Function formatWallClock

apps/vis/web/src/util/time.ts:28–33

(epochMs: number)

/** Format an epoch-ms timestamp as HH:MM:SS (wall clock). */
export function formatWallClock(epochMs: number): string {
  if (!epochMs || !Number.isFinite(epochMs)) return '--:--:--';
  const d = new Date(epochMs);
  const pad = (n: number) => String(n).padStart(2, '0');
  return `${pad(d.getHours())}:${pad(d.getMinutes())}:${pad(d.getSeconds())}`;
}

/** Format a duration in ms as a compact human string (e.g. "840ms", "2.4s", "1m03s"). */
export function formatDuration(ms: number | null | undefined): string {