refactor: full-stack restructure with multi-tenancy, workspace management, and K8s diagnostics

- Add Workspace domain (entity, repository, service, handler, DTO)
- Add multi-tenant K8s client with tenant binding and quota management
- Add K8s diagnostics client (instance diagnostics)
- Add authorization middleware (authz package)
- Restructure frontend to feature-based architecture (features/)
- Add User Management page in configuration
- Add AccessDenied page and route guards
- Refactor shared components (form inputs, layout, UI)
- Update Tailwind config for new design system
- Add comprehensive documentation (docs/, tasks/, plans)
- Improve cluster service with better kubeconfig handling
- Add tests for crypto, config, helm client, tenant binding

backend/scripts/quick-start-production.sh

@@ -75,11 +75,10 @@ echo "  - Health: http://localhost:8080/health"
 echo ""
 echo "📍 数据库管理:"
 echo "  - pgAdmin: http://localhost:5050"
-echo "    Email: admin@ocdp.local"
-echo "    Password: admin"
+echo "    Email: ${PGADMIN_EMAIL:-admin@ocdp.local}"
+echo "    Password: ${PGADMIN_PASSWORD:-change-me}"
 echo ""
 echo "✨ 按 Ctrl+C 停止服务"
 echo ""
 
 ./bin/ocdp-backend
-