Changed forced_action from single item to FIFO queue to support
scenarios where multiple forced actions are needed simultaneously:
- forced_actions: list[ForcedAction] replaces forced_action: ForcedAction | None
- Added queue management methods:
- has_forced_action() - check if queue has pending actions
- get_current_forced_action() - get first action without removing
- add_forced_action(action) - add to end of queue
- pop_forced_action() - remove and return first action
- clear_forced_actions() - clear all pending actions
- Updated engine, turn_manager, rules_validator, and visibility filter
- Added 8 new tests for forced action queue including double knockout scenario
This fixes the bug where simultaneous knockouts (e.g., mutual poison damage)
would lose one player's select_active action due to overwriting.
795 tests passing.
SECURITY: Implement hidden information filtering to prevent cheating.
- Create VisibleGameState, VisiblePlayerState, VisibleZone models
- get_visible_state(game, player_id): filtered view for a player
- get_spectator_state(game): filtered view for spectators
Hidden Information (NEVER exposed):
- Opponent's hand contents (count only)
- All deck contents and order
- All prize card contents
- Energy deck order
Public Information (always visible):
- Active and benched Pokemon (full details)
- Discard piles (full contents)
- Energy zone (available energy)
- Scores, turn info, phase
- Stadium in play
- 44 security-critical tests verifying no information leakage
- Tests check JSON serialization for hidden card ID leaks
- Also adds test for configurable burn damage
Completes HIGH-008 and TEST-012 from PROJECT_PLAN.json
Updates security checklist: 4/5 items now verified
