fix: permission screen - location tap opens settings when permanently denied, battery dialog re-checks on done

lib/bridge/location_bridge.dart

@@ -104,4 +104,16 @@ class LocationBridge {
       return false;
     }
   }
+
+  static Future<bool> isBatteryOptimizationDisabled() async {
+    try {
+      final result = await _methodChannel.invokeMethod<bool>(
+        'isBatteryOptimizationDisabled',
+      );
+      return result ?? false;
+    } on PlatformException catch (e) {
+      debugPrint('Failed to check battery optimization: ${e.message}');
+      return false;
+    }
+  }
 }

lib/permission_screen.dart

@@ -32,7 +32,6 @@ class _PermissionScreenState extends State<PermissionScreen> {
   Future<void> _checkPermissions() async {
     final location = await Permission.locationAlways.status;
     final notification = await Permission.notification.status;
-    // Battery optimization check is Android-only
     final batteryOptOut = await _isBatteryOptimizationDisabled();
 
     if (mounted) {
@@ -45,10 +44,12 @@ class _PermissionScreenState extends State<PermissionScreen> {
   }
 
   Future<bool> _isBatteryOptimizationDisabled() async {
-    // On Android, check if battery optimization is disabled for the app
-    // We approximate this - in production you'd use a native method
-    // For now, assume not granted until user says so
-    return false;
+    try {
+      final result = await LocationBridge.isBatteryOptimizationDisabled();
+      return result == true;
+    } catch (_) {
+      return false;
+    }
   }
 
   bool get _allGranted =>
@@ -56,32 +57,39 @@ class _PermissionScreenState extends State<PermissionScreen> {
 
   Future<void> _requestLocation() async {
     final status = await Permission.locationAlways.request();
+    if (!status.isGranted && status.isPermanentlyDenied) {
+      // Permission permanently denied - open app settings
+      await openAppSettings();
+    }
     if (mounted) {
-      setState(() => _locationGranted = status.isGranted);
+      final newStatus = await Permission.locationAlways.status;
+      setState(() => _locationGranted = newStatus.isGranted);
     }
   }
 
   Future<void> _requestNotification() async {
     final status = await Permission.notification.request();
+    if (!status.isGranted && status.isPermanentlyDenied) {
+      await openAppSettings();
+    }
     if (mounted) {
-      setState(() => _notificationGranted = status.isGranted);
+      final newStatus = await Permission.notification.status;
+      setState(() => _notificationGranted = newStatus.isGranted);
     }
   }
 
   Future<void> _requestBatteryOptOut() async {
-    final success = await LocationBridge.openBatteryOptimizationSettings();
-    if (success) {
-      // Show dialog asking user to confirm after disabling battery opt
-      if (mounted) _showBatteryOptDialog();
-    } else {
-      // Fallback to manual instructions dialog
-      if (mounted) _showBatteryOptDialog();
+    final opened = await LocationBridge.openBatteryOptimizationSettings();
+    if (mounted) {
+      // Show dialog after the settings screen opens
+      _showBatteryOptDialog(opened);
     }
   }
 
-  void _showBatteryOptDialog() {
+  void _showBatteryOptDialog(bool settingsOpened) {
     showDialog(
       context: context,
+      barrierDismissible: false,
       builder: (ctx) => AlertDialog(
         backgroundColor: const Color(0xFF1a1a1a),
         shape: RoundedRectangleBorder(
@@ -98,10 +106,12 @@ class _PermissionScreenState extends State<PermissionScreen> {
             color: Color(0xFFe0e0e0),
           ),
         ),
-        content: const Text(
-          'Please disable battery optimization for this app to ensure reliable background tracking.\n\n'
-          'In the next screen, find "Traccar Client" and set it to "Don\'t optimize" or "Unrestricted".',
-          style: TextStyle(
+        content: Text(
+          settingsOpened
+              ? 'A settings screen has opened.\n\n'
+                    'Find "Traccar Client" and set it to "Don\'t optimize" or "Unrestricted", then come back and tap DONE below.'
+              : 'Open Settings → Apps → Traccar Client → Battery and select "Don\'t optimize" or "Unrestricted", then come back and tap DONE below.',
+          style: const TextStyle(
             fontFamily: 'monospace',
             fontSize: 12,
             color: Color(0xFF9e9e9e),
@@ -109,9 +119,13 @@ class _PermissionScreenState extends State<PermissionScreen> {
         ),
         actions: [
           TextButton(
-            onPressed: () => Navigator.pop(ctx),
+            onPressed: () {
+              Navigator.pop(ctx);
+              // Open app details settings as fallback
+              openAppSettings();
+            },
             child: const Text(
-              'OPEN SETTINGS',
+              'OPEN APP SETTINGS',
               style: TextStyle(
                 fontFamily: 'monospace',
                 fontSize: 11,
@@ -122,12 +136,16 @@ class _PermissionScreenState extends State<PermissionScreen> {
             ),
           ),
           TextButton(
-            onPressed: () {
+            onPressed: () async {
               Navigator.pop(ctx);
-              setState(() => _batteryOptOut = true);
+              // Re-check battery optimization state via native
+              final disabled = await _isBatteryOptimizationDisabled();
+              if (mounted) {
+                setState(() => _batteryOptOut = disabled);
+              }
             },
             child: const Text(
-              'DONE',
+              'CHECK & DONE',
               style: TextStyle(
                 fontFamily: 'monospace',
                 fontSize: 11,
@@ -213,11 +231,11 @@ class _PermissionScreenState extends State<PermissionScreen> {
         color: Color(0xFF161616),
         border: Border(bottom: BorderSide(color: Color(0xFF2a2a2a), width: 1)),
       ),
-      child: Row(
+      child: const Row(
         children: [
-          const Icon(Icons.shield, color: Color(0xFF00bcd4), size: 20),
-          const SizedBox(width: 12),
-          const Text(
+          Icon(Icons.shield, color: Color(0xFF00bcd4), size: 20),
+          SizedBox(width: 12),
+          Text(
             'PERMISSIONS',
             style: TextStyle(
               fontFamily: 'monospace',
@@ -245,18 +263,18 @@ class _PermissionScreenState extends State<PermissionScreen> {
           Container(
             width: 40,
             height: 40,
-            decoration: BoxDecoration(
-              color: const Color(0xFF00bcd4).withOpacity(0.15),
-              borderRadius: BorderRadius.circular(4),
+            decoration: const BoxDecoration(
+              color: Color(0xFF00bcd4),
+              borderRadius: BorderRadius.all(Radius.circular(4)),
             ),
             child: const Icon(
               Icons.info_outline,
-              color: Color(0xFF00bcd4),
+              color: Colors.white,
               size: 20,
             ),
           ),
-          const SizedBox(width: 14),
-          const Expanded(
+          SizedBox(width: 14),
+          Expanded(
             child: Column(
               crossAxisAlignment: CrossAxisAlignment.start,
               children: [
@@ -420,7 +438,7 @@ class _PermissionScreenState extends State<PermissionScreen> {
       _notificationGranted,
       _batteryOptOut,
     ].where((x) => x).length;
-    final total = 3;
+    const total = 3;
     final progress = granted / total;
 
     return Column(
@@ -428,9 +446,11 @@ class _PermissionScreenState extends State<PermissionScreen> {
       children: [
         Row(
           children: [
-            const Icon(
-              Icons.check_circle_outline,
-              color: Color(0xFF00e676),
+            Icon(
+              granted == total
+                  ? Icons.check_circle
+                  : Icons.check_circle_outline,
+              color: const Color(0xFF00e676),
               size: 14,
             ),
             const SizedBox(width: 8),