The escrow mint was silently the buyer's preferred/first trusted mint
(useCashuEscrow: prefs.preferredMintUrl || mints[0].url) with no UI, even
though the seller redeems there. Now:
- the escrow dialog shows the mint and lets the buyer pick from their
trusted mints (defaults to their preference);
- a mint whose NUT-06 info advertises no NUT-11 (P2PK) support is blocked
with a clear message before minting (cashuEscrow.mintSupportsP2PK);
- the create call uses the selected mint.
Still open (scoped separately): consult a seller-advertised mint and
seller-side receive from an unfamiliar mint. Recorded in the audit.
ac1b22674c