Function formatDuration

apps/vis/web/src/util/time.ts:36–43

(ms: number | null | undefined)

/** Format a duration in ms as a compact human string (e.g. "840ms", "2.4s", "1m03s"). */
export function formatDuration(ms: number | null | undefined): string {
  if (ms === null || ms === undefined || !Number.isFinite(ms)) return '—';
  if (ms < 1000) return `${Math.round(ms)}ms`;
  if (ms < 60000) return `${(ms / 1000).toFixed(1)}s`;
  const m = Math.floor(ms / 60000);
  const s = Math.floor((ms % 60000) / 1000);
  return `${m}m${String(s).padStart(2, '0')}s`;
}

/** Format a token count compactly (e.g. "512", "12.4k", "1.20M"). */
export function formatTokens(n: number | null | undefined): string {