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/App.tsx

@@ -147,7 +147,7 @@ function App() {
             <Route path="pipelines/:code" element={<PipelineEditor />} />
             <Route path="pipelines/:code/runs" element={<PipelineRunDetail />} />
             <Route path="pipelines/:code/edit" element={<PipelineEditor />} />
-            <Route path="deploy/credentials" element={<DeployCredentials />} />
+            <Route path="deploy/configureTools" element={<DeployCredentials />} />
             <Route path="deploy/groups" element={<UserGroupsManager />} />
             <Route path="deploy/rbac" element={<DeployRBAC />} />
             {/* 监控告警 */}