BarevClub/apps/miniapp-pro/src/qr.tsx

import QRCode from 'qrcode';
import { useEffect, useState } from 'react';

/** QR как SVG — чёткий на любом экране, без canvas */
export function Qr({ value, size = 200, label }: { value: string; size?: number; label: string }) {
  const [svg, setSvg] = useState('');
  useEffect(() => {
    let alive = true;
    void QRCode.toString(value, { type: 'svg', margin: 1, errorCorrectionLevel: 'M', color: { dark: '#4A1028', light: '#ffffff' } }).then((s) => {
      if (alive) setSvg(s);
    });
    return () => {
      alive = false;
    };
  }, [value]);
  return <div role="img" aria-label={label} style={{ width: size, height: size }} dangerouslySetInnerHTML={{ __html: svg }} />;
}