added firebase for notification

lib/main.dart

@@ -1,15 +1,19 @@
 // main.dart
 import 'dart:ui';
 
+import 'package:firebase_core/firebase_core.dart';
+import 'package:firebase_messaging/firebase_messaging.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
+import 'package:logger/logger.dart';
 import 'package:provider/provider.dart';
 import 'package:provider/single_child_widget.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:tm_app/core/config/dependencies.dart';
 import 'package:tm_app/core/config/web_url_strategy.dart';
 import 'package:tm_app/core/services/cache_init.dart';
+import 'package:tm_app/core/services/messaging_service.dart';
 import 'package:tm_app/core/theme/theme_provider.dart';
 
 import 'core/routes/app_routes.dart';
@@ -39,6 +43,27 @@ void main() async {
   // Configure web URL strategy if running on web
   configureWebUrlStrategy();
 
+  if (kIsWeb) {
+    await Firebase.initializeApp(
+      options: const FirebaseOptions(
+        apiKey: 'AIzaSyAUQhM789-0qZIaIWtwTQXyz9gEtN-TnnU',
+        authDomain: 'opplens.firebaseapp.com',
+        appId: '1:1071558853812:web:d9ca896b088ee7da48c3e1',
+        messagingSenderId: '1071558853812',
+        projectId: 'opplens',
+        storageBucket: 'opplens.firebasestorage.app',
+        measurementId: 'G-GJGP9WB28B',
+      ),
+    );
+    final _firebaseMessaging = FirebaseMessaging.instance;
+    await _firebaseMessaging.requestPermission();
+    final fcmToken = await _firebaseMessaging.getToken();
+    Logger().i('FCMToken: $fcmToken');
+  } else {
+    await Firebase.initializeApp();
+    await MessagingService().initNotifications();
+  }
+
   runApp(MultiProvider(providers: providers, child: const MyApp()));
 }