feat(files): 文件管理接入 Alist 存储(浏览、增删改、移动复制、上传下载、回收站)

- 文件管理根多出 st:<存储 id>(对照 MP 存储切换),Alist 媒体库目录照常出现在媒体库组
- 列目录一次 list,refresh 只在用户刷新时带;连不上返回 503 不当成空目录
- 新建目录 / 改名(同名不覆盖)/ 删除进 Alist 上的 .umt-trash 并可还原
- 存储内移动复制走 Alist API,本地 ↔ Alist 走整理同一套执行与账本
- 新增 PUT /files/upload(同名不覆盖,Alist 经服务端转传);下载 / 预览流式转发直链

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Cxwgnn2pbzQ7rXv3rq7fei

apps/server/test/file-manager/harness.ts

@@ -74,6 +74,8 @@ export interface FmHarness {
   api(method: string, path: string, body?: unknown, key?: string): Promise<{ status: number; body: Loose }>;
   /** 原始响应(非 JSON 接口,如 /files/download) */
   raw(method: string, path: string, key?: string): Promise<Response>;
+  /** 带原始请求体(如 PUT /files/upload) */
+  rawBody(method: string, path: string, body: BodyInit, key?: string): Promise<Response>;
   close(): Promise<void>;
 }
 
@@ -264,6 +266,15 @@ export async function createFmHarness(
     raw(method, path, key = DEV_KEY) {
       return Promise.resolve(app.request(`/api/v1${path}`, { method, headers: authHeaders(key) }));
     },
+    rawBody(method, path, body, key = DEV_KEY) {
+      return Promise.resolve(
+        app.request(`/api/v1${path}`, {
+          method,
+          headers: { ...authHeaders(key), "content-type": "application/octet-stream" },
+          body,
+        }),
+      );
+    },
     async close() {
       await ts.drop();
       await rm(base, { recursive: true, force: true });