docs(website): 重构关于页面布局和内容

- 更新页面布局，优化导航栏和面包屑导航
- 重新组织页面内容，突出公司使命和价值观
- 添加发展历程和核心团队介绍
- 更新合作伙伴展示方式
- 调整页脚内容，增加社交媒体链接

backend/src/middleware/auth.js

@@ -0,0 +1,54 @@
+const jwt = require('jsonwebtoken');
+const { jwtConfig } = require('../config/config');
+
+// 认证中间件
+const authenticate = (req, res, next) => {
+  try {
+    // 从请求头获取token
+    const authHeader = req.headers.authorization;
+    if (!authHeader || !authHeader.startsWith('Bearer ')) {
+      return res.status(401).json({
+        code: 401,
+        message: '未提供认证token'
+      });
+    }
+    
+    const token = authHeader.split(' ')[1];
+    
+    // 验证token
+    const decoded = jwt.verify(token, jwtConfig.secret);
+    req.user = decoded;
+    next();
+  } catch (error) {
+    return res.status(401).json({
+      code: 401,
+      message: '无效的认证token'
+    });
+  }
+};
+
+// 角色权限检查中间件
+const checkRole = (roles) => {
+  return (req, res, next) => {
+    if (!req.user) {
+      return res.status(401).json({
+        code: 401,
+        message: '未认证'
+      });
+    }
+    
+    if (!roles.includes(req.user.userType)) {
+      return res.status(403).json({
+        code: 403,
+        message: '权限不足'
+      });
+    }
+    
+    next();
+  };
+};
+
+module.exports = {
+  authenticate,
+  checkRole
+};

backend/src/middleware/errorHandler.js

@@ -0,0 +1,31 @@
+const { errorResponse } = require('../utils/response');
+
+// 错误处理中间件
+const errorHandler = (err, req, res, next) => {
+  // 记录错误日志
+  console.error(err.stack);
+  
+  // 默认错误状态码和消息
+  let statusCode = 500;
+  let message = '服务器内部错误';
+  
+  // 根据错误类型设置状态码和消息
+  if (err.name === 'ValidationError') {
+    statusCode = 400;
+    message = '请求参数验证失败';
+  } else if (err.name === 'UnauthorizedError') {
+    statusCode = 401;
+    message = '未授权访问';
+  } else if (err.name === 'ForbiddenError') {
+    statusCode = 403;
+    message = '访问被拒绝';
+  } else if (err.name === 'NotFoundError') {
+    statusCode = 404;
+    message = '资源未找到';
+  }
+  
+  // 返回错误响应
+  res.status(statusCode).json(errorResponse(message, statusCode));
+};
+
+module.exports = errorHandler;

backend/src/middleware/healthCheck.js

@@ -0,0 +1,13 @@
+const express = require('express');
+const router = express.Router();
+
+// 健康检查端点
+router.get('/health', (req, res) => {
+  res.status(200).json({
+    status: 'OK',
+    timestamp: new Date().toISOString(),
+    uptime: process.uptime()
+  });
+});
+
+module.exports = router;

backend/src/middleware/logger.js

@@ -0,0 +1,36 @@
+const fs = require('fs');
+const path = require('path');
+const { logConfig } = require('../config/config');
+
+// 创建日志目录
+const logDir = path.join(__dirname, '../../logs');
+if (!fs.existsSync(logDir)) {
+  fs.mkdirSync(logDir, { recursive: true });
+}
+
+// 创建日志文件流
+const logStream = fs.createWriteStream(path.join(logDir, 'app.log'), { flags: 'a' });
+
+// 日志中间件
+const logger = (req, res, next) => {
+  // 只在开发环境记录详细日志
+  if (process.env.NODE_ENV === 'development' || logConfig.level === 'debug') {
+    const logEntry = {
+      timestamp: new Date().toISOString(),
+      method: req.method,
+      url: req.url,
+      ip: req.ip,
+      userAgent: req.get('User-Agent')
+    };
+    
+    // 写入日志文件
+    logStream.write(JSON.stringify(logEntry) + '\n');
+    
+    // 控制台输出
+    console.log(`${logEntry.timestamp} - ${logEntry.method} ${logEntry.url} - ${logEntry.ip}`);
+  }
+  
+  next();
+};
+
+module.exports = logger;