- MessagesCubit: 1:1 conversation over MessageTransport. Filters the shared
inbox to the peer; tags our own sends with our pubkey (NIP-17 wraps don't come
back to the sender) so the UI can align bubbles; degrades gracefully offline.
- ChatScreen (mockup 10): message bubbles (mine right / peer left) + a composer;
opens a session lazily, shows 'set up sharing' when there's no relay.
- Entry point: a 'Message' button on each offer card (hidden on your own
listings) → /chat/:pubkey.
- Routing + i18n en/es/pt.
Tests: 5 cubit (send/receive/order/filter/offline) + chat offline + market, green.
vjrj
efd64c4da4