addEventListener("fetch", event => {
  event.respondWith(handleRequest(event.request));
});

async function handleRequest(request) {
  // 只处理 GET 请求，返回内置前端页面
  if (request.method === "GET") {
    return new Response(htmlContent, {
      headers: { "Content-Type": "text/html;charset=UTF-8" },
    });
  } else {
    // 其他请求一律 404
    return new Response("Not Found", { status: 404 });
  }
}

const ht...