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/AIVirtualFieldRollBackStackProcessor.cs

@@ -0,0 +1,40 @@
+using System.Collections.Generic;
+
+namespace Wizard;
+
+public class AIVirtualFieldRollBackStackProcessor : AIVirtualFieldRollBackBasicProcessor
+{
+	private Stack<AIVirtualFieldRollBackRecord> _recordStack;
+
+	public bool HasRecord => _recordStack.Count > 0;
+
+	public AIVirtualFieldRollBackStackProcessor(AIVirtualField targetField)
+		: base(targetField)
+	{
+		_recordStack = new Stack<AIVirtualFieldRollBackRecord>();
+	}
+
+	public void RegisterRecord()
+	{
+		_recordStack.Push(new AIVirtualFieldRollBackRecord(_field));
+	}
+
+	public override void ResetVirtualFieldToStart()
+	{
+		base.ResetVirtualFieldToStart();
+		_recordStack.Clear();
+	}
+
+	public void RollBackFieldWithIteration(int iteration = 1)
+	{
+		for (int i = 0; i < iteration; i++)
+		{
+			if (!HasRecord)
+			{
+				break;
+			}
+			AIVirtualFieldRollBackRecord record = _recordStack.Pop();
+			RollBackFromOneRecord(record);
+		}
+	}
+}