feat(k8s): 统一 YAML 查看编辑并补齐 Pod/导出能力

- 抽取 YamlCodeMirror/YamlEditorToolbar，修复弹窗滚动与固定高度布局
- 对齐集群导出精简规则（Service/Ingress/Workload/PVC 注解等）
- Deployment/Pod/Service/Ingress 分资源配置：Pod 只读，支持单文件下载
- 修复 Deployment Pod YAML 弹窗未渲染，补全 PodsTab 与详情页 YAML 入口
- 命名空间列表页新增导出 YAML（tar.gz），与集群导出 API 一致

frontend/src/components/kubernetes/DeploymentDetail.tsx

@@ -14,6 +14,7 @@ import { DeploymentPodsTab } from './deployment-detail/DeploymentPodsTab';
 import { DeploymentLogsTab } from './deployment-detail/DeploymentLogsTab';
 import { DeploymentHpaTab } from './deployment-detail/DeploymentHpaTab';
 import { DeploymentPodModals } from './deployment-detail/DeploymentPodModals';
+import { YamlViewer } from './YamlViewer';
 
 export function DeploymentDetail({ clusterCode, namespace, deploymentName, onBack }: DeploymentDetailProps) {
   const { toast } = useToast();
@@ -33,6 +34,7 @@ export function DeploymentDetail({ clusterCode, namespace, deploymentName, onBac
   const [logsViewerOpen, setLogsViewerOpen] = useState(false);
   const [fileBrowserPod, setFileBrowserPod] = useState<PodWithContainers | null>(null);
   const [fileBrowserOpen, setFileBrowserOpen] = useState(false);
+  const [yamlPodName, setYamlPodName] = useState<string | null>(null);
   const [logsTabPod, setLogsTabPod] = useState<string>('');
 
   const loadData = useCallback(async () => {
@@ -187,6 +189,7 @@ export function DeploymentDetail({ clusterCode, namespace, deploymentName, onBac
           onOpenLogsViewer={(pod) => { setLogsViewerPod(pod); setLogsViewerOpen(true); }}
           onOpenExec={(pod) => { setExecPod(pod); setExecOpen(true); }}
           onOpenFileBrowser={(pod) => { setFileBrowserPod(pod); setFileBrowserOpen(true); }}
+          onOpenYaml={setYamlPodName}
         />
         <DeploymentLogsTab
           pods={pods}
@@ -206,6 +209,17 @@ export function DeploymentDetail({ clusterCode, namespace, deploymentName, onBac
         />
       </Tabs>
 
+      {yamlPodName && (
+        <YamlViewer
+          clusterCode={clusterCode}
+          namespace={namespace}
+          resource="pods"
+          name={yamlPodName}
+          readOnly
+          onClose={() => setYamlPodName(null)}
+        />
+      )}
+
       <DeploymentPodModals
         clusterCode={clusterCode}
         namespace={namespace}