FCM push Notifications

lib/providers/auth_provider.dart

@@ -2,6 +2,9 @@ import 'dart:async';
 
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:supabase_flutter/supabase_flutter.dart';
+import 'package:firebase_messaging/firebase_messaging.dart';
+import 'notifications_provider.dart';
+import '../utils/device_id.dart';
 
 import 'supabase_provider.dart';
 
@@ -64,6 +67,23 @@ class AuthController {
   }
 
   Future<void> signOut() {
+    // Attempt to unregister this device's FCM token before signing out.
+    return _doSignOut();
+  }
+
+  Future<void> _doSignOut() async {
+    try {
+      final userId = _client.auth.currentUser?.id;
+      if (userId != null) {
+        try {
+          final token = await FirebaseMessaging.instance.getToken();
+          if (token != null) {
+            final ctrl = NotificationsController(_client);
+            await ctrl.unregisterFcmToken(token);
+          }
+        } catch (_) {}
+      }
+    } catch (_) {}
     return _client.auth.signOut();
   }
 }