BUG-01: Unknown cards no longer default to "Creature". enrich_card() now
sets type_line="Unknown" for cards without Scryfall data. Added
can_attack_or_block() method to Card — only cards with "Creature" in
type_line can participate in combat. Engine combat uses
can_attack_or_block() instead of is_creature().
BUG-02: Implemented get_legal_moves() and apply_move() in
CommanderGameState with actual game logic — land drops, spell casting
(with mana checking), commander casting from command zone, attack
declarations, and instant-speed responses. Replaces the former
pass-only stubs.
BUG-05: Instants and sorceries now go to graveyard after resolution
instead of being placed on the battlefield as permanents. Added
is_permanent(), is_instant(), is_sorcery() helpers to Card model.
Includes 48 new regression tests covering all three bugs plus
integration tests verifying artifacts/unknown cards never appear in
combat. Fixed existing test_engine.py to match current engine API.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
