/** Safe for Server Components — keep separate from `global.tsx` (`"use client"`). */
export function formatDate(date: Date | string | null) {
  if (!date) return "";

  const parsedDate = typeof date === "string" ? new Date(date) : date;

  if (isNaN(parsedDate.getTime())) return "";

  const year = parsedDate.getFullYear();
  const month = String(parsedDate.getMonth() + 1).padStart(2, "0");
  const day = String(parsedDate.getDate()).padStart(2, "0");

  return `${year}-${month}-${day}`;
}