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/YamlCodeMirror.tsx

@@ -0,0 +1,90 @@
+// YAML CodeMirror 封装：保证编辑区可滚动、撑满父容器 // Logan.Li
+import { useRef, useState, useEffect, useMemo } from 'react';
+import CodeMirror from '@uiw/react-codemirror';
+import { yaml } from '@codemirror/lang-yaml';
+import { oneDark } from '@codemirror/theme-one-dark';
+import { EditorView } from '@codemirror/view';
+
+const scrollTheme = EditorView.theme({
+  '&': { height: '100%' },
+  '.cm-scroller': { overflow: 'auto' },
+});
+
+export interface YamlCodeMirrorProps {
+  value: string;
+  onChange?: (value: string) => void;
+  editing?: boolean;
+  /** 撑满 flex 父容器（配合 flex-1 min-h-0）// Logan.Li */
+  fill?: boolean;
+  /** 固定高度，fill 时忽略 */
+  height?: string;
+  className?: string;
+  fontSize?: string;
+}
+
+export function YamlCodeMirror({
+  value,
+  onChange,
+  editing = true,
+  fill = false,
+  height = '480px',
+  className = '',
+  fontSize = '13px',
+}: YamlCodeMirrorProps) {
+  const containerRef = useRef<HTMLDivElement>(null);
+  const [fillHeight, setFillHeight] = useState(400);
+
+  useEffect(() => {
+    if (!fill || !containerRef.current) return;
+    const el = containerRef.current;
+    const sync = () => setFillHeight(Math.max(200, el.clientHeight));
+    const ro = new ResizeObserver(sync);
+    ro.observe(el);
+    sync();
+    return () => ro.disconnect();
+  }, [fill]);
+
+  const extensions = useMemo(() => [
+    yaml(),
+    EditorView.lineWrapping,
+    scrollTheme,
+    ...(editing ? [] : [EditorView.editable.of(false)]),
+  ], [editing]);
+
+  const editorHeight = fill ? `${fillHeight}px` : height;
+
+  const editor = (
+    <CodeMirror
+      value={value}
+      height={editorHeight}
+      theme={oneDark}
+      extensions={extensions}
+      onChange={onChange}
+      basicSetup={{
+        lineNumbers: true,
+        foldGutter: true,
+        highlightActiveLine: editing,
+        highlightActiveLineGutter: editing,
+        autocompletion: editing,
+        bracketMatching: true,
+        closeBrackets: editing,
+        indentOnInput: editing,
+      }}
+      style={{ fontSize }}
+    />
+  );
+
+  if (fill) {
+    return (
+      <div ref={containerRef} className={`flex-1 min-h-0 h-full overflow-hidden rounded-lg border border-slate-700 ${className}`}>
+        {editor}
+      </div>
+    );
+  }
+
+  return (
+    <div className={`overflow-auto rounded-lg border border-slate-700 ${className}`}>
+      {editor}
+    </div>
+  );
+}