What a visitor actually sees
When a private Item is scanned:- Nobody signed in — the visitor is sent to the QRtub sign-in screen, with a return path back to the scanned code. After signing in successfully, they land on the page.
- Signed in, but not a member of the owning team — they get a plain not-found page. They are not told the Item exists, who owns it, or that they lack permission. There is no request-access flow.
- Signed-in team member — the page renders normally.