- Fix item swapping edge case
- Document more assumptions/edge cases
- fmt and clippy
- s/ServerGeneral::GroupInvite/ServerGeneral::Invite/
- Use `Client::current` in `Client::is_dead`
- Accept/decline buttons that submit the proper messages
- A phase2 screen that renders the (item, quantity) pairs as text
- More checks in the trade state machine server-side.