Refactor Cayenne LPP parsing with error handling and logging

- Added error handling and logging to the Cayenne LPP parsing methods to manage malformed data gracefully.
- Improved the structure of the parsing logic for better readability and maintainability.
- Updated the Contact model to include error handling during frame parsing.
- Refactored Channels, Contacts, Map, and Neighbours screens to utilize a new AppBarTitle widget for consistent app bar design.
- Enhanced the BatteryIndicator widget to display SNR information for direct repeaters.
- Introduced SNRUi class for better management of SNR icon and text representation.
- Improved error handling in PathTraceMap and Neighbours screens to log errors appropriately.

lib/screens/channels_screen.dart

@@ -3,6 +3,7 @@ import 'dart:math';
 import 'dart:typed_data';
 
 import 'package:flutter/material.dart';
+import 'package:meshcore_open/widgets/app_bar.dart';
 import 'package:provider/provider.dart';
 import 'package:uuid/uuid.dart';
 
@@ -14,7 +15,6 @@ import '../storage/community_store.dart';
 import '../utils/dialog_utils.dart';
 import '../utils/disconnect_navigation_mixin.dart';
 import '../utils/route_transitions.dart';
-import '../widgets/battery_indicator.dart';
 import '../widgets/list_filter_widget.dart';
 import '../widgets/empty_state.dart';
 import '../widgets/qr_code_display.dart';
@@ -116,8 +116,7 @@ class _ChannelsScreenState extends State<ChannelsScreen>
       canPop: allowBack,
       child: Scaffold(
         appBar: AppBar(
-          leading: BatteryIndicator(connector: connector),
-          title: Text(context.l10n.channels_title),
+          title: AppBarTitle(context.l10n.channels_title, null),
           centerTitle: true,
           automaticallyImplyLeading: false,
           actions: [