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/company/delete_company_usecase.dart

@@ -1,5 +1,5 @@
 import 'package:dartz/dartz.dart';
-import '../../../services/company_service.dart';
+import '../../repositories/company_repository.dart';
 import '../../../core/errors/failures.dart';
 import '../base_usecase.dart';
 
@@ -14,15 +14,16 @@ class DeleteCompanyParams {
 
 /// 회사 삭제 UseCase
 class DeleteCompanyUseCase extends UseCase<void, DeleteCompanyParams> {
-  final CompanyService _companyService;
+  // 레포지토리 기반으로 마이그레이션
+  final CompanyRepository _companyRepository;
 
-  DeleteCompanyUseCase(this._companyService);
+  DeleteCompanyUseCase(this._companyRepository);
 
   @override
   Future<Either<Failure, void>> call(DeleteCompanyParams params) async {
     try {
-      await _companyService.deleteCompany(params.id);
-      return const Right(null);
+      final result = await _companyRepository.deleteCompany(params.id);
+      return result;
     } on ServerFailure catch (e) {
       if (e.message.contains('associated')) {
         return Left(ValidationFailure(
@@ -41,4 +42,4 @@ class DeleteCompanyUseCase extends UseCase<void, DeleteCompanyParams> {
       ));
     }
   }
-}
+}