Function formatTime

frontend/src/utils/format.ts:39–45

(totalSeconds: number)

 * @param totalSeconds - Elapsed time in seconds (may be fractional; truncated).
 */
export function formatTime(totalSeconds: number): string {
  const total = Math.max(0, Math.floor(isFinite(totalSeconds) ? totalSeconds : 0));
  const hours = Math.floor(total / 3600);
  const minutes = Math.floor((total % 3600) / 60);
  const secs = total % 60;
  return [hours, minutes, secs].map((p) => String(p).padStart(2, '0')).join(':');
}

/**
 * Format a transmission progress value (0–100) as a percentage string like "42%".