function getNested(obj: any, path: string): any {
  return path.split(".").reduce((o, k) => o?.[k], obj);
}

export function applyDisplayFormat(item: any, format: string): string {
  if (!item || typeof item !== "object") return String(item ?? "");
  return format.replace(/\{([\w.]+)\}/g, (_, key) => {
    const val = getNested(item, key);
    return val != null ? String(val) : "";
  });
}