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/user_service.dart

@@ -178,6 +178,7 @@ class UserService {
       email: dto.email ?? '',
       name: dto.name,
       phone: dto.phone,
+      companyName: dto.company?.name,
       role: UserRole.staff, // UserDto에는 role이 없으므로 기본값
       isActive: true, // UserDto에는 isActive가 없으므로 기본값
       createdAt: DateTime.now(), // UserDto에는 createdAt이 없으므로 현재 시간
@@ -191,4 +192,4 @@ class UserService {
     if (phoneNumbers.isEmpty) return null;
     return phoneNumbers.first['number'];
   }
-}
+}