web: migrate health notifications to js_interop; add browser hook

- Replace dart:js with package:js in health_check_service_web.dart\n- Implement showHealthCheckNotification in web/index.html\n- Pin js dependency to ^0.6.7 for flutter_secure_storage_web compatibility

auth: harden AuthInterceptor + tests

- Allow overrideAuthRepository injection for testing\n- Normalize imports to package: paths\n- Add unit test covering token attach, 401→refresh→retry, and failure path\n- Add integration test skeleton gated by env vars

ui/data: map User.companyName to list column

- Add companyName to domain User\n- Map UserDto.company?.name\n- Render companyName in user_list

cleanup: remove legacy equipment table + unused code; minor warnings

- Remove _buildFlexibleTable and unused helpers\n- Remove unused zipcode details and cache retry constant\n- Fix null-aware and non-null assertions\n- Address child-last warnings in administrator dialog

docs: update AGENTS.md session context

lib/services/equipment_warehouse_cache_service.dart

@@ -33,7 +33,6 @@ class EquipmentWarehouseCacheService {
   
   // 설정 상수
   static const int _cacheValidMinutes = 10; // 10분간 캐시 유효
-  static const int _maxRetryCount = 3;      // 최대 재시도 횟수
 
   /// 캐시 로딩 상태
   bool get isLoaded => _isLoaded;
@@ -199,4 +198,4 @@ class EquipmentWarehouseCacheService {
       print('  $key: $value');
     });
   }
-}
+}