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/FormatBehaviorManager.cs

@@ -0,0 +1,64 @@
+using System.Collections.Generic;
+
+namespace Wizard;
+
+public static class FormatBehaviorManager
+{
+	private static Dictionary<Format, IFormatBehavior> _behaviorDic = new Dictionary<Format, IFormatBehavior>();
+
+	public static IFormatBehavior Create(Format format, ConventionDeckList conventionDeckList)
+	{
+		if (conventionDeckList != null)
+		{
+			switch (format)
+			{
+			case Format.Rotation:
+				return new ConventionRotationFormatBehavior(conventionDeckList);
+			case Format.Unlimited:
+				return new ConventionUnlimitedFormatBehavior(conventionDeckList);
+			case Format.Crossover:
+				return new ConventionCrossoverFormatBehavior(conventionDeckList);
+			case Format.MyRotation:
+				return new ConventionMyRotationFormatBehavior(conventionDeckList);
+			}
+		}
+		return GetDefaultBehaviour(format);
+	}
+
+	public static IFormatBehavior GetDefaultBehaviour(Format format)
+	{
+		if (_behaviorDic.TryGetValue(format, out var value))
+		{
+			return value;
+		}
+		value = CreateDefaultBehaviour(format);
+		_behaviorDic.Add(format, value);
+		return value;
+	}
+
+	private static IFormatBehavior CreateDefaultBehaviour(Format format)
+	{
+		return format switch
+		{
+			Format.Rotation => new RotationFormatBehavior(), 
+			Format.Unlimited => new UnlimitedFormatBehavior(), 
+			Format.Sealed => new SealedFormatBehavior(), 
+			Format.PreRotation => new PreRotationFormatBehavior(), 
+			Format.Hof => new HofFormatBehavior(), 
+			Format.Crossover => new CrossoverFormatBehavior(), 
+			Format.MyRotation => new MyRotationFormatBehavior(), 
+			Format.Avatar => new AvatarFormatBehavior(), 
+			_ => new NoneFormatBehavior(), 
+		};
+	}
+
+	public static string GetFormatName(Format format)
+	{
+		return format switch
+		{
+			Format.Hof => Data.SystemText.Get("Colosseum_0108"), 
+			Format.Windfall => Data.SystemText.Get("Colosseum_0115"), 
+			_ => GetDefaultBehaviour(format).Name, 
+		};
+	}
+}