converting and desconverting all dates to utc

apps/mobile/packages/features/staff/clock_in/lib/src/data/repositories_impl/clock_in_repository_impl.dart

@@ -65,7 +65,7 @@ class ClockInRepositoryImpl implements ClockInRepositoryInterface {
   /// Helper to create Timestamp from DateTime
   Timestamp _fromDateTime(DateTime d) {
     // Assuming Timestamp.fromJson takes an ISO string
-    return Timestamp.fromJson(d.toIso8601String());
+    return Timestamp.fromJson(d.toUtc().toIso8601String());
   }
 
   /// Helper to find today's active application