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/SpotCardExchangeInfo.cs

@@ -0,0 +1,50 @@
+using LitJson;
+
+namespace Wizard;
+
+public class SpotCardExchangeInfo
+{
+	public enum ExchangeStatus
+	{
+		EnableExchange,
+		AlreadyExchange,
+		LimitOver
+	}
+
+	public int CardId { get; private set; }
+
+	public CardBasePrm.ClanType Class { get; private set; }
+
+	public int PackId { get; private set; }
+
+	public ExchangeStatus SpotCardExchangeStatus { get; private set; }
+
+	public int ExchangePoint { get; private set; }
+
+	public int ExchangeNum { get; private set; }
+
+	public bool IsPrereleaseCard { get; private set; }
+
+	public SpotCardExchangeInfo(JsonData data, int packId)
+	{
+		CardId = data["card_id"].ToInt();
+		Class = (CardBasePrm.ClanType)data["class"].ToInt();
+		PackId = packId;
+		SpotCardExchangeStatus = (ExchangeStatus)data["exchange_status"].ToInt();
+		ExchangePoint = data["exchange_point"].ToInt();
+		IsPrereleaseCard = data["is_pre_release"].ToBoolean();
+		ExchangeNum = 1;
+	}
+
+	public string GetExchangeCardText()
+	{
+		string userGoodsName = UserGoods.getUserGoodsName(UserGoods.Type.SpotCard, CardId);
+		return Data.SystemText.Get("Shop_0150", userGoodsName, ExchangeNum.ToString());
+	}
+
+	public string GetExchangeCardTextSmall()
+	{
+		string text = CardMaster.GetInstance(CardMaster.CardMasterId.Default).GetCardParameterFromId(CardId).CardName + " " + Data.SystemText.Get("Shop_0248");
+		return Data.SystemText.Get("Shop_0150", text, ExchangeNum.ToString());
+	}
+}