validateRecipient method
Classify a recipient via the validateAddress bridge fn — the same audited
Address::parse gate composePaymentUri lowers through. The wallet's OWN
network is supplied here, never by the screen, so a cross-network address
fails typed exactly as a compose would. Sync + local: no future, no network.
Implementation
@override
ValidatedAddress validateRecipient(String address) =>
validateAddress(address: address, network: _network);