feat(menu-permissions): 메뉴 API 연동으로 사이드바 권한 정비

- .env.development.example과 lib/core/config/environment.dart, lib/core/permissions/permission_manager.dart에서 PERMISSION__ 폴백을 view 전용으로 좁히고 기본 정책을 명시적으로 거부하도록 재정비했다

- lib/core/navigation/*, lib/core/routing/app_router.dart, lib/widgets/app_shell.dart, lib/main.dart에서 메뉴 매니페스트·카탈로그를 도입해 /menus 응답을 캐싱하고 라우터·사이드바·Breadcrumb가 동일 menu_code/route_path를 쓰도록 리팩터링했다

- lib/core/permissions/permission_resources.dart와 그룹 권한/메뉴 마스터 모듈을 menu_code 기반 CRUD 및 Catalog 경로 정합성 검사로 전환하고 PermissionSynchronizer·PermissionBootstrapper를 확장했다

- test/helpers/test_permissions.dart, test/widgets/app_shell_test.dart 등 신규 구조를 반영하는 테스트·골든과 doc/frontend_menu_permission_tasks.md 문서를 보강했다

lib/features/masters/menu/presentation/pages/menu_page.dart

@@ -2,13 +2,14 @@ import 'package:flutter/material.dart';
 import 'package:get_it/get_it.dart';
 import 'package:shadcn_ui/shadcn_ui.dart';
 
-import 'package:superport_v2/core/constants/app_sections.dart';
+import 'package:superport_v2/core/navigation/route_paths.dart';
 import 'package:superport_v2/widgets/app_layout.dart';
 import 'package:superport_v2/widgets/components/filter_bar.dart';
 import 'package:superport_v2/widgets/components/superport_pagination_controls.dart';
 import 'package:superport_v2/widgets/components/superport_table.dart';
 
 import '../../../../../core/config/environment.dart';
+import '../../../../../core/navigation/menu_catalog.dart';
 import '../../../../../widgets/spec_page.dart';
 import '../../domain/entities/menu.dart';
 import '../../domain/repositories/menu_repository.dart';
@@ -107,12 +108,20 @@ class _MenuEnabledPageState extends State<_MenuEnabledPage> {
   final FocusNode _searchFocus = FocusNode();
   final DateFormat _dateFormat = DateFormat('yyyy-MM-dd HH:mm');
   String? _lastError;
+  bool _controllerInitialized = false;
 
   @override
-  void initState() {
-    super.initState();
-    _controller = menu.MenuController(repository: GetIt.I<MenuRepository>())
-      ..addListener(_handleControllerUpdate);
+  void didChangeDependencies() {
+    super.didChangeDependencies();
+    if (_controllerInitialized) {
+      return;
+    }
+    final catalog = MenuCatalogScope.of(context);
+    _controller = menu.MenuController(
+      repository: GetIt.I<MenuRepository>(),
+      catalog: catalog,
+    )..addListener(_handleControllerUpdate);
+    _controllerInitialized = true;
     WidgetsBinding.instance.addPostFrameCallback((_) async {
       await _controller.loadParents();
       await _controller.fetch();
@@ -133,8 +142,10 @@ class _MenuEnabledPageState extends State<_MenuEnabledPage> {
 
   @override
   void dispose() {
-    _controller.removeListener(_handleControllerUpdate);
-    _controller.dispose();
+    if (_controllerInitialized) {
+      _controller.removeListener(_handleControllerUpdate);
+      _controller.dispose();
+    }
     _searchController.dispose();
     _searchFocus.dispose();
     super.dispose();
@@ -166,7 +177,7 @@ class _MenuEnabledPageState extends State<_MenuEnabledPage> {
           subtitle: '메뉴 트리와 경로, 사용 상태를 관리합니다.',
           breadcrumbs: const [
             AppBreadcrumbItem(label: '대시보드', path: dashboardRoutePath),
-            AppBreadcrumbItem(label: '마스터', path: '/masters/menus'),
+            AppBreadcrumbItem(label: '마스터', path: settingsMenusRoutePath),
             AppBreadcrumbItem(label: '메뉴'),
           ],
           actions: [