export function formatBytes(bytes: number): string {
  if (!Number.isFinite(bytes)) return "0 B";
  const units = ["B", "KB", "MB", "GB"];
  let value = bytes;
  let idx = 0;
  while (value >= 1024 && idx < units.length - 1) {
    value /= 1024;
    idx += 1;
  }
  const digits = value >= 10 || idx === 0 ? 0 : 1;
  return `${value.toFixed(digits)} ${units[idx]}`;
}