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/PlayedTogetherHistory.cs

@@ -0,0 +1,52 @@
+using System;
+using LitJson;
+
+namespace Wizard;
+
+public class PlayedTogetherHistory : HeaderData
+{
+	public const int FRIEND_STATUS_NO_ACTION = 0;
+
+	public const int FRIEND_STATUS_IS_FRIEND = 1;
+
+	public const int FRIEND_STATUS_IS_SEND = 2;
+
+	public const int FRIEND_STATUS_IS_RECEIVED = 3;
+
+	public int ViewerId;
+
+	public string Name;
+
+	public string CountryCode;
+
+	public int Rank;
+
+	public long EmblemId;
+
+	public int DegreeId;
+
+	public DateTime LastPlayTime;
+
+	public int FriendStatus;
+
+	public DateTime PlayedTime;
+
+	public int ApplyId;
+
+	public BattleParameter BattleParameter;
+
+	public PlayedTogetherHistory(JsonData data)
+	{
+		ViewerId = data["viewer_id"].ToInt();
+		Name = data["name"].ToString();
+		CountryCode = data["country_code"].ToString();
+		Rank = data["rank"].ToInt();
+		EmblemId = data["emblem_id"].ToLong();
+		DegreeId = data["degree_id"].ToInt();
+		LastPlayTime = DateTime.Parse(data["last_play_time"].ToString());
+		FriendStatus = data["friend_status"].ToInt();
+		PlayedTime = DateTime.Parse(data["played_time"].ToString());
+		ApplyId = data["friend_apply_id"].ToInt();
+		BattleParameter = BattleParameter.JsonToBattleParameter(data);
+	}
+}