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/SealedCardInfo.cs

@@ -0,0 +1,30 @@
+using LitJson;
+
+namespace Wizard;
+
+public class SealedCardInfo
+{
+	public int OriginalCardId { get; private set; }
+
+	public int SealedCardId { get; private set; }
+
+	public bool IsPhantom { get; private set; }
+
+	public int OwnNum { get; private set; }
+
+	public int DeckUsingNum { get; private set; }
+
+	public SealedCardInfo(JsonData rootData)
+		: this(rootData["card_id"].ToInt(), rootData["is_phantom"].ToInt() == 1, rootData["num"].ToInt(), rootData["deck_using_num"].ToInt())
+	{
+	}
+
+	public SealedCardInfo(int originalCardId, bool isPhantom, int ownNum, int deckUsingNum)
+	{
+		OriginalCardId = originalCardId;
+		IsPhantom = isPhantom;
+		OwnNum = ownNum;
+		DeckUsingNum = deckUsingNum;
+		SealedCardId = SealedData.ConvertToSealedCardId(originalCardId, isPhantom);
+	}
+}