feat: 添加多项功能和修复

功能新增:
- OSS 存储使用情况显示（文件页面）
- OSS 当日流量统计（阿里云云监控API）
- 分享页面路由修复（/s/xxx 格式支持）

Bug修复:
- 修复分享页面资源路径（相对路径改绝对路径）
- 修复分享码获取逻辑（支持路径格式）
- 修复OSS配额undefined显示问题
- 修复登录流程OSS配置检查
- 修复文件数为null时的显示问题

依赖更新:
- 添加 @alicloud/cms20190101 云监控SDK
- 添加 @alicloud/openapi-client

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/node_modules/ignore-by-default/README.md

@@ -0,0 +1,26 @@
+# ignore-by-default
+
+This is a package aimed at Node.js development tools. It provides a list of
+directories that should probably be ignored by such tools, e.g. when watching
+for file changes.
+
+It's used by [AVA](https://www.npmjs.com/package/ava) and
+[nodemon](https://www.npmjs.com/package/nodemon).
+
+[Please contribute!](./CONTRIBUTING.md)
+
+## Installation
+
+```
+npm install --save ignore-by-default
+```
+
+## Usage
+
+The `ignore-by-default` module exports a `directories()` function, which will
+return an array of directory names. These are the ones you should ignore.
+
+```js
+// ['.git', '.sass_cache', …]
+var ignoredDirectories = require('ignore-by-default').directories()
+```