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/api/instances.ts

@@ -21,6 +21,10 @@ import type {
   SiteCredentialsPut,
   SiteCredentialsResult,
   SiteUpdate,
+  StorageInstance,
+  StorageInstanceCreate,
+  StorageInstanceUpdate,
+  StorageTestResult,
 } from "@umt/contracts";
 import { apiData } from "~/lib/api.ts";
 import { type QueryArea, qk } from "~/lib/query-keys.ts";
@@ -71,6 +75,15 @@ function actionHook<R>(area: QueryArea, path: string) {
   };
 }
 
+/** Alist / OpenList 存储实例 */
+export const storages = {
+  ...crudHooks<StorageInstance, StorageInstanceCreate, StorageInstanceUpdate>(
+    "storage-instances",
+    "/storage-instances",
+  ),
+  useTest: actionHook<StorageTestResult>("storage-instances", "/storage-instances/{id}/test"),
+};
+
 export const downloaders = {
   ...crudHooks<DownloaderInstance, DownloaderInstanceCreate, DownloaderInstanceUpdate>(
     "downloader-instances",