feat: Implement DataErrorHandler mixin and update imports for consistency

apps/mobile/packages/data_connect/lib/krow_data_connect.dart

@@ -3,7 +3,6 @@
 /// This package provides mock implementations of domain repository interfaces
 /// for development and testing purposes.
 ///
-/// TODO: These mocks currently do not implement any specific interfaces.
 /// They will implement interfaces defined in feature packages once those are created.
 library;
 
@@ -16,4 +15,4 @@ export 'src/dataconnect_generated/generated.dart';
 export 'src/services/data_connect_service.dart';
 
 export 'src/session/staff_session_store.dart';
-export 'src/mixins/data_error_handler.dart';
+export 'src/services/mixins/data_error_handler.dart';

apps/mobile/packages/data_connect/lib/src/services/data_connect_service.dart

@@ -6,7 +6,7 @@ import 'package:krow_core/core.dart';
 import 'package:krow_domain/krow_domain.dart';
 
 import '../../krow_data_connect.dart' as dc;
-import '../mixins/data_error_handler.dart';
+import 'mixins/data_error_handler.dart';
 
 /// A centralized service for interacting with Firebase Data Connect.
 ///

apps/mobile/packages/features/client/authentication/lib/src/data/repositories_impl/auth_repository_impl.dart

@@ -414,6 +414,7 @@ class AuthRepositoryImpl implements AuthRepositoryInterface {
 
     return domainUser;
   }
+  
   @override
   Future<domain.User?> restoreSession() async {
     final firebase.User? firebaseUser = _service.auth.currentUser;