(async () => {
  const sleep = ms => new Promise(r => setTimeout(r, ms));
  // 等正文渲染
  let txt = '';
  for (let i = 0; i < 20; i++) {
    txt = (document.body ? document.body.innerText : '') || '';
    if (txt.length > 2000) break;
    await sleep(800);
  }
  const out = { href: location.href, title: document.title, len: txt.length, hits: [], all: '' };
  const clean = txt.replace(/\r/g, '');
  out.all = clean.slice(0, 60000);
  const kws = ['重复', '铺货', '同款', '相同商品', '重复发布', '重复铺货'];
  const lines = clean.split('\n').map(s => s.trim()).filter(Boolean);
  const seen = new Set();
  for (let i = 0; i < lines.length; i++) {
    const l = lines[i];
    if (kws.some(k => l.includes(k))) {
      const ctx = lines.slice(Math.max(0, i - 1), Math.min(lines.length, i + 3)).join(' ⏎ ');
      const key = l.slice(0, 60);
      if (seen.has(key)) continue;
      seen.add(key);
      out.hits.push({ line: l.slice(0, 600), ctx: ctx.slice(0, 1200) });
    }
  }
  return out;
})()