small fix, don't worry about it

lifetimer/lib/features/settings/application/settings_controller.dart

@@ -5,7 +5,11 @@ import '../../../bootstrap/supabase_client.dart';
 import '../../auth/application/auth_controller.dart';
 
 final userRepositoryProvider = Provider<UserRepository>((ref) {
-  return UserRepository(supabaseClient);
+  final client = supabaseClient;
+  if (client == null) {
+    throw Exception('Supabase not initialized - user repository unavailable');
+  }
+  return UserRepository(client);
 });
 
 final notificationsRepositoryProvider = Provider<NotificationsRepository>((ref) {