QR Print Page: add expiry notice

resources/js/admin/mobile/QrPrintPage.tsx

@@ -132,6 +132,13 @@ export default function MobileQrPrintPage() {
             {qrUrl}
           </Text>
         ) : null}
+        <Text fontSize="$xs" color={muted} marginTop="$1">
+          {selectedInvite?.expires_at
+            ? t('events.qr.expiresAt', 'Valid until {{date}}', {
+                date: formatExpiry(selectedInvite.expires_at),
+              })
+            : t('events.qr.noExpiry', 'No expiry configured')}
+        </Text>
         <Text fontSize="$xs" color={muted}>
           {t('events.qr.description', 'Scan to access the event guest app.')}
         </Text>
@@ -238,6 +245,12 @@ export default function MobileQrPrintPage() {
   );
 }
 
+function formatExpiry(value: string): string {
+  const date = new Date(value);
+  if (Number.isNaN(date.getTime())) return value;
+  return date.toLocaleString(undefined, { day: '2-digit', month: 'short', year: 'numeric', hour: '2-digit', minute: '2-digit' });
+}
+
 function FormatSelection({
   layouts,
   selectedFormat,