fix: address analysis issues - remove unused import, fix deprecated APIs, update test

lib/bridge/location_bridge.dart

@@ -2,10 +2,12 @@ import 'dart:async';
 import 'package:flutter/services.dart';
 
 class LocationBridge {
-  static const MethodChannel _methodChannel =
-      MethodChannel('com.traccar.client/tracking');
-  static const EventChannel _eventChannel =
-      EventChannel('com.traccar.client/location_updates');
+  static const MethodChannel _methodChannel = MethodChannel(
+    'com.traccar.client/tracking',
+  );
+  static const EventChannel _eventChannel = EventChannel(
+    'com.traccar.client/location_updates',
+  );
 
   static Stream<Map<String, dynamic>>? _locationStream;
 
@@ -31,8 +33,10 @@ class LocationBridge {
 
   static Future<bool> updateConfig(Map<String, dynamic> config) async {
     try {
-      final result =
-          await _methodChannel.invokeMethod<bool>('updateConfig', config);
+      final result = await _methodChannel.invokeMethod<bool>(
+        'updateConfig',
+        config,
+      );
       return result ?? false;
     } on PlatformException catch (e) {
       print('Failed to update config: ${e.message}');
@@ -51,9 +55,9 @@ class LocationBridge {
   }
 
   static Stream<Map<String, dynamic>> get locationUpdates {
-    _locationStream ??= _eventChannel
-        .receiveBroadcastStream()
-        .map((event) => Map<String, dynamic>.from(event as Map));
+    _locationStream ??= _eventChannel.receiveBroadcastStream().map(
+      (event) => Map<String, dynamic>.from(event as Map),
+    );
     return _locationStream!;
   }
 }

lib/main.dart

@@ -19,11 +19,9 @@ class TraccarClientApp extends StatelessWidget {
       theme: ThemeData(
         useMaterial3: true,
         colorScheme: ColorScheme.fromSeed(seedColor: Colors.blue),
-        appBarTheme: const AppBarTheme(
-          centerTitle: true,
-        ),
+        appBarTheme: const AppBarTheme(centerTitle: true),
       ),
       home: const MainScreen(),
     );
   }
-}
+}

lib/main_screen.dart

@@ -1,6 +1,5 @@
 import 'package:flutter/material.dart';
 import 'package:traccar_client/bridge/location_bridge.dart';
-import 'package:traccar_client/preferences.dart';
 import 'package:traccar_client/settings_screen.dart';
 import 'package:traccar_client/status_screen.dart';
 
@@ -34,7 +33,9 @@ class _MainScreenState extends State<MainScreen> {
               ? '${(location['speed'] * 3.6).toStringAsFixed(0)} km/h'
               : '--';
           _lastTime = location['timestamp'] != null
-              ? _formatTime(DateTime.fromMillisecondsSinceEpoch(location['timestamp']))
+              ? _formatTime(
+                  DateTime.fromMillisecondsSinceEpoch(location['timestamp']),
+                )
               : '--';
         });
       }
@@ -59,10 +60,7 @@ class _MainScreenState extends State<MainScreen> {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-      appBar: AppBar(
-        title: const Text('Traccar Client'),
-        centerTitle: true,
-      ),
+      appBar: AppBar(title: const Text('Traccar Client'), centerTitle: true),
       body: Padding(
         padding: const EdgeInsets.all(16.0),
         child: Column(
@@ -117,10 +115,12 @@ class _MainScreenState extends State<MainScreen> {
   Widget _buildTrackingToggle() {
     return SwitchListTile(
       title: Text(_isTracking ? 'Tracking: ON' : 'Tracking: OFF'),
-      subtitle: Text(_isTracking ? 'Location updates active' : 'Tap to start tracking'),
+      subtitle: Text(
+        _isTracking ? 'Location updates active' : 'Tap to start tracking',
+      ),
       value: _isTracking,
       onChanged: (_) => _toggleTracking(),
-      activeColor: Colors.green,
+      activeTrackColor: Colors.green,
     );
   }
 
@@ -148,7 +148,7 @@ class _MainScreenState extends State<MainScreen> {
                 MaterialPageRoute(builder: (_) => const StatusScreen()),
               );
             },
-            icon: const Icon(Icons.logs),
+            icon: const Icon(Icons.history),
             label: const Text('Status/Logs'),
           ),
         ),

lib/preferences.dart

@@ -21,7 +21,9 @@ class Preferences {
 
   static SharedPreferences get instance {
     if (_instance == null) {
-      throw Exception('Preferences not initialized. Call Preferences.init() first.');
+      throw Exception(
+        'Preferences not initialized. Call Preferences.init() first.',
+      );
     }
     return _instance!;
   }
@@ -100,4 +102,4 @@ class Preferences {
     instance.setString(keyDeviceId, deviceId);
     return deviceId;
   }
-}
+}

lib/settings_screen.dart

@@ -66,18 +66,16 @@ class _SettingsScreenState extends State<SettingsScreen> {
     });
 
     if (mounted) {
-      ScaffoldMessenger.of(context).showSnackBar(
-        const SnackBar(content: Text('Settings saved')),
-      );
+      ScaffoldMessenger.of(
+        context,
+      ).showSnackBar(const SnackBar(content: Text('Settings saved')));
     }
   }
 
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-      appBar: AppBar(
-        title: const Text('Settings'),
-      ),
+      appBar: AppBar(title: const Text('Settings')),
       body: ListView(
         padding: const EdgeInsets.all(16),
         children: [
@@ -120,15 +118,18 @@ class _SettingsScreenState extends State<SettingsScreen> {
       padding: const EdgeInsets.only(top: 16, bottom: 8),
       child: Text(
         title,
-        style: Theme.of(context).textTheme.titleMedium?.copyWith(
-              fontWeight: FontWeight.bold,
-            ),
+        style: Theme.of(
+          context,
+        ).textTheme.titleMedium?.copyWith(fontWeight: FontWeight.bold),
       ),
     );
   }
 
-  Widget _buildTextField(String label, TextEditingController controller,
-      {bool obscure = false}) {
+  Widget _buildTextField(
+    String label,
+    TextEditingController controller, {
+    bool obscure = false,
+  }) {
     return TextField(
       controller: controller,
       decoration: InputDecoration(labelText: label),
@@ -176,4 +177,4 @@ class _SettingsScreenState extends State<SettingsScreen> {
       },
     );
   }
-}
+}

lib/status_screen.dart

@@ -6,9 +6,7 @@ class StatusScreen extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-      appBar: AppBar(
-        title: const Text('Event Log'),
-      ),
+      appBar: AppBar(title: const Text('Event Log')),
       body: ListView(
         padding: const EdgeInsets.all(16),
         children: [
@@ -31,10 +29,7 @@ class StatusScreen extends StatelessWidget {
   Widget _buildPlaceholderEvent(String type, String detail, String extra) {
     return Card(
       child: ListTile(
-        leading: Icon(
-          _getIconForType(type),
-          color: _getColorForType(type),
-        ),
+        leading: Icon(_getIconForType(type), color: _getColorForType(type)),
         title: Text(type),
         subtitle: Text('$detail $extra'.trim()),
       ),
@@ -74,4 +69,4 @@ class StatusScreen extends StatelessWidget {
         return Colors.grey;
     }
   }
-}
+}