fixed time ago in notifications

lib/view_models/notification_view_model.dart

@@ -315,8 +315,9 @@ class NotificationViewModel with ChangeNotifier {
     notifyListeners();
   }
 
-  String timeAgo(String dateTimeString) {
-    final createdAt = DateTime.parse(dateTimeString);
+  String timeAgo(timestamp) {
+    final int ts = int.tryParse(timestamp.toString()) ?? 0;
+    final createdAt = DateTime.fromMillisecondsSinceEpoch(ts * 1000).toLocal();
     final now = DateTime.now();
     final difference = now.difference(createdAt);
 

lib/views/notification/widgets/notification_card.dart

@@ -112,7 +112,7 @@ class NotificationCard extends StatelessWidget {
                 SvgPicture.asset(AssetsManager.calendar),
                 SizedBox(width: 4.0.w()),
                 Text(
-                  viewModel.timeAgo(notification.createdAt!),
+                  viewModel.timeAgo(notification.createdAt!.toString()),
                   style: TextStyle(
                     fontSize: 12.0.sp(),
                     fontWeight: FontWeight.w400,