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/deployment-view/PodsTab.tsx

@@ -3,14 +3,14 @@ import { Card, CardContent } from '@/components/ui/card';
 import { Button } from '@/components/ui/button';
 import { Badge } from '@/components/ui/badge';
 import {
-  ChevronDown, ChevronRight, Terminal, FileText, HardDrive,
+  ChevronDown, ChevronRight, Terminal, FileText, HardDrive, FileCode,
 } from 'lucide-react';
 import { formatK8sTime, statusColor } from '../k8s-yaml-utils';
 import { getPodTimeline, PodConditionsRow } from './helpers';
 import type { DeploymentViewProps } from './types';
 
 export function PodsTab({
-  clusterCode, pods, onShowPodLogs, onShowPodTerminal, onShowPodFileBrowser,
+  clusterCode, pods, onShowPodLogs, onShowPodTerminal, onShowPodYaml, onShowPodFileBrowser,
   expandedPod, setExpandedPod,
 }: DeploymentViewProps & { expandedPod: string | null; setExpandedPod: (v: string | null) => void }) {
   if (pods.length === 0) {
@@ -52,6 +52,9 @@ export function PodsTab({
                 <Button variant="ghost" size="sm" className="h-7 text-xs text-amber-400" onClick={() => onShowPodFileBrowser(pod)}>
                   <HardDrive className="h-3.5 w-3.5 mr-1" />文件
                 </Button>
+                <Button variant="ghost" size="sm" className="h-7 text-xs text-slate-400 hover:text-blue-400" onClick={() => onShowPodYaml(pod)}>
+                  <FileCode className="h-3.5 w-3.5 mr-1" />YAML
+                </Button>
               </div>
               {/* Expanded: timeline */}
               {expanded && (