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/AIEvoChangeCost.cs

@@ -0,0 +1,86 @@
+using System.Collections.Generic;
+
+namespace Wizard;
+
+public class AIEvoChangeCost : AIEvoTagArgument
+{
+	private readonly AIScriptTokenArgType[] _legalCostTypeArgs = new AIScriptTokenArgType[2]
+	{
+		AIScriptTokenArgType.ADD,
+		AIScriptTokenArgType.SET
+	};
+
+	private AIPolishConvertedExpression _costValue;
+
+	private const int COST_VALUE_ARG_OFFSET = 1;
+
+	private const int COST_TYPE_ARG_OFFSET = 2;
+
+	public AIScriptTokenArgType CostVariableType { get; private set; }
+
+	public override TargetSelectType SimulationTargetSelectType => TargetSelectType.NormalRuleBase;
+
+	protected override int SELECT_TYPE_OFFSET => 3;
+
+	public AIEvoChangeCost(string text)
+		: base(text)
+	{
+	}
+
+	protected override void InitExpressions(string text)
+	{
+		base.InitExpressions(text);
+		_costValue = _exprList[_exprList.Count - 1];
+		CostVariableType = AIPlayTagInitializingUtility.CreateSingleArgType(_exprList[_exprList.Count - 2], _legalCostTypeArgs);
+	}
+
+	public override void Execute(AIVirtualCard tagOwner, AIVirtualField field, List<int> playPtn, AISituationInfo situation = null)
+	{
+		List<AIVirtualCard> targetsFromField = GetTargetsFromField(tagOwner, field, playPtn, situation);
+		if (targetsFromField != null && targetsFromField.Count > 0)
+		{
+			int costValue = GetCostValue(tagOwner, field, playPtn, situation);
+			AIChangeCostSimulationUtility.ExecuteCostChange(CostVariableType, base.SelectType, costValue, tagOwner, targetsFromField, situation, field);
+		}
+	}
+
+	public override void RegisterRuleBaseTargets(List<AIVirtualCard> candidates, AIVirtualCard actor, AIVirtualField field, AIVirtualTargetSelectAction situation, ref List<AIVirtualCard> targetList)
+	{
+		base.RegisterRuleBaseTargets(candidates, actor, field, situation, ref targetList);
+		AIVirtualCard aIVirtualCard = AIChangeCostSimulationUtility.SelectTargetForChangeCost(actor, candidates, AISelectTargetPattern.Best);
+		if (aIVirtualCard != null)
+		{
+			targetList = AIParamQuery.AddElementToList(aIVirtualCard, targetList);
+		}
+	}
+
+	public override bool IsTargetGoingToDie(AIVirtualCard owner, AIVirtualCard candidate, AISituationInfo situation)
+	{
+		return false;
+	}
+
+	protected override void CreateLegalSelectTypes()
+	{
+		base.LegalSelectTypes = new AIScriptTokenArgType[3]
+		{
+			AIScriptTokenArgType.ALL_SELECT,
+			AIScriptTokenArgType.TARGET_SELECT,
+			AIScriptTokenArgType.RANDOM_SELECT
+		};
+	}
+
+	protected override List<AIVirtualCard> GetCandidateRange(AIVirtualField field)
+	{
+		return field.GetSimulationHandCards();
+	}
+
+	private int GetCostValue(AIVirtualCard tagOwner, AIVirtualField field, List<int> playPtn, AISituationInfo situation)
+	{
+		if (_costValue == null)
+		{
+			AIConsoleUtility.LogError("AIEvoChangeCost.GetCostValue() error!! _costValue is null");
+			return 0;
+		}
+		return (int)_costValue.EvalArg(tagOwner, playPtn, field, situation);
+	}
+}