部署步骤：
1. 登录 dash.cloudflare.com → Workers & Pages → Create Worker
2. 将下方代码全选替换，点「Deploy」
3. 复制 Worker 网址（格式：https://xxx.workers.dev）填入上方输入框并保存

export default {
  async fetch(request) {
    if (request.method === 'OPTIONS') {
      return new Response(null, { headers: corsHeaders() });
    }
    const url = new URL(request.url);
    const target = 'https://api.tikhub.io' + url.pathname + url.search;
    const resp = await fetch(target, {
      method: request.method,
      headers: request.headers,
    });
    const newResp = new Response(resp.body, resp);
    Object.entries(corsHeaders()).forEach(([k,v]) =>
      newResp.headers.set(k, v));
    return newResp;
  }
};
function corsHeaders() {
  return {
    'Access-Control-Allow-Origin': '*',
    'Access-Control-Allow-Methods': 'GET,POST,OPTIONS',
    'Access-Control-Allow-Headers': 'Authorization,Content-Type',
  };
}