def456');
+    expect(avatar1.background).toBe(avatar2.background);
+  });
+
+  it('returns different colors for different public keys', () => {
+    const avatar1 = getContactAvatar('A', 'abc123def456');
+    const avatar2 = getContactAvatar('A', 'xyz789uvw012');
+    expect(avatar1.background).not.toBe(avatar2.background);
+  });
 });
diff --git a/frontend/src/test/messageCache.test.ts b/frontend/src/test/messageCache.test.ts
index df8421c..3dc9f65 100644
--- a/frontend/src/test/messageCache.test.ts
+++ b/frontend/src/test/messageCache.test.ts
@@ -24,7 +24,7 @@ function createMessage(overrides: Partial<Message> = {}): Message {
   };
 }
 
-function createEntry(messages: Message[] = [], hasOlderMessages = false): messageCache.CacheEntry {
+function createEntry(messages: Message[] = [], hasOlderMessages = false) {
   const seenContent = new Set<string>();
   for (const msg of messages) {
     seenContent.add(`${msg.type}-${msg.conversation_key}-${msg.text}-${msg.sender_timestamp}`);
@@ -97,7 +97,6 @@ describe('messageCache', () => {
 
       const result = messageCache.get('conv1');
       expect(result!.messages[0].text).toBe('second');
-      expect(messageCache.size()).toBe(1);
     });
   });
 
@@ -231,7 +230,6 @@ describe('messageCache', () => {
       );
 
       expect(result).toBe(true);
-      expect(messageCache.size()).toBe(1);
       const entry = messageCache.get('new_conv');
       expect(entry).toBeDefined();
       expect(entry!.messages).toHaveLength(1);
@@ -319,13 +317,12 @@ describe('messageCache', () => {
 
       expect(messageCache.get('conv1')).toBeUndefined();
       expect(messageCache.get('conv2')).toBeDefined();
-      expect(messageCache.size()).toBe(1);
     });
 
     it('does nothing for non-existent key', () => {
       messageCache.set('conv1', createEntry());
       messageCache.remove('nonexistent');
-      expect(messageCache.size()).toBe(1);
+      expect(messageCache.get('conv1')).toBeDefined();
     });
   });
 
@@ -437,16 +434,4 @@ describe('messageCache', () => {
     });
   });
 
-  describe('clear', () => {
-    it('removes all entries', () => {
-      messageCache.set('conv1', createEntry());
-      messageCache.set('conv2', createEntry());
-      messageCache.set('conv3', createEntry());
-
-      messageCache.clear();
-
-      expect(messageCache.size()).toBe(0);
-      expect(messageCache.get('conv1')).toBeUndefined();
-    });
-  });
 });
diff --git a/frontend/src/test/pathUtils.test.ts b/frontend/src/test/pathUtils.test.ts
index 1469c21..07fb834 100644
--- a/frontend/src/test/pathUtils.test.ts
+++ b/frontend/src/test/pathUtils.test.ts
@@ -3,7 +3,6 @@ import {
   parsePathHops,
   findContactsByPrefix,
   calculateDistance,
-  sortContactsByDistance,
   resolvePath,
   formatDistance,
   formatHopCounts,
@@ -150,50 +149,6 @@ describe('calculateDistance', () => {
   });
 });
 
-describe('sortContactsByDistance', () => {
-  const contactClose = createContact({
-    public_key: 'AA' + 'A'.repeat(62),
-    name: 'Close',
-    lat: 40.7228,
-    lon: -74.006,
-  });
-  const contactFar = createContact({
-    public_key: 'BB' + 'B'.repeat(62),
-    name: 'Far',
-    lat: 40.9,
-    lon: -74.006,
-  });
-  const contactNoLocation = createContact({
-    public_key: 'CC' + 'C'.repeat(62),
-    name: 'NoLoc',
-    lat: null,
-    lon: null,
-  });
-
-  it('sorts by distance ascending', () => {
-    const sorted = sortContactsByDistance([contactFar, contactClose], 40.7128, -74.006);
-    expect(sorted[0].name).toBe('Close');
-    expect(sorted[1].name).toBe('Far');
-  });
-
-  it('places contacts without location at end', () => {
-    const sorted = sortContactsByDistance(
-      [contactNoLocation, contactClose, contactFar],
-      40.7128,
-      -74.006
-    );
-    expect(sorted[0].name).toBe('Close');
-    expect(sorted[1].name).toBe('Far');
-    expect(sorted[2].name).toBe('NoLoc');
-  });
-
-  it('returns unsorted if reference is null', () => {
-    const contacts = [contactFar, contactClose];
-    const sorted = sortContactsByDistance(contacts, null, -74.006);
-    expect(sorted[0].name).toBe(contacts[0].name);
-  });
-});
-
 describe('resolvePath', () => {
   const repeater1 = createContact({
     public_key: '1A' + 'A'.repeat(62),
diff --git a/frontend/src/test/settingsModal.test.tsx b/frontend/src/test/settingsModal.test.tsx
index 22fd424..2f108bc 100644
--- a/frontend/src/test/settingsModal.test.tsx
+++ b/frontend/src/test/settingsModal.test.tsx
@@ -10,7 +10,7 @@ import type {
   RadioConfigUpdate,
   StatisticsResponse,
 } from '../types';
-import type { SettingsSection } from '../components/SettingsModal';
+import type { SettingsSection } from '../components/settingsConstants';
 import {
   LAST_VIEWED_CONVERSATION_KEY,
   REOPEN_LAST_CONVERSATION_KEY,
diff --git a/frontend/src/test/urlHash.test.ts b/frontend/src/test/urlHash.test.ts
index c29fc1a..4255c0d 100644
--- a/frontend/src/test/urlHash.test.ts
+++ b/frontend/src/test/urlHash.test.ts
@@ -8,12 +8,11 @@
 import { describe, it, expect, beforeEach, afterEach } from 'vitest';
 import {
   parseHashConversation,
-  getConversationHash,
   getMapFocusHash,
   resolveChannelFromHashToken,
   resolveContactFromHashToken,
 } from '../utils/urlHash';
-import type { Channel, Contact, Conversation } from '../types';
+import type { Channel, Contact } from '../types';
 
 describe('parseHashConversation', () => {
   let originalHash: string;
@@ -147,122 +146,6 @@ describe('parseHashConversation', () => {
   });
 });
 
-describe('getConversationHash', () => {
-  it('returns empty string for null conversation', () => {
-    const result = getConversationHash(null);
-
-    expect(result).toBe('');
-  });
-
-  it('returns #raw for raw conversation', () => {
-    const conv: Conversation = { type: 'raw', id: 'raw', name: 'Raw Packet Feed' };
-
-    const result = getConversationHash(conv);
-
-    expect(result).toBe('#raw');
-  });
-
-  it('returns #map for map conversation', () => {
-    const conv: Conversation = { type: 'map', id: 'map', name: 'Node Map' };
-
-    const result = getConversationHash(conv);
-
-    expect(result).toBe('#map');
-  });
-
-  it('generates channel hash', () => {
-    const conv: Conversation = { type: 'channel', id: 'key123', name: 'Public' };
-
-    const result = getConversationHash(conv);
-
-    expect(result).toBe('#channel/key123/Public');
-  });
-
-  it('generates contact hash', () => {
-    const conv: Conversation = { type: 'contact', id: 'pubkey123', name: 'Alice' };
-
-    const result = getConversationHash(conv);
-
-    expect(result).toBe('#contact/pubkey123/Alice');
-  });
-
-  it('uses channel id even when name starts with #', () => {
-    const conv: Conversation = { type: 'channel', id: 'key123', name: '#TestChannel' };
-
-    const result = getConversationHash(conv);
-
-    expect(result).toBe('#channel/key123/TestChannel');
-  });
-
-  it('encodes special characters in ids', () => {
-    const conv: Conversation = { type: 'contact', id: 'key with space', name: 'John Doe' };
-
-    const result = getConversationHash(conv);
-
-    expect(result).toBe('#contact/key%20with%20space/John%20Doe');
-  });
-
-  it('uses id regardless of contact display name', () => {
-    const conv: Conversation = { type: 'contact', id: 'key', name: '#Hashtag' };
-
-    const result = getConversationHash(conv);
-
-    expect(result).toBe('#contact/key/%23Hashtag');
-  });
-});
-
-describe('parseHashConversation and getConversationHash roundtrip', () => {
-  let originalHash: string;
-
-  beforeEach(() => {
-    originalHash = window.location.hash;
-  });
-
-  afterEach(() => {
-    window.location.hash = originalHash;
-  });
-
-  it('channel roundtrip preserves data', () => {
-    const conv: Conversation = { type: 'channel', id: 'key123', name: 'Test Channel' };
-
-    const hash = getConversationHash(conv);
-    window.location.hash = hash;
-    const parsed = parseHashConversation();
-
-    expect(parsed).toEqual({ type: 'channel', name: 'key123', label: 'Test Channel' });
-  });
-
-  it('contact roundtrip preserves data', () => {
-    const conv: Conversation = { type: 'contact', id: 'pubkey', name: 'Alice Bob' };
-
-    const hash = getConversationHash(conv);
-    window.location.hash = hash;
-    const parsed = parseHashConversation();
-
-    expect(parsed).toEqual({ type: 'contact', name: 'pubkey', label: 'Alice Bob' });
-  });
-
-  it('raw roundtrip preserves type', () => {
-    const conv: Conversation = { type: 'raw', id: 'raw', name: 'Raw Packet Feed' };
-
-    const hash = getConversationHash(conv);
-    window.location.hash = hash;
-    const parsed = parseHashConversation();
-
-    expect(parsed).toEqual({ type: 'raw', name: 'raw' });
-  });
-
-  it('map roundtrip preserves type', () => {
-    const conv: Conversation = { type: 'map', id: 'map', name: 'Node Map' };
-
-    const hash = getConversationHash(conv);
-    window.location.hash = hash;
-    const parsed = parseHashConversation();
-
-    expect(parsed).toEqual({ type: 'map', name: 'map' });
-  });
-});
-
 describe('resolveChannelFromHashToken', () => {
   const channels: Channel[] = [
     {
diff --git a/frontend/src/test/useRepeaterMode.test.ts b/frontend/src/test/useRepeaterMode.test.ts
deleted file mode 100644
index 83765da..0000000
--- a/frontend/src/test/useRepeaterMode.test.ts
+++ /dev/null
@@ -1,241 +0,0 @@
-/**
- * Tests for useRepeaterMode hook utilities.
- *
- * These tests verify the formatting functions used to display
- * telemetry data from repeaters.
- */
-
-import { describe, it, expect } from 'vitest';
-import {
-  formatDuration,
-  formatTelemetry,
-  formatNeighbors,
-  formatAcl,
-} from '../hooks/useRepeaterMode';
-import type { TelemetryResponse, NeighborInfo, AclEntry } from '../types';
-
-describe('formatDuration', () => {
-  it('formats seconds under a minute', () => {
-    expect(formatDuration(0)).toBe('0s');
-    expect(formatDuration(30)).toBe('30s');
-    expect(formatDuration(59)).toBe('59s');
-  });
-
-  it('formats minutes only', () => {
-    expect(formatDuration(60)).toBe('1m');
-    expect(formatDuration(120)).toBe('2m');
-    expect(formatDuration(300)).toBe('5m');
-    expect(formatDuration(3599)).toBe('59m');
-  });
-
-  it('formats hours and minutes', () => {
-    expect(formatDuration(3600)).toBe('1h');
-    expect(formatDuration(3660)).toBe('1h1m');
-    expect(formatDuration(7200)).toBe('2h');
-    expect(formatDuration(7380)).toBe('2h3m');
-  });
-
-  it('formats days only', () => {
-    expect(formatDuration(86400)).toBe('1d');
-    expect(formatDuration(172800)).toBe('2d');
-  });
-
-  it('formats days and hours', () => {
-    expect(formatDuration(90000)).toBe('1d1h');
-    expect(formatDuration(97200)).toBe('1d3h');
-  });
-
-  it('formats days and minutes (no hours)', () => {
-    expect(formatDuration(86700)).toBe('1d5m');
-  });
-
-  it('formats days, hours, and minutes', () => {
-    expect(formatDuration(90060)).toBe('1d1h1m');
-    expect(formatDuration(148920)).toBe('1d17h22m');
-  });
-});
-
-describe('formatTelemetry', () => {
-  it('formats telemetry response with all fields', () => {
-    const telemetry: TelemetryResponse = {
-      pubkey_prefix: 'abc123',
-      battery_volts: 4.123,
-      uptime_seconds: 90060, // 1d1h1m
-      airtime_seconds: 3600, // 1h
-      rx_airtime_seconds: 7200, // 2h
-      noise_floor_dbm: -120,
-      last_rssi_dbm: -90,
-      last_snr_db: 8.5,
-      packets_received: 1000,
-      packets_sent: 500,
-      recv_flood: 800,
-      sent_flood: 400,
-      recv_direct: 200,
-      sent_direct: 100,
-      flood_dups: 50,
-      direct_dups: 10,
-      tx_queue_len: 2,
-      full_events: 0,
-      neighbors: [],
-      acl: [],
-      clock_output: null,
-    };
-
-    const result = formatTelemetry(telemetry);
-
-    expect(result).toContain('Telemetry');
-    expect(result).toContain('Battery Voltage: 4.123V');
-    expect(result).toContain('Uptime: 1d1h1m');
-    expect(result).toContain('TX Airtime: 1h');
-    expect(result).toContain('RX Airtime: 2h');
-    expect(result).toContain('Noise Floor: -120 dBm');
-    expect(result).toContain('Last RSSI: -90 dBm');
-    expect(result).toContain('Last SNR: 8.5 dB');
-    expect(result).toContain('Packets: 1,000 rx / 500 tx');
-    expect(result).toContain('Flood: 800 rx / 400 tx');
-    expect(result).toContain('Direct: 200 rx / 100 tx');
-    expect(result).toContain('Duplicates: 50 flood / 10 direct');
-    expect(result).toContain('TX Queue: 2');
-  });
-
-  it('formats battery voltage with 3 decimal places', () => {
-    const telemetry: TelemetryResponse = {
-      pubkey_prefix: 'abc123',
-      battery_volts: 3.7,
-      uptime_seconds: 0,
-      airtime_seconds: 0,
-      rx_airtime_seconds: 0,
-      noise_floor_dbm: 0,
-      last_rssi_dbm: 0,
-      last_snr_db: 0,
-      packets_received: 0,
-      packets_sent: 0,
-      recv_flood: 0,
-      sent_flood: 0,
-      recv_direct: 0,
-      sent_direct: 0,
-      flood_dups: 0,
-      direct_dups: 0,
-      tx_queue_len: 0,
-      full_events: 0,
-      neighbors: [],
-      acl: [],
-      clock_output: null,
-    };
-
-    const result = formatTelemetry(telemetry);
-    expect(result).toContain('Battery Voltage: 3.700V');
-  });
-});
-
-describe('formatNeighbors', () => {
-  it('returns "No neighbors" message for empty list', () => {
-    const result = formatNeighbors([]);
-
-    expect(result).toBe('Neighbors\nNo neighbors reported');
-  });
-
-  it('formats single neighbor', () => {
-    const neighbors: NeighborInfo[] = [
-      { pubkey_prefix: 'abc123', name: 'Alice', snr: 8.5, last_heard_seconds: 60 },
-    ];
-
-    const result = formatNeighbors(neighbors);
-
-    expect(result).toContain('Neighbors (1)');
-    expect(result).toContain('Alice, +8.5 dB [1m ago]');
-  });
-
-  it('sorts neighbors by SNR descending', () => {
-    const neighbors: NeighborInfo[] = [
-      { pubkey_prefix: 'aaa', name: 'Low', snr: -5, last_heard_seconds: 10 },
-      { pubkey_prefix: 'bbb', name: 'High', snr: 10, last_heard_seconds: 20 },
-      { pubkey_prefix: 'ccc', name: 'Mid', snr: 5, last_heard_seconds: 30 },
-    ];
-
-    const result = formatNeighbors(neighbors);
-    const lines = result.split('\n');
-
-    expect(lines[1]).toContain('High');
-    expect(lines[2]).toContain('Mid');
-    expect(lines[3]).toContain('Low');
-  });
-
-  it('uses pubkey_prefix when name is null', () => {
-    const neighbors: NeighborInfo[] = [
-      { pubkey_prefix: 'abc123def456', name: null, snr: 5, last_heard_seconds: 120 },
-    ];
-
-    const result = formatNeighbors(neighbors);
-
-    expect(result).toContain('abc123def456, +5.0 dB [2m ago]');
-  });
-
-  it('formats negative SNR without plus sign', () => {
-    const neighbors: NeighborInfo[] = [
-      { pubkey_prefix: 'abc', name: 'Test', snr: -3.5, last_heard_seconds: 60 },
-    ];
-
-    const result = formatNeighbors(neighbors);
-
-    expect(result).toContain('Test, -3.5 dB');
-  });
-
-  it('formats last heard in various durations', () => {
-    const neighbors: NeighborInfo[] = [
-      { pubkey_prefix: 'a', name: 'Seconds', snr: 0, last_heard_seconds: 45 },
-      { pubkey_prefix: 'b', name: 'Minutes', snr: 0, last_heard_seconds: 300 },
-      { pubkey_prefix: 'c', name: 'Hours', snr: 0, last_heard_seconds: 7200 },
-    ];
-
-    const result = formatNeighbors(neighbors);
-
-    expect(result).toContain('Seconds, +0.0 dB [45s ago]');
-    expect(result).toContain('Minutes, +0.0 dB [5m ago]');
-    expect(result).toContain('Hours, +0.0 dB [2h ago]');
-  });
-});
-
-describe('formatAcl', () => {
-  it('returns "No ACL entries" message for empty list', () => {
-    const result = formatAcl([]);
-
-    expect(result).toBe('ACL\nNo ACL entries');
-  });
-
-  it('formats single ACL entry', () => {
-    const acl: AclEntry[] = [
-      { pubkey_prefix: 'abc123', name: 'Alice', permission: 3, permission_name: 'Admin' },
-    ];
-
-    const result = formatAcl(acl);
-
-    expect(result).toContain('ACL (1)');
-    expect(result).toContain('Alice: Admin');
-  });
-
-  it('formats multiple ACL entries', () => {
-    const acl: AclEntry[] = [
-      { pubkey_prefix: 'aaa', name: 'Admin User', permission: 3, permission_name: 'Admin' },
-      { pubkey_prefix: 'bbb', name: 'Read Only', permission: 1, permission_name: 'Read-only' },
-      { pubkey_prefix: 'ccc', name: null, permission: 0, permission_name: 'Guest' },
-    ];
-
-    const result = formatAcl(acl);
-
-    expect(result).toContain('ACL (3)');
-    expect(result).toContain('Admin User: Admin');
-    expect(result).toContain('Read Only: Read-only');
-    expect(result).toContain('ccc: Guest');
-  });
-
-  it('uses pubkey_prefix when name is null', () => {
-    const acl: AclEntry[] = [
-      { pubkey_prefix: 'xyz789', name: null, permission: 2, permission_name: 'Read-write' },
-    ];
-
-    const result = formatAcl(acl);
-
-    expect(result).toContain('xyz789: Read-write');
-  });
-});
diff --git a/frontend/src/types.ts b/frontend/src/types.ts
index 898d4e5..f151ffe 100644
--- a/frontend/src/types.ts
+++ b/frontend/src/types.ts
@@ -1,4 +1,4 @@
-export interface RadioSettings {
+interface RadioSettings {
   freq: number;
   bw: number;
   sf: number;
@@ -99,7 +99,7 @@ export interface Message {
   acked: number;
 }
 
-export type ConversationType = 'contact' | 'channel' | 'raw' | 'map' | 'visualizer';
+type ConversationType = 'contact' | 'channel' | 'raw' | 'map' | 'visualizer';
 
 export interface Conversation {
   type: ConversationType;
@@ -228,13 +228,13 @@ export interface UnreadCounts {
   last_message_times: Record<string, number>;
 }
 
-export interface BusyChannel {
+interface BusyChannel {
   channel_key: string;
   channel_name: string;
   message_count: number;
 }
 
-export interface ContactActivityCounts {
+interface ContactActivityCounts {
   last_hour: number;
   last_24_hours: number;
   last_week: number;
diff --git a/frontend/src/utils/contactAvatar.ts b/frontend/src/utils/contactAvatar.ts
index bf1c8be..fa927cf 100644
--- a/frontend/src/utils/contactAvatar.ts
+++ b/frontend/src/utils/contactAvatar.ts
@@ -38,7 +38,7 @@ const emojiRegex =
  * 2. First letter + first letter after first space (initials)
  * 3. First letter only
  */
-export function getAvatarText(name: string | null, publicKey: string): string {
+function getAvatarText(name: string | null, publicKey: string): string {
   if (!name) {
     // Use first 2 chars of public key as fallback
     return publicKey.slice(0, 2).toUpperCase();
@@ -76,7 +76,7 @@ export function getAvatarText(name: string | null, publicKey: string): string {
  * Generate a consistent HSL color from a public key.
  * Uses saturation and lightness ranges that work well for backgrounds.
  */
-export function getAvatarColor(publicKey: string): {
+function getAvatarColor(publicKey: string): {
   background: string;
   text: string;
 } {
diff --git a/frontend/src/utils/pathUtils.ts b/frontend/src/utils/pathUtils.ts
index 76bcb58..712a2b5 100644
--- a/frontend/src/utils/pathUtils.ts
+++ b/frontend/src/utils/pathUtils.ts
@@ -123,7 +123,7 @@ export function formatDistance(km: number): string {
  * Sort contacts by distance from a reference point
  * Contacts without location are placed at the end
  */
-export function sortContactsByDistance(
+function sortContactsByDistance(
   contacts: Contact[],
   fromLat: number | null,
   fromLon: number | null
diff --git a/frontend/src/utils/radioPresets.ts b/frontend/src/utils/radioPresets.ts
index 7d70f12..fcdb597 100644
--- a/frontend/src/utils/radioPresets.ts
+++ b/frontend/src/utils/radioPresets.ts
@@ -1,5 +1,5 @@
 // Radio presets for common LoRa configurations
-export interface RadioPreset {
+interface RadioPreset {
   name: string;
   freq: number;
   bw: number;
diff --git a/frontend/src/utils/urlHash.ts b/frontend/src/utils/urlHash.ts
index dede798..667cd45 100644
--- a/frontend/src/utils/urlHash.ts
+++ b/frontend/src/utils/urlHash.ts
@@ -102,7 +102,7 @@ export function getMapFocusHash(publicKeyPrefix: string): string {
 }
 
 // Generate URL hash from conversation
-export function getConversationHash(conv: Conversation | null): string {
+function getConversationHash(conv: Conversation | null): string {
   if (!conv) return '';
   if (conv.type === 'raw') return '#raw';
   if (conv.type === 'map') return '#map';
diff --git a/frontend/src/utils/visualizerUtils.ts b/frontend/src/utils/visualizerUtils.ts
index e9659f5..a4434d3 100644
--- a/frontend/src/utils/visualizerUtils.ts
+++ b/frontend/src/utils/visualizerUtils.ts
@@ -6,7 +6,7 @@ import { CONTACT_TYPE_REPEATER, type Contact, type RawPacket } from '../types';
 // =============================================================================
 
 export type NodeType = 'self' | 'repeater' | 'client';
-export type PacketLabel = 'AD' | 'GT' | 'DM' | 'ACK' | 'TR' | 'RQ' | 'RS' | '?';
+type PacketLabel = 'AD' | 'GT' | 'DM' | 'ACK' | 'TR' | 'RQ' | 'RS' | '?';
 
 export interface Particle {
   linkKey: string;
@@ -18,7 +18,7 @@ export interface Particle {
   toNodeId: string;
 }
 
-export interface ObservedPath {
+interface ObservedPath {
   nodes: string[];
   snr: number | null;
   timestamp: number;
@@ -32,7 +32,7 @@ export interface PendingPacket {
   expiresAt: number;
 }
 
-export interface ParsedPacket {
+interface ParsedPacket {
   payloadType: number;
   messageHash: string | null;
   pathBytes: string[];
@@ -44,7 +44,7 @@ export interface ParsedPacket {
 }
 
 // Traffic pattern tracking for smarter repeater disambiguation
-export interface TrafficObservation {
+interface TrafficObservation {
   source: string; // Node that originated traffic (could be resolved node ID or ambiguous)
   nextHop: string | null; // Next hop after this repeater (null if final hop before self)
   timestamp: number;
@@ -56,7 +56,7 @@ export interface RepeaterTrafficData {
 }
 
 // Analysis result for whether to split an ambiguous repeater
-export interface RepeaterSplitAnalysis {
+interface RepeaterSplitAnalysis {
   shouldSplit: boolean;
   // If shouldSplit, maps nextHop -> the sources that exclusively route through it
   disjointGroups: Map<string, Set<string>> | null;
@@ -95,9 +95,9 @@ export const PARTICLE_SPEED = 0.008;
 export const DEFAULT_OBSERVATION_WINDOW_SEC = 15;
 // Traffic pattern analysis thresholds
 // Be conservative - once split, we can't unsplit, so require strong evidence
-export const MIN_OBSERVATIONS_TO_SPLIT = 20; // Need at least this many unique sources per next-hop group
-export const MAX_TRAFFIC_OBSERVATIONS = 200; // Per ambiguous prefix, to limit memory
-export const TRAFFIC_OBSERVATION_MAX_AGE_MS = 30 * 60 * 1000; // 30 minutes - old observations are pruned
+const MIN_OBSERVATIONS_TO_SPLIT = 20; // Need at least this many unique sources per next-hop group
+const MAX_TRAFFIC_OBSERVATIONS = 200; // Per ambiguous prefix, to limit memory
+const TRAFFIC_OBSERVATION_MAX_AGE_MS = 30 * 60 * 1000; // 30 minutes - old observations are pruned
 
 export const PACKET_LEGEND_ITEMS = [
   { label: 'AD', color: COLORS.particleAD, description: 'Advertisement' },
@@ -114,7 +114,7 @@ export const PACKET_LEGEND_ITEMS = [
 // UTILITY FUNCTIONS (Data Layer)
 // =============================================================================
 
-export function simpleHash(str: string): string {
+function simpleHash(str: string): string {
   let hash = 0;
   for (let i = 0; i < str.length; i++) {
     hash = (hash << 5) - hash + str.charCodeAt(i);