feat: Implement command queue for BLE command handling

- Added BleCommandQueue to manage command serialization and responses in BleCommandSender.
- Updated writeData, writeDataAndWaitForAck, and writeDataAndWaitForResponse methods to utilize the command queue.
- Enhanced BleResponseHandler to complete commands based on responses received from the BLE device.
- Introduced new commands for channel management, including getChannel and setChannel.
- Created LocationTrailLayer and TrailControls widgets for displaying and managing location trails on the map.
- Added PermissionRequestDialog to handle location permission requests on app startup.
- Updated LocationTrackingService to allow GPS tracking without a BLE connection.

lib/providers/app_provider.dart

@@ -5,6 +5,7 @@ import 'connection_provider.dart';
 import 'contacts_provider.dart';
 import 'messages_provider.dart';
 import 'drawing_provider.dart';
+import 'channels_provider.dart';
 import '../services/tile_cache_service.dart';
 import '../services/location_tracking_service.dart';
 import '../models/contact.dart';
@@ -16,6 +17,7 @@ class AppProvider with ChangeNotifier {
   final ContactsProvider contactsProvider;
   final MessagesProvider messagesProvider;
   final DrawingProvider drawingProvider;
+  final ChannelsProvider channelsProvider;
   final TileCacheService tileCacheService;
   final LocationTrackingService locationTrackingService = LocationTrackingService();
 
@@ -27,6 +29,7 @@ class AppProvider with ChangeNotifier {
     required this.contactsProvider,
     required this.messagesProvider,
     required this.drawingProvider,
+    required this.channelsProvider,
     required this.tileCacheService,
   }) {
     _setupCallbacks();
@@ -97,6 +100,12 @@ class AppProvider with ChangeNotifier {
       debugPrint('Received ${contacts.length} contacts');
     };
 
+    // When channel info is received
+    connectionProvider.onChannelInfoReceived = (channelIdx, channelName) {
+      channelsProvider.addOrUpdateChannel(channelIdx, channelName);
+      debugPrint('📻 [AppProvider] Channel $channelIdx: "$channelName"');
+    };
+
     // When a message is received
     connectionProvider.onMessageReceived = (message) {
       // Check if message is a drawing broadcast
@@ -242,6 +251,11 @@ class AppProvider with ChangeNotifier {
       // Small delay to ensure contacts are fully loaded
       await Future.delayed(const Duration(milliseconds: 500));
 
+      // Sync all channels to get channel names
+      debugPrint('📻 [AppProvider] Syncing channels...');
+      await connectionProvider.syncChannels();
+      debugPrint('✅ [AppProvider] Channel sync complete');
+
       // Automatically login to all saved rooms
       await _autoLoginToRooms();
 
@@ -253,6 +267,10 @@ class AppProvider with ChangeNotifier {
 
       // Note: Future messages are synced automatically via PUSH_CODE_MSG_WAITING events
 
+      // Start location tracking AFTER all initialization is complete
+      debugPrint('📍 [AppProvider] Starting location tracking after successful initialization');
+      await _startLocationTracking();
+
       notifyListeners();
     } catch (e) {
       debugPrint('Initialization error: $e');
@@ -395,11 +413,9 @@ class AppProvider with ChangeNotifier {
     final isConnected = connectionProvider.deviceInfo.isConnected;
     final wasTracking = locationTrackingService.isTracking;
 
-    if (isConnected && !wasTracking) {
-      // Connection established - start location tracking
-      debugPrint('🔵 [AppProvider] BLE connected - starting location tracking');
-      _startLocationTracking();
-    } else if (!isConnected && wasTracking) {
+    // Only stop tracking on disconnect - DON'T start on connect
+    // Location tracking will be started AFTER initialization completes
+    if (!isConnected && wasTracking) {
       // Connection lost - stop location tracking
       debugPrint('🔴 [AppProvider] BLE disconnected - stopping location tracking');
       _stopLocationTracking();