Multiplayer fixes & polish
- Fixed needing to restart the game to host a new Steam match after exiting
- Victory screen now correctly shows Last Pirate Standing when you win by eliminating the last human opponent
- Guests should reliably see their mission (no more placeholder text)
- DEPLOY card trades work more reliably for host and guest: correct 3-coin detection, no double bonus units and conquest coins awarded more reliably
- Eliminating a player transfers their coins to you more reliably (especially for guests)
- Lobbies and player names now show your Steam username instead of long player IDs