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/xmlbuilder/lib/XMLDTDAttList.js

@@ -0,0 +1,55 @@
+// Generated by CoffeeScript 1.12.7
+(function() {
+  var NodeType, XMLDTDAttList, XMLNode,
+    extend = function(child, parent) { for (var key in parent) { if (hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; },
+    hasProp = {}.hasOwnProperty;
+
+  XMLNode = require('./XMLNode');
+
+  NodeType = require('./NodeType');
+
+  module.exports = XMLDTDAttList = (function(superClass) {
+    extend(XMLDTDAttList, superClass);
+
+    function XMLDTDAttList(parent, elementName, attributeName, attributeType, defaultValueType, defaultValue) {
+      XMLDTDAttList.__super__.constructor.call(this, parent);
+      if (elementName == null) {
+        throw new Error("Missing DTD element name. " + this.debugInfo());
+      }
+      if (attributeName == null) {
+        throw new Error("Missing DTD attribute name. " + this.debugInfo(elementName));
+      }
+      if (!attributeType) {
+        throw new Error("Missing DTD attribute type. " + this.debugInfo(elementName));
+      }
+      if (!defaultValueType) {
+        throw new Error("Missing DTD attribute default. " + this.debugInfo(elementName));
+      }
+      if (defaultValueType.indexOf('#') !== 0) {
+        defaultValueType = '#' + defaultValueType;
+      }
+      if (!defaultValueType.match(/^(#REQUIRED|#IMPLIED|#FIXED|#DEFAULT)$/)) {
+        throw new Error("Invalid default value type; expected: #REQUIRED, #IMPLIED, #FIXED or #DEFAULT. " + this.debugInfo(elementName));
+      }
+      if (defaultValue && !defaultValueType.match(/^(#FIXED|#DEFAULT)$/)) {
+        throw new Error("Default value only applies to #FIXED or #DEFAULT. " + this.debugInfo(elementName));
+      }
+      this.elementName = this.stringify.name(elementName);
+      this.type = NodeType.AttributeDeclaration;
+      this.attributeName = this.stringify.name(attributeName);
+      this.attributeType = this.stringify.dtdAttType(attributeType);
+      if (defaultValue) {
+        this.defaultValue = this.stringify.dtdAttDefault(defaultValue);
+      }
+      this.defaultValueType = defaultValueType;
+    }
+
+    XMLDTDAttList.prototype.toString = function(options) {
+      return this.options.writer.dtdAttList(this, this.options.writer.filterOptions(options));
+    };
+
+    return XMLDTDAttList;
+
+  })(XMLNode);
+
+}).call(this);