function textOf(node) {
  return ((node && (node.innerText || node.textContent || '')) || '').replace(/\s+/g, ' ').trim();
}

function attrsText(el) {
  if (!el || !el.attributes) return '';
  return Array.from(el.attributes).map((attr) => `${attr.name}=${attr.value}`).join(' ');
}

function isVisible(el) {
  if (!el || !el.getBoundingClientRect) return false;
  const rect = el.getBoundingClientRect();
  const style = window.getComputedStyle(el);
  return rect.width > 0 && rect.height > 0 && style.display !== 'none' && style.visibility !== 'hidden';
}

function walkRoots(root, rows, seen) {
  if (!root || seen.has(root)) return;
  seen.add(root);

  const walker = document.createTreeWalker(root, NodeFilter.SHOW_ELEMENT);
  let node = walker.currentNode;
  while (node) {
    if (node.nodeType === Node.ELEMENT_NODE && node.tagName) rows.push(node);
    if (node.shadowRoot) walkRoots(node.shadowRoot, rows, seen);
    if ((node.tagName || '').toLowerCase() === 'slot' && node.assignedElements) {
      for (const assigned of node.assignedElements({ flatten: true })) {
        walkRoots(assigned, rows, seen);
      }
    }
    node = walker.nextNode();
  }
}

const rows = [];
walkRoots(document, rows, new Set());

const seen = new Set();
return rows
  .filter((el) => {
    const haystack = `${el.tagName || ''} ${attrsText(el)} ${textOf(el)}`;
    return isVisible(el) && /kat-alert|alert|toast|notification|已删除|已经删除|15\s*分钟|success/i.test(haystack);
  })
  .map((el) => textOf(el) || attrsText(el))
  .filter((text) => text && !seen.has(text) && seen.add(text))
  .slice(0, 30);