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

packages/contracts/src/settings.ts

@@ -1085,9 +1085,10 @@ export const SETTINGS_SECTIONS: readonly SettingsSectionDef[] = [
     id: "library",
     group: "flow",
     label: "媒体库与目录",
-    description: "媒体库目录、整理来源、分类规则、命名模板",
+    description: "存储、媒体库目录、整理来源、分类规则、命名模板",
     legacyTabs: [{ tab: "library-roots", anchor: "roots" }],
     anchors: [
+      { id: "storages", label: "存储", keywords: ["Alist", "OpenList", "网盘", "令牌"] },
       { id: "roots", label: "媒体库目录", keywords: ["标记文件", "检查目录"] },
       { id: "sources", label: "整理来源" },
       { id: "classification", label: "分类规则", keywords: ["二级分类"] },
@@ -1102,7 +1103,7 @@ export const SETTINGS_SECTIONS: readonly SettingsSectionDef[] = [
       "naming.variety",
       "naming.lockFileNameForBound",
     ],
-    resources: ["library-roots"],
+    resources: ["storage-instances", "library-roots"],
   },
   {
     id: "organize",