showAiFieldBadge function infrastructure

function showAiFieldBadge(element: HTMLElement): void {
  // Remove any existing AI badge on this element
  const existingBadge = element.parentElement?.querySelector(
    "[data-fill-all-ai-badge]",
  );
  existingBadge?.remove();

  const badge = document.createElement("span");
  badge.setAttribute("data-fill-all-ai-badge", "1");
  badge.title = "Preenchido por IA (Fill All) — clique para remover";
  badge.style.cssText = `
    display: inline-flex;
    align-items: center;
    gap: 3px;
    position: absolute;
    font-size: 10px;
    font-family: system-ui, -apple-system, sans-serif;
    font-weight: 700;
    padding: 2px 6px 2px 5px;
    border-radius: 4px;
    z-index: 2147483646;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: #fff;
    box-shadow: 0 1px 4px rgba(99,102,241,0.45);
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
    pointer-events: auto;
    line-height: 1.4;
    letter-spacing: 0.1px;
  `;
  badge.innerHTML = `<span style="font-size:11px">✨</span>AI<span style="opacity:0.7;font-size:9px;margin-left:2px">×</span>`;

  function positionBadge(): void {
    const rect = element.getBoundingClientRect();
    badge.style.top = `${rect.top + window.scrollY - 20}px`;
    badge.style.left = `${rect.right + window.scrollX - 42}px`;
  }

  positionBadge();
  badge.style.position = "absolute";
  document.body.appendChild(badge);

  badge.addEventListener("click", () => badge.remove());
}