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/NamespaceResourcePage.tsx

@@ -31,6 +31,8 @@ type ResourceType =
 
 // 支持可视化编辑/新建的资源类型 // Logan.Li
 const VISUAL_RESOURCE_TYPES: ResourceType[] = ['services', 'ingresses', 'configmaps', 'secrets', 'pvcs'];
+/** 支持命名空间 YAML 批量导出（对齐集群导出）// Logan.Li */
+const EXPORT_YAML_TYPES: ResourceType[] = ['deployments', 'services', 'ingresses', 'configmaps', 'secrets'];
 
 const VisualActions = ({ name, opts }: { name: string; opts: { onYaml?: (n: string) => void; onEdit?: (n: string) => void } }) => (
   <div className="flex items-center gap-0.5">
@@ -71,10 +73,8 @@ const RESOURCE_CONFIG: Record<ResourceType, {
         </TableCell>
         <TableCell className="text-xs text-slate-500 max-w-[200px] truncate">{d.image || '-'}</TableCell>
         <TableCell onClick={(e) => e.stopPropagation()}>
-          <div className="flex items-center gap-0.5">
-            <Button variant="ghost" size="icon" className="h-7 w-7 text-slate-400 hover:text-blue-400" title="查看YAML"
-              onClick={() => opts.onYaml?.(d.name)}><FileCode className="h-3.5 w-3.5" /></Button>
-          </div>
+          <Button variant="ghost" size="sm" className="h-7 px-2 text-xs text-blue-400 hover:text-blue-300 hover:bg-blue-500/10" title="查看 YAML"
+            onClick={() => opts.onYaml?.(d.name)}><FileCode className="h-3.5 w-3.5 mr-1" />YAML</Button>
         </TableCell>
       </TableRow>
     ),
@@ -318,7 +318,7 @@ export default function NamespaceResourcePage() {
   const { clusterCode, namespace } = useParams<{ clusterCode: string; namespace: string }>();
   const location = useLocation();
   const navigate = useNavigate();
-  const { toast: _toast } = useToast();
+  const { toast } = useToast();
   const type = useMemo<ResourceType>(() => {
     const segments = location.pathname.split('/');
     const last = segments[segments.length - 1];
@@ -417,6 +417,15 @@ export default function NamespaceResourcePage() {
   const handleCreate = () => setVisualItem({ resource: type, name: '', isCreate: true });
   const handleExportCSV = () => kubernetesApi.exportAsCSV(`${type}-${clusterCode}-${namespace}.csv`, filtered);
   const handleExportJSON = () => kubernetesApi.exportAsJSON(`${type}-${clusterCode}-${namespace}.json`, filtered);
+  const handleExportYaml = async () => {
+    if (!clusterCode || !namespace) return;
+    try {
+      await kubernetesApi.exportNamespaceResources(clusterCode, namespace);
+      toast({ title: '导出完成', description: `${namespace} 资源 YAML 已开始下载` });
+    } catch (e) {
+      toast({ title: '导出失败', description: (e as Error)?.message || String(e), variant: 'destructive' });
+    }
+  };
 
   if (!config) return <div className="text-slate-400 p-8 text-center">未知资源类型: {type}</div>;
 
@@ -430,7 +439,6 @@ export default function NamespaceResourcePage() {
           name={yamlItem.name}
           onClose={() => setYamlItem(null)}
           onSaved={loadData}
-          cleanBeforeEdit={true}
           autoEdit={yamlItem.editMode === true}
         />
       )}
@@ -482,6 +490,11 @@ export default function NamespaceResourcePage() {
           <Button variant="outline" size="sm" className="h-9 border-slate-700 text-slate-400 text-xs" onClick={handleExportJSON} title="导出JSON">
             <Download className="h-3 w-3 mr-1" />JSON
           </Button>
+          {EXPORT_YAML_TYPES.includes(type) && (
+            <Button variant="outline" size="sm" className="h-9 border-slate-700 text-slate-400 text-xs" onClick={handleExportYaml} title="导出命名空间 YAML（tar.gz）">
+              <Download className="h-3 w-3 mr-1" />导出YAML
+            </Button>
+          )}
           {VISUAL_RESOURCE_TYPES.includes(type) && (
             <>
               <Button variant="outline" size="sm" className="h-9 border-slate-700 text-slate-400 text-xs" onClick={() => setShowYamlImport(true)}>