feat(battle-engine): M1 auto-copy closure (782 battle-logic files)

Compile-driven bulk-copy loop (tools/engine-port/m1_copy_loop.py) pulled the precise reference closure of the battle-core roots, stopping at the classify god-object/View-VFX-UI boundary. 782 files; no re-explosion (M0 had estimated ~order 1000). Residual frontier = 52 shim-classified + 80 external (Unity/BCL) types to author next.

SVSim.BattleEngine/Engine/Wizard/EnemyAIFusion.cs

@@ -0,0 +1,34 @@
+namespace Wizard;
+
+public class EnemyAIFusion
+{
+	private EnemyAI _ai;
+
+	private AIFusionSituationInfo _fusionSituation;
+
+	public EnemyAIFusion(EnemyAI ai)
+	{
+		_ai = ai;
+		_fusionSituation = null;
+	}
+
+	public void InitOnIterationStart()
+	{
+		_fusionSituation = null;
+	}
+
+	public bool FusionAI()
+	{
+		if (_fusionSituation == null)
+		{
+			return false;
+		}
+		_ai.OprTargetSelect(_fusionSituation.Actor, _fusionSituation.SelectedTargets, AIOperationType.FUSION);
+		return true;
+	}
+
+	public void SetFusionSituation(AIFusionSituationInfo situation)
+	{
+		_fusionSituation = situation;
+	}
+}