feat: trigger notification provider refresh upon receiving FCM push notifications

lib/core/services/push_notification_service.dart

@@ -164,6 +164,9 @@ class PushNotificationService {
     }
   }
 
+  /// Callback to refresh notification count when FCM arrives
+  void Function()? onNotificationReceived;
+
   void _onForegroundMessage(RemoteMessage message) {
     debugPrint('[FCM] Foreground message: ${message.notification?.title}');
 
@@ -178,6 +181,9 @@ class PushNotificationService {
       return;
     }
 
+    // Refresh notification count immediately
+    onNotificationReceived?.call();
+
     // Show local notification on Android (iOS handles it natively)
     if (Platform.isAndroid) {
       _localNotifications?.show(

lib/features/notifications/presentation/providers/notification_provider.dart

@@ -1,6 +1,7 @@
 import 'dart:async';
 
 import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:real_estate_mobile/core/services/push_notification_service.dart';
 import 'package:real_estate_mobile/core/storage/secure_storage.dart';
 import 'package:real_estate_mobile/features/messaging/data/socket_service.dart';
 import 'package:real_estate_mobile/features/notifications/data/models/notification_model.dart';
@@ -25,6 +26,8 @@ class UnreadCountNotifier extends StateNotifier<int> {
     _subs.add(socket.onNewMessage.listen((_) => refresh()));
     _subs.add(socket.onConnectionRequest.listen((_) => refresh()));
     _subs.add(socket.onConnectionResponse.listen((_) => refresh()));
+    // Also refresh when FCM push notification arrives (works even without socket)
+    PushNotificationService().onNotificationReceived = () => refresh();
   }
 
   Future<void> refresh() async {