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/FreeCardPackCampaignFinishTask.cs

@@ -0,0 +1,41 @@
+namespace Wizard;
+
+public class FreeCardPackCampaignFinishTask : BaseTask
+{
+	public class FreeCardPackCampaignFinishTaskParam : BaseParam
+	{
+		public int campaign_id { get; set; }
+
+		public int prize { get; set; }
+
+		public int opened_box { get; set; }
+	}
+
+	public FreeCardPackCampaignFinishTask()
+	{
+		base.type = ApiType.Type.FreeCardPackBoxFinish;
+	}
+
+	public void SetParameter(int campaignId, int prizeId, int openedBox)
+	{
+		FreeCardPackCampaignFinishTaskParam freeCardPackCampaignFinishTaskParam = new FreeCardPackCampaignFinishTaskParam();
+		freeCardPackCampaignFinishTaskParam.campaign_id = campaignId;
+		freeCardPackCampaignFinishTaskParam.prize = prizeId;
+		freeCardPackCampaignFinishTaskParam.opened_box = openedBox;
+		base.Params = freeCardPackCampaignFinishTaskParam;
+	}
+
+	protected override int Parse()
+	{
+		int num = base.Parse();
+		if (num != 1)
+		{
+			return num;
+		}
+		if (base.ResponseData["data"].TryGetValue("reward_list", out var value))
+		{
+			PlayerStaticData.UpdateHaveUserGoodsNumByJsonData(value);
+		}
+		return num;
+	}
+}