feat(battle-engine): full Unity/VFX/god-object shims + expanded copy closure (2570 files)

Authored Unity primitive/object-model shim, VFX layer (control-flow-preserving, InstantVfx never invokes its action -- headless suppression), god-object stubs (GameMgr/EffectMgr/UIManager with faithfully-extracted nested enums), View/UI/Touch tree, LitJson+BetterList+Tuple copied, third-party stubs. Discovered Roslyn header-error masking: fixing class-header type errors unmasks body references, so the true copy closure is ~2570 files (was 782 under masking). Errors: masked-25720 -> 268; our shim files compile clean. Remaining: ~50 residual shim/external types, 24 NGUI UI-base overrides, static-type fixes, plus likely 1-2 more unmask waves.

SVSim.BattleEngine/Engine/Wizard/AIStack.cs

@@ -0,0 +1,43 @@
+using System.Collections.Generic;
+
+namespace Wizard;
+
+public class AIStack : AIScriptArgumentExpressions
+{
+	private AIPolishConvertedExpression _defaultStackValue;
+
+	private const int STACK_VALUE_ARG_INDEX = 0;
+
+	public AIStack(string text)
+		: base(text)
+	{
+	}
+
+	protected override void InitExpressions(string text)
+	{
+		base.InitExpressions(text);
+		if (_exprList == null || _exprList.Count <= 0)
+		{
+			AIConsoleUtility.LogError("AIStack error!! exprList is null or Count == 0");
+		}
+		else
+		{
+			_defaultStackValue = _exprList[0];
+		}
+	}
+
+	public override void Execute(AIVirtualCard tagOwner, AIVirtualField field, List<int> playPtn, AISituationInfo situation = null)
+	{
+		int stackValue = GetStackValue(tagOwner, field, playPtn, situation);
+		AIWhiteRitualSimulationUtility.SimulateStack(tagOwner, field, situation, stackValue);
+	}
+
+	private int GetStackValue(AIVirtualCard tagOwner, AIVirtualField field, List<int> playPtn, AISituationInfo situation)
+	{
+		if (_defaultStackValue == null)
+		{
+			return 0;
+		}
+		return (int)_defaultStackValue.EvalArg(tagOwner, playPtn, field, situation);
+	}
+}