frontend/src/utils/chatTime.ts

export function nowIso(): string {
  return new Date().toISOString();
}

export function formatTurnTime(value?: string): string {
  if (!value) return "";
  const d = new Date(value);
  if (Number.isNaN(d.getTime())) return "";
  return d.toLocaleTimeString([], { hour: "2-digit", minute: "2-digit" });
}