Function formatDuration

frontend/src/components/timeline/NetworkPanel.tsx:105–109

(ms?: number)

};

const formatDuration = (ms?: number): string => {
  if (ms === undefined || ms < 0) return '-';
  if (ms < 1000) return `${Math.round(ms)}ms`;
  return `${(ms / 1000).toFixed(2)}s`;
};

const formatBytes = (bytes?: number): string => {
  if (bytes === undefined || bytes < 0) return '-';