Add detailed 404 error logging for invalid requests

- Log invalid request method, URL, path, and parameters
- Display query parameters and request body if present
- Show client IP and User-Agent information
- Return helpful error message with available endpoints
- Format console output with clear visual separators

server.js

@@ -34,6 +34,64 @@ app.get('/', (req, res) => {
   });
 });
 
+// 404 处理 - 捕获所有未匹配的路由
+app.use((req, res, next) => {
+  const errorInfo = {
+    timestamp: new Date().toISOString(),
+    method: req.method,
+    url: req.originalUrl || req.url,
+    path: req.path,
+    query: req.query,
+    params: req.params,
+    body: req.body,
+    headers: {
+      'content-type': req.headers['content-type'],
+      'user-agent': req.headers['user-agent'],
+      'origin': req.headers['origin'],
+      'referer': req.headers['referer']
+    },
+    ip: req.ip || req.connection.remoteAddress
+  };
+
+  console.error('\n' + '='.repeat(80));
+  console.error('❌ 非法请求地址');
+  console.error('='.repeat(80));
+  console.error(`时间: ${errorInfo.timestamp}`);
+  console.error(`方法: ${errorInfo.method}`);
+  console.error(`地址: ${errorInfo.url}`);
+  console.error(`路径: ${errorInfo.path}`);
+  
+  if (Object.keys(errorInfo.query).length > 0) {
+    console.error(`查询参数: ${JSON.stringify(errorInfo.query, null, 2)}`);
+  }
+  
+  if (errorInfo.body && Object.keys(errorInfo.body).length > 0) {
+    console.error(`请求体: ${JSON.stringify(errorInfo.body, null, 2)}`);
+  }
+  
+  console.error(`客户端IP: ${errorInfo.ip}`);
+  console.error(`User-Agent: ${errorInfo.headers['user-agent'] || 'N/A'}`);
+  
+  if (errorInfo.headers.referer) {
+    console.error(`来源: ${errorInfo.headers.referer}`);
+  }
+  
+  console.error('='.repeat(80) + '\n');
+
+  logError('Invalid request path', errorInfo);
+
+  res.status(404).json({
+    error: 'Not Found',
+    message: `路径 ${req.method} ${req.path} 不存在`,
+    timestamp: errorInfo.timestamp,
+    availableEndpoints: [
+      'GET /v1/models',
+      'POST /v1/chat/completions'
+    ]
+  });
+});
+
+// 错误处理中间件
 app.use((err, req, res, next) => {
   logError('Unhandled error', err);
   res.status(500).json({