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/connection_provider.dart

@@ -123,6 +123,7 @@ class ConnectionProvider with ChangeNotifier {
   Function(List<Contact>)? onContactsComplete;
   Function(Message)? onMessageReceived;
   Function(Uint8List publicKey, Uint8List lppData)? onTelemetryReceived;
+  Function(int channelIdx, String channelName)? onChannelInfoReceived;
   Function(Uint8List publicKeyPrefix, int tag, Uint8List responseData)?
   onBinaryResponse;
   Function(Uint8List publicKey)? onPathUpdated;
@@ -249,6 +250,10 @@ class ConnectionProvider with ChangeNotifier {
       onContactsComplete?.call(contacts);
     };
 
+    _bleService.onChannelInfoReceived = (channelIdx, channelName) {
+      onChannelInfoReceived?.call(channelIdx, channelName);
+    };
+
     _bleService.onMessageReceived = (message) {
       // Parse SAR markers
       final enhancedMessage = SarMessageParser.enhanceMessage(message);
@@ -628,6 +633,24 @@ class ConnectionProvider with ChangeNotifier {
     }
   }
 
+  /// Sync all channels from device
+  Future<void> syncChannels({int? maxChannels}) async {
+    if (!_bleService.isConnected) {
+      _error = 'Not connected to device';
+      notifyListeners();
+      return;
+    }
+
+    try {
+      // Use maxChannels from device info if available, otherwise default to 40
+      final channelCount = maxChannels ?? _deviceInfo.maxChannels ?? 40;
+      await _bleService.syncAllChannels(maxChannels: channelCount);
+    } catch (e) {
+      _error = 'Failed to sync channels: $e';
+      notifyListeners();
+    }
+  }
+
   /// Add or update a contact on the companion radio
   ///
   /// This manually adds a contact to the radio's internal contact table.