refactor: streamline date conversion logic in repository implementations

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

@@ -2,6 +2,7 @@ import 'package:firebase_auth/firebase_auth.dart' as firebase;
 import 'package:firebase_data_connect/firebase_data_connect.dart';
 import 'package:krow_data_connect/krow_data_connect.dart' as dc;
 import 'package:krow_domain/krow_domain.dart';
+import 'package:krow_core/core.dart';
 import '../../domain/repositories/clock_in_repository_interface.dart';
 
 /// Implementation of [ClockInRepositoryInterface] using Firebase Data Connect.
@@ -30,18 +31,35 @@ class ClockInRepositoryImpl implements ClockInRepositoryInterface {
   /// Helper to convert Data Connect Timestamp to DateTime
   DateTime? _toDateTime(dynamic t) {
     if (t == null) return null;
-    // Attempt to use toJson assuming it matches the generated code's expectation of String
-    try {
-      // If t has toDate (e.g. cloud_firestore), usage would be t.toDate()
-      // But here we rely on toJson or toString
-      return DateTime.tryParse(t.toJson() as String);
-    } catch (_) {
+    DateTime? dt;
+    if (t is DateTime) {
+      dt = t;
+    } else if (t is String) {
+      dt = DateTime.tryParse(t);
+    } else {
       try {
-         return DateTime.tryParse(t.toString());
-      } catch (e) {
-         return null;
-      }
+        if (t is Timestamp) {
+          dt = t.toDateTime();
+        }
+      } catch (_) {}
+
+      try {
+         if (dt == null && t.runtimeType.toString().contains('Timestamp')) {
+          dt = (t as dynamic).toDate();
+        }
+      } catch (_) {}
+
+      try {
+         if (dt == null) {
+          dt = DateTime.tryParse(t.toString());
+         }
+      } catch (_) {}
     }
+    
+    if (dt != null) {
+      return DateTimeUtils.toDeviceTime(dt);
+    }
+    return null;
   }
   
   /// Helper to create Timestamp from DateTime