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/NullBattleCard.cs

@@ -0,0 +1,94 @@
+using System.Collections.Generic;
+using Wizard.Battle;
+using Wizard.Battle.View;
+using Wizard.Battle.View.Vfx;
+
+public class NullBattleCard : BattleCardBase
+{
+	private static BuildInfo _dummyBuildInfo;
+
+	private static NullSkillApplyInformation _dummySkillApplyInfo;
+
+	private static BattleCardView.BuildInfo _dummyViewBuildInfo;
+
+	private static NullBattleCardView _dummyView;
+
+	public override int Index => -1;
+
+	public override List<CardBasePrm.TribeType> Tribe => CardBasePrm.DefaultType;
+
+	public override bool IsInHand => false;
+
+	public override bool IsInplay => false;
+
+	public override bool IsInDeck => false;
+
+	public override bool IsInCemetery => true;
+
+	public static void ReleaseSharedDummy()
+	{
+		_dummyBuildInfo = null;
+		_dummySkillApplyInfo = null;
+		_dummyViewBuildInfo = null;
+		_dummyView = null;
+	}
+
+	public static NullBattleCard Create()
+	{
+		if (_dummyBuildInfo == null)
+		{
+			_dummyBuildInfo = new BuildInfo(null, -1, null, null, null, null, null, _isPlayer: true, 0, NullInnerOptionsBuilder.GetInstance().CreateCardOptions(), null, null);
+		}
+		NullBattleCard nullBattleCard = new NullBattleCard(_dummyBuildInfo);
+		nullBattleCard.Setup(createNullView: true);
+		return nullBattleCard;
+	}
+
+	protected override void InitSkillCollection()
+	{
+		_normalSkillCollection = null;
+		_evolveSkillCollection = null;
+	}
+
+	private NullBattleCard(BuildInfo buildInfo)
+		: base(buildInfo)
+	{
+	}
+
+	protected override ICardVfxCreator CreateVfxCreator(bool isPlayer, IBattleCardView battleCardView, bool isNullView)
+	{
+		return NullCardVfxCreator.GetInstance();
+	}
+
+	public override BattleCardBase VirtualClone(BattlePlayerBase selfBattlePlayer, BattlePlayerBase opponentBattlePlayer)
+	{
+		return this;
+	}
+
+	protected override BattleCardView.BuildInfo CreateViewBuildInfo(BuildInfo baseBuildInfo)
+	{
+		if (_dummyViewBuildInfo == null)
+		{
+			_dummyViewBuildInfo = new BattleCardView.BuildInfo(this, null, null, null, null, null, null, null, null, null, null, null, null, null);
+		}
+		return _dummyViewBuildInfo;
+	}
+
+	protected override IBattleCardView CreateView(BattleCardView.BuildInfo buildInfo, bool isNullView)
+	{
+		if (_dummyView == null)
+		{
+			_dummyView = new NullBattleCardView(buildInfo);
+		}
+		return _dummyView;
+	}
+
+	protected override ISkillApplyInformation CreateSkillApplyInformation(BattleCardBase card, ICardVfxCreator vfxCreator)
+	{
+		if (_dummySkillApplyInfo == null)
+		{
+			_dummySkillApplyInfo = new NullSkillApplyInformation();
+		}
+		return _dummySkillApplyInfo;
+	}
+}