Implement favorites, notifications, and improve fragment handling

- Add favorites functionality for peers with persistent storage
  - Star icon to toggle favorites in sidebar
  - Favorites appear at top of peer list
  - Storage persists across app launches using peer ID

- Add local notifications for mentions and private messages
  - Notifications appear when app is in background
  - Separate notification types for mentions vs private messages
  - Request notification permissions on app launch

- Fix sidebar header alignment to match main toolbar (44pt)
  - Add background color to sidebar header for visual consistency

- Improve voice note fragment transmission
  - Send fragments in batches of 5 with delays to prevent congestion
  - Better logging to debug fragment transmission issues
  - Reduce delay between fragments from 50ms to batch-based timing

- Fix other UI issues
  - Ensure mic recording ripples originate from mic button
  - Update sidebar to swipe from right edge smoothly

bitchat/Info.plist

@@ -28,16 +28,16 @@
 	<string>bitchat uses Bluetooth to discover and connect with other bitchat users nearby.</string>
 	<key>NSMicrophoneUsageDescription</key>
 	<string>bitchat needs access to your microphone to record voice notes.</string>
-	<key>UILaunchScreen</key>
-	<dict>
-		<key>UIColorName</key>
-		<string>Black</string>
-	</dict>
 	<key>UIBackgroundModes</key>
 	<array>
 		<string>bluetooth-central</string>
 		<string>bluetooth-peripheral</string>
 	</array>
+	<key>UILaunchScreen</key>
+	<dict>
+		<key>UIColorName</key>
+		<string>Black</string>
+	</dict>
 	<key>UISupportedInterfaceOrientations</key>
 	<array>
 		<string>UIInterfaceOrientationPortrait</string>