전역 구조 리팩터링 및 테스트 확장

lib/features/masters/vendor/presentation/controllers/vendor_controller.dart

@@ -11,6 +11,8 @@ enum VendorStatusFilter { all, activeOnly, inactiveOnly }
 /// - 목록/검색/필터/페이지 상태를 관리한다.
 /// - 생성/수정/삭제/복구 요청을 래핑하여 UI에 알린다.
 class VendorController extends ChangeNotifier {
+  static const int defaultPageSize = 20;
+
   VendorController({required VendorRepository repository})
     : _repository = repository;
 
@@ -21,6 +23,7 @@ class VendorController extends ChangeNotifier {
   bool _isSubmitting = false;
   String _query = '';
   VendorStatusFilter _statusFilter = VendorStatusFilter.all;
+  int _pageSize = defaultPageSize;
   String? _errorMessage;
 
   PaginatedResult<Vendor>? get result => _result;
@@ -28,6 +31,7 @@ class VendorController extends ChangeNotifier {
   bool get isSubmitting => _isSubmitting;
   String get query => _query;
   VendorStatusFilter get statusFilter => _statusFilter;
+  int get pageSize => _pageSize;
   String? get errorMessage => _errorMessage;
 
   /// 목록 갱신
@@ -43,11 +47,14 @@ class VendorController 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 {
@@ -57,15 +64,29 @@ class VendorController extends ChangeNotifier {
   }
 
   void updateQuery(String value) {
+    if (_query == value) {
+      return;
+    }
     _query = value;
     notifyListeners();
   }
 
   void updateStatusFilter(VendorStatusFilter filter) {
+    if (_statusFilter == filter) {
+      return;
+    }
     _statusFilter = filter;
     notifyListeners();
   }
 
+  void updatePageSize(int size) {
+    if (size <= 0 || _pageSize == size) {
+      return;
+    }
+    _pageSize = size;
+    notifyListeners();
+  }
+
   /// 신규 등록
   Future<Vendor?> create(VendorInput input) async {
     _setSubmitting(true);