Add diagonal PlayerAction variants (MoveNortheast, MoveNorthwest,
MoveSoutheast, MoveSouthwest) and TilePosition::all_neighbors()
returning all 8 surrounding tiles. Genre-expected for immersive sim.
Establishes the movement pattern before pathfinding is built on top.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Add roundtrip tests for all PlayerAction variants (Hoshe #6)
- Add roundtrip tests for all EntityKind variants (Hoshe #6)
- Add day wraparound at midnight edge case test (Hoshe #7)
- Add day() calculation test (Hoshe #7)
- Add out-of-order input rejection test (Hoshe #7)
- Total: 15 → 20 tests
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>