feat(k8s): M11 StatefulSet/DaemonSet 详情页 — WorkloadViewPage 重写 + YAML 路由冲突修复

后端:
- routes.go: 为 statefulsets/daemonsets 注册专门 YAML 子路由（Gin radix tree 冲突）
- kubernetes.go: GetResourceYAMLNS/UpdateResourceYAMLNS 添加 URL path fallback

前端:
- WorkloadViewPage.tsx 重写: 修复 kind 提取 bug(useLocation) + 更新策略/选择器/PVC模板/InitContainers
- NamespaceResourcePage.tsx: handleDetail 添加 STS/DS 点击导航

验证: DS YAML API 200 ✅ | DS Detail 200 ✅ | Dep YAML 200 ✅ | SPA路由 200 ✅ | TS零错误 ✅

frontend/src/components/kubernetes/PodFileBrowser.tsx

@@ -38,6 +38,7 @@ export function PodFileBrowser({
   const [preview, setPreview] = useState<{ file: string; content: string } | null>(null);
   const [uploading, setUploading] = useState(false);
   const fileInputRef = useRef<HTMLInputElement>(null);
+  const workdirDetected = useRef(false);
 
   const loadFiles = useCallback(async (path: string) => {
     setLoading(true);
@@ -64,8 +65,32 @@ export function PodFileBrowser({
   }, [clusterCode, namespace, podName, container]);
 
   useEffect(() => {
-    if (open) loadFiles('/');
-  }, [open, loadFiles]);
+    if (open) {
+      // 检测容器 WORKDIR 作为初始路径（执行 pwd 命令）
+      const detectWorkdir = async () => {
+        if (workdirDetected.current) {
+          loadFiles(currentPath);
+          return;
+        }
+        setLoading(true);
+        try {
+          const res: any = await kubernetesApi.execPod(clusterCode, namespace, podName, ['pwd'], container || undefined);
+          const stdout = (res?.stdout || res?.data?.stdout || '').trim();
+          const workdir = stdout && stdout.startsWith('/') ? stdout : '/';
+          workdirDetected.current = true;
+          setCurrentPath(workdir);
+          loadFiles(workdir);
+        } catch {
+          // pwd 失败则默认 /
+          workdirDetected.current = true;
+          loadFiles('/');
+        }
+      };
+      detectWorkdir();
+    } else {
+      workdirDetected.current = false;
+    }
+  }, [open, container]);
 
   const handleClick = (entry: FileEntry) => {
     if (entry.isDir) {