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/@alicloud/darabonba-string/dist/client.d.ts

@@ -0,0 +1,19 @@
+/**
+ * This is a string module
+ */
+/// <reference types="node" />
+export default class Client {
+    static split(raw: string, sep: string, limit: number): string[];
+    static replace(raw: string, oldStr: string, newStr: string, count?: number): string;
+    static contains(s: string, substr: string): boolean;
+    static count(s: string, substr: string): number;
+    static hasPrefix(s: string, prefix: string): boolean;
+    static hasSuffix(s: string, substr: string): boolean;
+    static index(s: string, substr: string): number;
+    static toLower(s: string): string;
+    static toUpper(s: string): string;
+    static subString(s: string, strat: number, end: number): string;
+    static equals(expect: string, actual: string): boolean;
+    static trim(str: string): string;
+    static toBytes(str: string, encoding: BufferEncoding): Buffer;
+}