Fix async handling in game walkthrough script

- Add await to engine.execute_action() calls (energy attach and attack)
- Update entry point to use asyncio.run()
- Fix game creation result handling (use game_creation.game)
- Fix AttachEnergyAction parameter name (energy_card_id)

backend/references/game_walkthrough.py

@@ -25,6 +25,7 @@ if str(backend_dir) not in sys.path:
 # IMPORTS
 # =============================================================================
 
+import asyncio
 import uuid
 from typing import Callable
 
@@ -525,7 +526,7 @@ def build_player2_deck(
 # =============================================================================
 
 
-def run_walkthrough():
+async def run_walkthrough():
     """Run the interactive game walkthrough."""
     clear_screen()
     print_divider("*")
@@ -707,16 +708,17 @@ The engine will:
         "player2": p2_energy,
     }
 
-    game = engine.create_game(
+    game_creation = engine.create_game(
         player_ids=["player1", "player2"],
         decks=decks,
         energy_decks=energy_decks,
         card_registry=card_registry,
     )
+    game = game_creation.game
 
-    print_result(f"Game created! ID: {game.game_id[:8]}...")
-    print_result(f"Turn order: {game.turn_order}")
-    print_result(f"Current phase: {game.phase.value}")
+    print_result(f"Game created! ID: {game_creation.game.game_id[:8]}...")
+    print_result(f"Turn order: {game_creation.game.turn_order}")
+    print_result(f"Current phase: {game_creation.game.phase.value}")
 
     if not wait_for_continue():
         return
@@ -877,12 +879,12 @@ Let's attach energy to our active Pokemon!
 
         # Create and execute attach energy action
         action = AttachEnergyAction(
-            energy_instance_id=energy_card.instance_id,
+            energy_card_id=energy_card.instance_id,
             target_pokemon_id=active_pokemon.instance_id,
             from_energy_zone=True,
         )
 
-        result = engine.execute_action(game, game.current_player_id, action)
+        result = await engine.execute_action(game, game.current_player_id, action)
 
         if result.success:
             print_result(
@@ -927,7 +929,7 @@ if it has enough energy attached.
         print_action(f"Using {chosen_attack.name}!")
 
         action = AttackAction(attack_index=0)
-        result = engine.execute_action(game, game.current_player_id, action)
+        result = await engine.execute_action(game, game.current_player_id, action)
 
         if result.success:
             print_result(f"Attack successful!")
@@ -1020,7 +1022,7 @@ until someone reaches 4 points (or another win condition is met).
 
 if __name__ == "__main__":
     try:
-        run_walkthrough()
+        asyncio.run(run_walkthrough())
     except KeyboardInterrupt:
         print("\n\nWalkthrough interrupted. Goodbye!")
     except Exception as e: