createFieldLabelBadge function

function createFieldLabelBadge(
  target: HTMLElement,
  label: string,
): HTMLElement {
  const rect = target.getBoundingClientRect();
  const badge = document.createElement("div");
  badge.textContent = label;

  const top = rect.top - 20;
  const left = rect.left;

  badge.style.cssText = `
    position: fixed;
    top: ${Math.max(2, top)}px;
    left: ${left}px;
    background: rgba(79, 70, 229, 0.9);
    color: #fff;
    font-size: 10px;
    font-family: system-ui, -apple-system, sans-serif;
    font-weight: 600;
    padding: 1px 6px;
    border-radius: 3px;
    z-index: 2147483645;
    pointer-events: none;
    white-space: nowrap;
    max-width: 180px;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.5;
    box-shadow: 0 1px 4px rgba(0,0,0,0.25);
    letter-spacing: 0.2px;
  `;
  document.body.appendChild(badge);
  return badge;
}