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/PracticePuzzleFinishData.cs

@@ -0,0 +1,26 @@
+using System.Collections.Generic;
+using LitJson;
+
+public class PracticePuzzleFinishData
+{
+	public JsonData _responseData;
+
+	public int get_class_chara_experience;
+
+	public int class_chara_experience;
+
+	public int class_chara_level;
+
+	public List<UserMission> achieved_mission_list => AchievedInfo._missions;
+
+	public List<UserAchievement> achieved_achievement_list => AchievedInfo._achievements;
+
+	public List<ReceivedReward> Rewards => AchievedInfo._rewards;
+
+	public AchievedInfo AchievedInfo { get; private set; }
+
+	public PracticePuzzleFinishData()
+	{
+		AchievedInfo = new AchievedInfo();
+	}
+}