// A running clock, compactly: "42s", "3m07s", "2h05m". The operations board's
// runner header and every in-flight row read it. (Not formatDuration's
// "3:07": that one is a media duration, and it renders 0 as "".)
export function formatElapsed(ms: number): string {
  const s = Math.max(0, Math.floor(ms / 1000));
  if (s < 60) return `${s}s`;
  const m = Math.floor(s / 60);
  if (m < 60) {
    const rem = s % 60;
    return rem === 0 ? `${m}m` : `${m}m${String(rem).padStart(2, "0")}s`;
  }
  const h = Math.floor(m / 60);
  return `${h}h${String(m % 60).padStart(2, "0")}m`;
}