feat: 路由改名/kubectl预装/导出YAML精简/Service标签页优化/Alpine镜像源换清华

- 路由 /deploy/credentials → /deploy/configureTools
- kubectl 改为预装(Dockerfile) + 种子数据 preinstall
- 导出YAML精简: Service/Ingress/Deployment 全面清理运行时字段
- DeploymentEditService 只显示匹配 selector 的关联 Service
- Alpine 镜像源 mirrors.aliyun.com → mirrors.tuna.tsinghua.edu.cn

frontend/src/components/layout/Sidebar.tsx

@@ -74,7 +74,7 @@ const menuItems: MenuItem[] = [
     id: 'deploy', name: '应用发布', icon: Rocket,
     children: [
       { id: 'pipelines', name: '流水线', icon: GitBranch, path: '/pipelines' },
-      { id: 'deploy-credentials', name: '发布配置', icon: Key, path: '/deploy/credentials' },
+      { id: 'deploy-credentials', name: '发布配置', icon: Key, path: '/deploy/configureTools' },
       { id: 'deploy-rbac', name: '发布权限', icon: Shield, path: '/deploy/rbac' },
     ],
   },