feat(k8s): M3 Pod文件上传 + ExecInPod WebSocket协议重写

M3: Pod 文件上传
- 后端: POST .../pods/:pod/files/upload (multipart, base64分块exec写入)
- 前端: PodFileBrowser 增加上传按钮 + FormData API
- 路由: 新增 Kuboard (:clusterCode) + 旧 (:id) 两套路由

重大修复: ExecInPod 从 raw HTTP SPDY 改为 WebSocket channel.k8s.io
- 旧方案: HTTP POST + SPDY upgrade → 无法解析响应（协议头缺失 + 帧解析复杂）
- 新方案: gorilla/websocket Dialer + channel.k8s.io 子协议 → 和 ExecTerminal 一致
- 影响: 文件浏览/下载/上传全部恢复正常

修复: BusyBox ls 解析
- BusyBox 不支持 --time-style 参数，默认输出 Mon DD HH:MM 格式
- 解析器改为自动检测 GNU vs BusyBox 日期格式

frontend/src/services/api.ts

@@ -249,12 +249,13 @@ export const kubernetesApi = {
     return http.post(`/kubernetes/${clusterCode}/namespace/${namespace}/pods/${podName}/exec`, { command, container });
   },
   // 🆕 Pod 级 exec WebSocket URL (Logan <admin@attacker.club>)
-  // ws://host/ws/kubernetes-exec/:clusterId/namespaces/:ns/pods/:pod?container=&token=
+  // ws://host/ws/kubernetes-exec/:clusterId/namespaces/:ns/pods/:pod?container=&command=&token=
   buildPodExecWsUrl: (
     clusterId: number | string,
     namespace: string,
     podName: string,
-    container?: string
+    container?: string,
+    command?: string
   ) => {
     const proto = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
     const baseUrl = import.meta.env.VITE_API_BASE_URL || `${proto}//${window.location.host}`;
@@ -262,6 +263,7 @@ export const kubernetesApi = {
     const token = useUserStore.getState().token || '';
     const params = new URLSearchParams();
     if (container) params.set('container', container);
+    if (command) params.set('command', command);
     if (token) params.set('token', token);
     const qs = params.toString();
     return `${wsBase}/ws/kubernetes-exec/${clusterId}/namespaces/${namespace}/pods/${podName}${qs ? `?${qs}` : ''}`;
@@ -309,6 +311,33 @@ export const kubernetesApi = {
     if (!resp.ok) throw new Error(`HTTP ${resp.status}`);
     return resp.text();
   },
+  // 上传文件到 Pod 容器内指定目录
+  uploadPodFile: async (
+    clusterCode: string,
+    namespace: string,
+    podName: string,
+    targetPath: string,
+    file: File,
+    container?: string,
+  ) => {
+    const formData = new FormData();
+    formData.append('file', file);
+    formData.append('path', targetPath);
+    if (container) formData.append('container', container);
+    const token = useUserStore.getState().token || localStorage.getItem('token') || '';
+    const baseUrl = import.meta.env.VITE_API_BASE_URL || `${window.location.protocol}//${window.location.host}`;
+    const resp = await fetch(
+      `${baseUrl}/api/v1/kubernetes/${clusterCode}/namespace/${namespace}/pods/${podName}/files/upload`,
+      {
+        method: 'POST',
+        headers: token ? { Authorization: `Bearer ${token}` } : {},
+        body: formData,
+      },
+    );
+    const json = await resp.json();
+    if (!resp.ok || json.code !== 200) throw new Error(json.message || `HTTP ${resp.status}`);
+    return json.data;
+  },
   scaleDeployment: async (clusterCode: string, namespace: string, name: string, replicas: number) => {
     return http.post(`/kubernetes/${clusterCode}/namespace/${namespace}/deployments/${name}/scale`, { replicas });
   },