// QR modal — generates a scannable QR for any URL using a free QR service.
// Uses qrserver.com (Google chart deprecated). All client-side; no auth needed.
window.showQr = function(url) {
const existing = document.getElementById('qr-modal');
if (existing) existing.remove();
const root = document.createElement('div');
root.id = 'qr-modal';
root.style.cssText = 'position:fixed;inset:0;background:rgba(0,0,0,.7);z-index:9999;display:grid;place-items:center;animation:qrfade .15s ease-out';
const enc = encodeURIComponent(url);
const src = `https://api.qrserver.com/v1/create-qr-code/?size=400x400&margin=0&data=${enc}`;
root.innerHTML = `
Scan to open on phone
${esc(url)}
`;
function esc(s) { return String(s).replace(/[&<>"]/g, c => ({'&':'&','<':'<','>':'>','"':'"'}[c])); }
root.addEventListener('click', e => { if (e.target === root) root.remove(); });
document.body.appendChild(root);
};