Function sparkline

src/cli/maintain-report-export.ts:27–31

(trend: number[])

  d === 'rising' ? 'rising ↑' : d === 'falling' ? 'cooling ↓' : 'steady →';

function sparkline(trend: number[]): string {
  const max = Math.max(1, ...trend);
  const b = '▁▂▃▄▅▆▇█';
  return trend.map(n => b[Math.min(7, Math.round((n / max) * 7))]).join('');
}

/** Markdown report — paste into a PR / issue / team chat. PURE. */
export function buildMaintainReportMarkdown(d: MaintainReportData): string {