Closes the loop: until now nothing in the UI could create a contact, so the
list stayed empty unless the peer initiated.
A completed receive names its sender and a completed delivery names its
receiver, so both sides get the suggestion. Declining is persisted, or every
later transfer with the same device would re-ask a question already
answered; pairing deliberately afterwards clears that.
The suggestion sheet ranks below the two other prompts, since nobody is
waiting on the answer.
Device list, detail, and block list under Settings, plus the two sheets:
an incoming offer and a device asking to be remembered. Both are
answer-only, since swiping away would leave the sender waiting.
Accepting an offer routes the released ticket into the ordinary receive
path, so the platform still chooses the destination. The prompt does not
ask a second time; it only falls back to the review sheet when the
destination is unusable.
