feat(web): 存储设置与文件管理的 Alist 存储切换

- 设置 → 媒体库与目录 → 存储:登记 Alist / OpenList(令牌 / 账号密码 / 访客、路径密码、限速与监控选项),
  测试连接显示版本、用户与容量;媒体库目录可选存储
- 文件管理左栏多一组「Alist 存储」,路径显示「存储名:/路径」;移动 / 复制目标可选 Alist 存储;
  上传按钮;Alist 根点刷新才让 Alist 刷新目录缓存
- 运行状态的挂载根列出存储实例(令牌失效单独提示)

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

apps/web/app/lib/api.ts

@@ -112,6 +112,10 @@ export async function apiFetch<T = unknown>(path: string, arg: FetcherArg = {}):
   let reqBody: BodyInit | undefined;
   if (body instanceof FormData) {
     reqBody = body;
+  } else if (typeof Blob !== "undefined" && body instanceof Blob) {
+    // 原始字节(如 PUT /files/upload)
+    reqHeaders["Content-Type"] ??= "application/octet-stream";
+    reqBody = body;
   } else if (body !== undefined && body !== null) {
     reqHeaders["Content-Type"] ??= "application/json";
     reqBody = JSON.stringify(body);