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/LitJson/JsonMockWrapper.cs

@@ -0,0 +1,210 @@
+using System;
+using System.Collections;
+
+namespace LitJson;
+
+public class JsonMockWrapper : IJsonWrapper, IList, ICollection, IEnumerable, IOrderedDictionary, IDictionary
+{
+	public bool IsArray => false;
+
+	public bool IsBoolean => false;
+
+	public bool IsDouble => false;
+
+	public bool IsInt => false;
+
+	public bool IsLong => false;
+
+	public bool IsObject => false;
+
+	public bool IsString => false;
+
+	bool IList.IsFixedSize => true;
+
+	bool IList.IsReadOnly => true;
+
+	object IList.this[int index]
+	{
+		get
+		{
+			return null;
+		}
+		set
+		{
+		}
+	}
+
+	int ICollection.Count => 0;
+
+	bool ICollection.IsSynchronized => false;
+
+	object ICollection.SyncRoot => null;
+
+	bool IDictionary.IsFixedSize => true;
+
+	bool IDictionary.IsReadOnly => true;
+
+	ICollection IDictionary.Keys => null;
+
+	ICollection IDictionary.Values => null;
+
+	object IDictionary.this[object key]
+	{
+		get
+		{
+			return null;
+		}
+		set
+		{
+		}
+	}
+
+	object IOrderedDictionary.this[int idx]
+	{
+		get
+		{
+			return null;
+		}
+		set
+		{
+		}
+	}
+
+	public bool GetBoolean()
+	{
+		return false;
+	}
+
+	public double GetDouble()
+	{
+		return 0.0;
+	}
+
+	public int GetInt()
+	{
+		return 0;
+	}
+
+	public JsonType GetJsonType()
+	{
+		return JsonType.None;
+	}
+
+	public long GetLong()
+	{
+		return 0L;
+	}
+
+	public string GetString()
+	{
+		return "";
+	}
+
+	public void SetBoolean(bool val)
+	{
+	}
+
+	public void SetDouble(double val)
+	{
+	}
+
+	public void SetInt(int val)
+	{
+	}
+
+	public void SetJsonType(JsonType type)
+	{
+	}
+
+	public void SetLong(long val)
+	{
+	}
+
+	public void SetString(string val)
+	{
+	}
+
+	public string ToJson()
+	{
+		return "";
+	}
+
+	public void ToJson(JsonWriter writer)
+	{
+	}
+
+	int IList.Add(object value)
+	{
+		return 0;
+	}
+
+	void IList.Clear()
+	{
+	}
+
+	bool IList.Contains(object value)
+	{
+		return false;
+	}
+
+	int IList.IndexOf(object value)
+	{
+		return -1;
+	}
+
+	void IList.Insert(int i, object v)
+	{
+	}
+
+	void IList.Remove(object value)
+	{
+	}
+
+	void IList.RemoveAt(int index)
+	{
+	}
+
+	void ICollection.CopyTo(Array array, int index)
+	{
+	}
+
+	IEnumerator IEnumerable.GetEnumerator()
+	{
+		return null;
+	}
+
+	void IDictionary.Add(object k, object v)
+	{
+	}
+
+	void IDictionary.Clear()
+	{
+	}
+
+	bool IDictionary.Contains(object key)
+	{
+		return false;
+	}
+
+	void IDictionary.Remove(object key)
+	{
+	}
+
+	IDictionaryEnumerator IDictionary.GetEnumerator()
+	{
+		return null;
+	}
+
+	IDictionaryEnumerator IOrderedDictionary.GetEnumerator()
+	{
+		return null;
+	}
+
+	void IOrderedDictionary.Insert(int i, object k, object v)
+	{
+	}
+
+	void IOrderedDictionary.RemoveAt(int i)
+	{
+	}
+}