export function formatCount(n: number): string {
  if (n >= 100_000_000) return (n / 100_000_000).toFixed(1) + '亿';
  if (n >= 10_000) return (n / 10_000).toFixed(1) + '万';
  return String(n);
}

export function formatDuration(seconds: number): string {
  const m = Math.floor(seconds / 60);
  const s = seconds % 60;
  return `${m}:${String(s).padStart(2, '0')}`;
}

export function formatTime(ctime: number): string {
  const d = new Date(ctime * 1000);
  return `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}-${String(d.getDate()).padStart(2, '0')}`;
}