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/domain/usecases/auth/logout_usecase.dart

@@ -1,17 +1,18 @@
 import 'package:dartz/dartz.dart';
-import '../../../services/auth_service.dart';
+import '../../repositories/auth_repository.dart';
 import '../../../core/errors/failures.dart';
 import '../base_usecase.dart';
 
 /// 로그아웃 UseCase
 /// 사용자 로그아웃 처리 및 토큰 삭제
 class LogoutUseCase extends UseCase<void, NoParams> {
-  final AuthService _authService;
+  // AuthRepository 기반으로 마이그레이션
+  final AuthRepository _authRepository;
 
-  LogoutUseCase(this._authService);
+  LogoutUseCase(this._authRepository);
 
   @override
   Future<Either<Failure, void>> call(NoParams params) async {
-    return await _authService.logout();
+    return await _authRepository.logout();
   }
-}
+}