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/docker-quick-start.sh

@@ -197,8 +197,8 @@ start_pgadmin() {
     echo ""
     print_info "访问地址: http://localhost:5050"
     print_info "登录信息:"
-    echo "  📧 邮箱: admin@ocdp.local"
-    echo "  🔑 密码: admin"
+    echo "  📧 邮箱: ${PGADMIN_EMAIL:-admin@ocdp.local}"
+    echo "  🔑 密码: ${PGADMIN_PASSWORD:-change-me}"
     echo ""
     print_info "连接数据库配置:"
     echo "  📍 Host: postgres"
@@ -270,4 +270,3 @@ main() {
 
 # 运行主函数
 main
-