전역 구조 리팩터링 및 테스트 확장

lib/features/masters/warehouse/presentation/controllers/warehouse_controller.dart

@@ -7,6 +7,8 @@ import '../../domain/repositories/warehouse_repository.dart';
 enum WarehouseStatusFilter { all, activeOnly, inactiveOnly }
 
 class WarehouseController extends ChangeNotifier {
+  static const int defaultPageSize = 20;
+
   WarehouseController({required WarehouseRepository repository})
     : _repository = repository;
 
@@ -17,6 +19,7 @@ class WarehouseController extends ChangeNotifier {
   bool _isSubmitting = false;
   String _query = '';
   WarehouseStatusFilter _statusFilter = WarehouseStatusFilter.all;
+  int _pageSize = defaultPageSize;
   String? _errorMessage;
 
   PaginatedResult<Warehouse>? get result => _result;
@@ -24,6 +27,7 @@ class WarehouseController extends ChangeNotifier {
   bool get isSubmitting => _isSubmitting;
   String get query => _query;
   WarehouseStatusFilter get statusFilter => _statusFilter;
+  int get pageSize => _pageSize;
   String? get errorMessage => _errorMessage;
 
   Future<void> fetch({int page = 1}) async {
@@ -38,11 +42,14 @@ class WarehouseController extends ChangeNotifier {
       };
       final response = await _repository.list(
         page: page,
-        pageSize: _result?.pageSize ?? 20,
+        pageSize: _pageSize,
         query: _query.isEmpty ? null : _query,
         isActive: isActive,
       );
       _result = response;
+      if (response.pageSize > 0 && response.pageSize != _pageSize) {
+        _pageSize = response.pageSize;
+      }
     } catch (e) {
       _errorMessage = e.toString();
     } finally {
@@ -52,15 +59,29 @@ class WarehouseController extends ChangeNotifier {
   }
 
   void updateQuery(String value) {
+    if (_query == value) {
+      return;
+    }
     _query = value;
     notifyListeners();
   }
 
   void updateStatusFilter(WarehouseStatusFilter filter) {
+    if (_statusFilter == filter) {
+      return;
+    }
     _statusFilter = filter;
     notifyListeners();
   }
 
+  void updatePageSize(int size) {
+    if (size <= 0 || _pageSize == size) {
+      return;
+    }
+    _pageSize = size;
+    notifyListeners();
+  }
+
   Future<Warehouse?> create(WarehouseInput input) async {
     _setSubmitting(true);
     try {