feat: 实现Vue驱动的云存储系统初始功能

- 后端: Node.js + Express + SQLite架构
- 前端: Vue 3 + Axios实现
- 功能: 用户认证、文件上传/下载、分享链接、密码重置
- 安全: 密码加密、分享链接过期机制、缓存一致性
- 部署: Docker + Nginx容器化配置
- 测试: 完整的边界测试、并发测试和状态一致性测试

backend/routes/health.js

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+/**
+ * 健康检查和公共配置路由
+ * 提供服务健康状态和公共配置信息
+ */
+
+const express = require('express');
+const router = express.Router();
+const { SettingsDB } = require('../database');
+
+/**
+ * 健康检查端点
+ * GET /api/health
+ */
+router.get('/health', (req, res) => {
+  res.json({ success: true, message: 'Server is running' });
+});
+
+/**
+ * 获取公开的系统配置（不需要登录）
+ * GET /api/config
+ */
+router.get('/config', (req, res) => {
+  const maxUploadSize = parseInt(SettingsDB.get('max_upload_size') || '10737418240');
+  res.json({
+    success: true,
+    config: {
+      max_upload_size: maxUploadSize
+    }
+  });
+});
+
+/**
+ * 获取公开的全局主题设置（不需要登录）
+ * GET /api/public/theme
+ */
+router.get('/public/theme', (req, res) => {
+  try {
+    const globalTheme = SettingsDB.get('global_theme') || 'dark';
+    res.json({
+      success: true,
+      theme: globalTheme
+    });
+  } catch (error) {
+    console.error('获取全局主题失败:', error);
+    res.status(500).json({
+      success: false,
+      message: '获取主题失败'
+    });
+  }
+});
+
+module.exports = router;

backend/routes/index.js

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+/**
+ * 路由模块索引
+ *
+ * 本项目的路由目前主要定义在 server.js 中。
+ * 此目录用于未来路由拆分的模块化重构。
+ *
+ * 建议的路由模块拆分方案：
+ *
+ * 1. routes/health.js - 健康检查和公共配置
+ *    - GET /api/health
+ *    - GET /api/config
+ *    - GET /api/public/theme
+ *
+ * 2. routes/auth.js - 认证相关
+ *    - POST /api/login
+ *    - POST /api/register
+ *    - POST /api/logout
+ *    - POST /api/refresh-token
+ *    - POST /api/password/forgot
+ *    - POST /api/password/reset
+ *    - GET /api/verify-email
+ *    - POST /api/resend-verification
+ *    - GET /api/captcha
+ *    - GET /api/csrf-token
+ *
+ * 3. routes/user.js - 用户相关
+ *    - GET /api/user/profile
+ *    - GET /api/user/theme
+ *    - POST /api/user/theme
+ *    - POST /api/user/update-oss
+ *    - POST /api/user/test-oss
+ *    - GET /api/user/oss-usage
+ *    - POST /api/user/change-password
+ *    - POST /api/user/update-username
+ *    - POST /api/user/switch-storage
+ *
+ * 4. routes/files.js - 文件操作
+ *    - GET /api/files
+ *    - POST /api/files/rename
+ *    - POST /api/files/mkdir
+ *    - POST /api/files/folder-info
+ *    - POST /api/files/delete
+ *    - GET /api/files/upload-signature
+ *    - POST /api/files/upload-complete
+ *    - GET /api/files/download-url
+ *    - GET /api/files/download
+ *    - POST /api/upload
+ *
+ * 5. routes/share.js - 分享功能
+ *    - POST /api/share/create
+ *    - GET /api/share/my
+ *    - DELETE /api/share/:id
+ *    - GET /api/share/:code/theme
+ *    - POST /api/share/:code/verify
+ *    - POST /api/share/:code/list
+ *    - POST /api/share/:code/download
+ *    - GET /api/share/:code/download-url
+ *    - GET /api/share/:code/download-file
+ *
+ * 6. routes/admin.js - 管理员功能
+ *    - GET /api/admin/settings
+ *    - POST /api/admin/settings
+ *    - POST /api/admin/settings/test-smtp
+ *    - GET /api/admin/health-check
+ *    - GET /api/admin/storage-stats
+ *    - GET /api/admin/users
+ *    - GET /api/admin/logs
+ *    - GET /api/admin/logs/stats
+ *    - POST /api/admin/logs/cleanup
+ *    - POST /api/admin/users/:id/ban
+ *    - DELETE /api/admin/users/:id
+ *    - POST /api/admin/users/:id/storage-permission
+ *    - GET /api/admin/users/:id/files
+ *    - GET /api/admin/shares
+ *    - DELETE /api/admin/shares/:id
+ *    - GET /api/admin/check-upload-tool
+ *    - POST /api/admin/upload-tool
+ *
+ * 使用示例（在 server.js 中）：
+ * ```javascript
+ * const healthRoutes = require('./routes/health');
+ * app.use('/api', healthRoutes);
+ * ```
+ */
+
+const healthRoutes = require('./health');
+
+module.exports = {
+  healthRoutes
+};