Update dependencies and improve code consistency across multiple files

lib/screens/app_debug_log_screen.dart

@@ -55,7 +55,7 @@ class AppDebugLogScreen extends StatelessWidget {
             child: hasEntries
                 ? ListView.separated(
                     itemCount: entries.length,
-                    separatorBuilder: (_, __) => const Divider(height: 1),
+                    separatorBuilder: (_, _) => const Divider(height: 1),
                     itemBuilder: (context, index) {
                       final entry = entries[index];
                       return ListTile(

lib/screens/ble_debug_log_screen.dart

@@ -100,7 +100,7 @@ class _BleDebugLogScreenState extends State<BleDebugLogScreen> {
                           itemCount: showingFrames
                               ? entries.length
                               : rawEntries.length,
-                          separatorBuilder: (_, __) => const Divider(height: 1),
+                          separatorBuilder: (_, _) => const Divider(height: 1),
                           itemBuilder: (context, index) {
                             if (showingFrames) {
                               final entry = entries[index];

lib/screens/channel_message_path_screen.dart

@@ -594,7 +594,7 @@ class _ChannelMessagePathMapScreenState
                     : ListView.separated(
                         padding: const EdgeInsets.symmetric(vertical: 4),
                         itemCount: hops.length,
-                        separatorBuilder: (_, __) => const Divider(height: 1),
+                        separatorBuilder: (_, _) => const Divider(height: 1),
                         itemBuilder: (context, index) {
                           final hop = hops[index];
                           return ListTile(

lib/screens/path_trace_map.dart

@@ -530,7 +530,7 @@ class _PathTraceMapScreenState extends State<PathTraceMapScreen> {
                         child: ListView.separated(
                           padding: const EdgeInsets.symmetric(vertical: 4),
                           itemCount: pathTraceData.pathData.length + 1,
-                          separatorBuilder: (_, __) => const Divider(height: 1),
+                          separatorBuilder: (_, _) => const Divider(height: 1),
                           itemBuilder: (context, index) {
                             return Column(
                               children: [

lib/screens/settings_screen.dart

@@ -742,7 +742,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
     );
   }
 
-  _gpxExport(
+  Future<void> _gpxExport(
     GpxExport exporter,
     String name,
     String description,
@@ -782,7 +782,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
     }
   }
 
-  _buildExportCard(MeshCoreConnector connector) {
+  Widget _buildExportCard(MeshCoreConnector connector) {
     final l10n = context.l10n;
     return Card(
       child: Column(

lib/services/background_service.dart

@@ -1,4 +1,3 @@
-import 'dart:isolate';
 import 'dart:io';
 
 import 'package:flutter_foreground_task/flutter_foreground_task.dart';
@@ -15,18 +14,13 @@ class BackgroundService {
         channelDescription: 'Keeps MeshCore running in the background.',
         channelImportance: NotificationChannelImportance.LOW,
         priority: NotificationPriority.LOW,
-        iconData: const NotificationIconData(
-          resType: ResourceType.mipmap,
-          resPrefix: ResourcePrefix.ic,
-          name: 'launcher',
-        ),
       ),
       iosNotificationOptions: const IOSNotificationOptions(
         showNotification: false,
         playSound: false,
       ),
-      foregroundTaskOptions: const ForegroundTaskOptions(
-        interval: 5000,
+      foregroundTaskOptions: ForegroundTaskOptions(
+        eventAction: ForegroundTaskEventAction.repeat(5000),
         autoRunOnBoot: false,
         allowWifiLock: false,
       ),
@@ -63,13 +57,13 @@ void startCallback() {
 
 class _MeshCoreTaskHandler extends TaskHandler {
   @override
-  void onStart(DateTime timestamp, SendPort? sendPort) {}
+  Future<void> onStart(DateTime timestamp, TaskStarter starter) async {}
 
   @override
-  void onRepeatEvent(DateTime timestamp, SendPort? sendPort) {}
+  void onRepeatEvent(DateTime timestamp) {}
 
   @override
-  void onDestroy(DateTime timestamp, SendPort? sendPort) {}
+  Future<void> onDestroy(DateTime timestamp, bool isTimeout) async {}
 
   @override
   void onNotificationButtonPressed(String id) {}

lib/services/notification_service.dart

@@ -67,7 +67,7 @@ class NotificationService {
 
     try {
       await _notifications.initialize(
-        initSettings,
+        settings: initSettings,
         onDidReceiveNotificationResponse: _onNotificationTapped,
       );
       _isInitialized = true;
@@ -149,10 +149,10 @@ class NotificationService {
     );
 
     await _notifications.show(
-      contactId?.hashCode ?? 0,
-      contactName,
-      message,
-      notificationDetails,
+      id: contactId?.hashCode ?? 0,
+      title: contactName,
+      body: message,
+      notificationDetails: notificationDetails,
       payload: 'message:$contactId',
     );
   }
@@ -194,10 +194,10 @@ class NotificationService {
     );
 
     await _notifications.show(
-      contactId?.hashCode ?? DateTime.now().millisecondsSinceEpoch,
-      _l10n.notification_newTypeDiscovered(contactType),
-      contactName,
-      notificationDetails,
+      id: contactId?.hashCode ?? DateTime.now().millisecondsSinceEpoch,
+      title: _l10n.notification_newTypeDiscovered(contactType),
+      body: contactName,
+      notificationDetails: notificationDetails,
       payload: 'advert:$contactId',
     );
   }
@@ -248,10 +248,10 @@ class NotificationService {
         : preview;
 
     await _notifications.show(
-      channelIndex?.hashCode ?? DateTime.now().millisecondsSinceEpoch,
-      channelName,
-      body,
-      notificationDetails,
+      id: channelIndex?.hashCode ?? DateTime.now().millisecondsSinceEpoch,
+      title: channelName,
+      body: body,
+      notificationDetails: notificationDetails,
       payload: 'channel:$channelIndex',
     );
   }
@@ -285,7 +285,7 @@ class NotificationService {
   }
 
   Future<void> cancel(int id) async {
-    await _notifications.cancel(id);
+    await _notifications.cancel(id: id);
   }
 
   // ─────────────────────────────────────────────────────────────────
@@ -469,10 +469,10 @@ class NotificationService {
     const notificationDetails = NotificationDetails(android: androidDetails);
 
     await _notifications.show(
-      'batch_summary'.hashCode,
-      _l10n.notification_activityTitle,
-      parts.join(', '),
-      notificationDetails,
+      id: 'batch_summary'.hashCode,
+      title: _l10n.notification_activityTitle,
+      body: parts.join(', '),
+      notificationDetails: notificationDetails,
       payload: 'batch',
     );
   }

lib/widgets/qr_scanner_widget.dart

@@ -156,7 +156,7 @@ class _QrScannerWidgetState extends State<QrScannerWidget>
         MobileScanner(
           controller: _controller,
           onDetect: _handleDetection,
-          errorBuilder: (context, error, child) {
+          errorBuilder: (context, error) {
             return _buildErrorWidget(context, error);
           },
         ),