更新 package.json 版本号至 0.0.12；优化 isLocalhost 函数以处理空主机名；修复 handleRequest 中对 dns.hostName 的访问；在轻代码列表中添加 code 字段；更新示例路由描述

src/routes-simple/page-proxy.ts

@@ -145,7 +145,7 @@ export const handleRequest = async (req: http.IncomingMessage, res: http.ServerR
 
   let user, app;
   let domainApp = false;
-  const isDev = isLocalhost(dns.hostName);
+  const isDev = isLocalhost(dns?.hostName);
   if (isDev) {
     console.debug('开发环境访问:', req.url, 'Host:', dns.hostName);
   } else {