- Add fists weapon viewmodel with idle/hit animation states (220ms hit pose)
- Implement mouse-wheel weapon cycling that skips unowned weapons
- Add 33% chance for killed guards to drop ammo-clip pickups at death location
- Introduce campaign carry-over system preserving weapons/ammo/health between missions
- Fix stale 'attack' state clearing when enemies lose sight of player
- Extend save/load serialization to persist nextPickupId counter
- Update level-e1m1 with pistol pickup at spawn point
- Add comprehensive test coverage for all new features in verifyWolfenstein.js
