Public QR scanner example: avoid real login codes

To demonstrate a QR Scanner issue publicly, create a code for harmless text or an example-domain URL. State the decoded payload you expect and the actual result, plus image size and scan conditions if readability is the problem. Do not share a live sign-in, payment, or access QR code; a screenshot may grant access or reveal private data. A synthetic code can reproduce scanner behavior without exposing a real account or destination.