engine cleanup passes 4-7 + multi-instancing ambient rip

Squashes 146 commits from battle-engine-extraction. Net: 2,045 files changed,
+11,896 / -158,687 lines. Ships engine passes 4-7 (dead-code cull, view-layer
stub, receive-path shrink) plus the Phase-5 AsyncLocal ambient deletion that
turns concurrent battles into a type-system property rather than a scope
contract.

## What landed

**Passes 4-7 (chunks 1-34):** Extended the Phase-4 const-false collapse into a
cascading cull across the skill graph, view layer, and receive-path periphery.
Six mode flags (IsWatchBattle/IsReplayBattle/IsAdmin/IsAdminWatch/IsPuzzleQuest/
IsAINetwork) became `const false`, every guarded block deleted. Field*.cs
subclass ctors + BackGroundBase + ObjectChecker culled to no-ops. Mulligan
family reworked to take a mgr param through IMulliganMgr.InitMulligan.
Emotion/Recovery/Resource clusters null-stubbed. Prediction/OperationSimulator/
skill filters converted from static ambient reads to per-mgr reads via
SkillPrm.ownerCard.SelfBattlePlayer.BattleMgr / ins.BattleMgr / this.BattleMgr.

**Phase-5 ambient rip (chunks 35-47):** Deleted BattleAmbient / BattleAmbient-
Context / TestBattleScope in full. Every per-battle mutable slot now lives on
the mgr instance itself:
  mgr.InstanceIsForecast / InstanceIsRandomDraw / InstanceRecoveryInfo /
  InstanceViewerId / InstanceNetworkAgent / GameMgr
BattleManagerBase.GetIns() returns null unconditionally; the residual static
flags + 3 façades (Certification.ViewerId, Data.BattleRecoveryInfo,
ToolboxGame.RealTimeNetworkAgent) are null-tolerant defaults kept for the
handful of engine-internal readers that still reference their types. Zero
BattleAmbient references anywhere in engine + node + tests.

Added pre-seeded GameMgr ctor overload threaded through the mgr chain
(BattleManagerBase → SingleBattleMgr / NetworkBattleManagerBase → NetworkStandard-
BattleMgr → HeadlessBattleMgr / HeadlessNetworkBattleMgr). Fixtures build a
GameMgr, seed it via HeadlessEngineEnv.SeedCharaIds/SeedNetUser, and pass it
to the mgr's ctor — no ambient reach.

Node side (SVSim.BattleNode/SessionBattleEngine): _ctx replaced with a plain
GameMgr field; 34 `using var _ambient = BattleAmbient.Enter(_ctx)` scope wraps
ripped from every accessor and mutator; EngineGlobalInit.WirePerSessionGameMgr
takes GameMgr as a param and runs from SessionBattleEngine.SetupInternal
BEFORE mgr construction.

Test side: TestBattleScope deleted; 18 fixture [SetUp]s migrated to
`HeadlessEngineEnv.EnsureProcessGlobals()`; MultiInstanceEngineTests rewritten
around per-mgr construction (GetIns() → null is the pinned invariant).

## Regression fixes

- **chunk-48** (MulliganCtrl): chunk-35's `= null` stubs on card lookups broke
  the live receive-driven Deal path (BattlePlayerBase.DrawCard NRE'd downstream
  of NetworkPlayerMulliganCtrl.StartMulliganVfx). Restored the three lookups
  via `_battlePlayer.BattleMgr.GetBattleCardIdx`. Engine tests were satisfied
  by the WireMulliganPhase seam; unit tests exposed the live-path gap.

## Ship state

- SVSim.BattleEngine.Tests: 56/56 pass, 2 skip
- SVSim.UnitTests: 1554/1554 pass (was 1523/31-fail before chunk 48)
- Solution build: 0 source warnings (40 pre-existing NU1902 MessagePack CVEs
  in SVSim.EmulatedEntrypoint, unrelated)
- Sequential PVP smoke: verified live (two back-to-back battles, no regression
  on cleanup/spinup)
- Concurrent PVP smoke: verified live

Adds tools/engine-port/ClosureAnalyzer/ — the Roslyn transitive-type-closure
analyzer needed to make future cascade cleanup safe (per feedback memory
"Engine cleanup needs closure tool" from the 2026-06-28 pass-3 failure).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

SVSim.BattleEngine/Engine/NetworkBattleGenericTool.cs

@@ -136,34 +136,6 @@ public class NetworkBattleGenericTool
 		return list;
 	}
 
-	public static bool IsAttachedSkill(SkillBase skill)
-	{
-		ISkillApplyInformation skillApplyInformation = skill.SkillPrm.ownerCard.SkillApplyInformation;
-		if (skillApplyInformation != null && skillApplyInformation.AttachedSkillsInfo != null && skillApplyInformation.AttachedSkillsInfo.AttachedSkills != null && skillApplyInformation.AttachedSkillsInfo.AttachedSkills.ToList().Count > 0)
-		{
-			foreach (SkillBase attachedSkill in skillApplyInformation.AttachedSkillsInfo.AttachedSkills)
-			{
-				if (attachedSkill == skill)
-				{
-					return true;
-				}
-			}
-		}
-		return false;
-	}
-
-	public static SkillBase SearchPublishedSkillCountToSkill(BattleCardBase card, int skillId)
-	{
-		foreach (SkillBase skill in card.Skills)
-		{
-			if (GetPublishSkillCount(skill) == skillId)
-			{
-				return skill;
-			}
-		}
-		return null;
-	}
-
 	public static int GetSkillIndex(SkillBase skill)
 	{
 		int num = 0;
@@ -373,7 +345,7 @@ public class NetworkBattleGenericTool
 
 	public static int GetSkillMovementNum(SkillBase skillBase)
 	{
-		if (GameMgr.GetIns().IsAINetwork)
+		if (skillBase.SkillPrm.ownerCard.SelfBattlePlayer.BattleMgr.GameMgr.IsAINetwork)
 		{
 			return -1;
 		}
@@ -383,7 +355,7 @@ public class NetworkBattleGenericTool
 	public static int GetPublishSkillCount(SkillBase skill)
 	{
 		int result = -1;
-		if (GameMgr.GetIns().IsAINetwork)
+		if (skill.SkillPrm.ownerCard.SelfBattlePlayer.BattleMgr.GameMgr.IsAINetwork)
 		{
 			return result;
 		}
@@ -393,7 +365,7 @@ public class NetworkBattleGenericTool
 			if (skill.PublishedActiveSkillCount == -1)
 			{
 				BattleCardBase skillCard = skill.SkillPrm.ownerCard;
-				SkillBase skillBase = BattleManagerBase.GetIns().PublishedSkillList.FindAll((SkillBase x) => x.GetType() == skill.GetType() && x.SkillTimingText == skill.SkillTimingText).FindLast((SkillBase x) => x.SkillPrm.ownerCard.Index == skillCard.Index && x.SkillPrm.ownerCard.IsPlayer == skillCard.IsPlayer);
+				SkillBase skillBase = skill.SkillPrm.ownerCard.SelfBattlePlayer.BattleMgr.PublishedSkillList.FindAll((SkillBase x) => x.GetType() == skill.GetType() && x.SkillTimingText == skill.SkillTimingText).FindLast((SkillBase x) => x.SkillPrm.ownerCard.Index == skillCard.Index && x.SkillPrm.ownerCard.IsPlayer == skillCard.IsPlayer);
 				if (skillBase != null)
 				{
 					result = skillBase.PublishedActiveSkillCount;
@@ -495,15 +467,6 @@ public class NetworkBattleGenericTool
 		return true;
 	}
 
-	private static bool IsTargetDeckOrHand(ISkillTargetFilter applyingTargetFilter)
-	{
-		if (!(applyingTargetFilter is SkillTargetDeckFilter) && !(applyingTargetFilter is SkillTargetHandFilter))
-		{
-			return applyingTargetFilter is SkillTargetHandOtherSelfFilter;
-		}
-		return true;
-	}
-
 	private static bool IsOnlyAllCardFilter(List<ISkillCardFilter> applyCardFilterList)
 	{
 		for (int i = 0; i < applyCardFilterList.Count; i++)
@@ -518,7 +481,7 @@ public class NetworkBattleGenericTool
 
 	public static void SettingRegisterTargetGroupAndInsert()
 	{
-		List<RegisterActionBase> registerDataList = (BattleManagerBase.GetIns() as NetworkBattleManagerBase).RegisterActionManager.RegisterDataList;
+		List<RegisterActionBase> registerDataList = new List<RegisterActionBase>(); // Pre-Phase-5b: SettingRegisterTargetGroupAndInsert is unreachable headless
 		foreach (RegisterLotCardBase item in registerDataList.FindAll((RegisterActionBase x) => x is RegisterLotCardBase).ConvertAll((RegisterActionBase x) => x as RegisterLotCardBase))
 		{
 			RegisterActionBase registerActionBase = null;
@@ -582,7 +545,7 @@ public class NetworkBattleGenericTool
 
 	public static RegisterLotCardBase MakeRegisterLotAndRandomAdvance(SkillBase skillBase, IEnumerable<BattleCardBase> cards, SkillConditionCheckerOption checkerOption)
 	{
-		NetworkBattleManagerBase networkBattleManagerBase = BattleManagerBase.GetIns() as NetworkBattleManagerBase;
+		NetworkBattleManagerBase networkBattleManagerBase = skillBase.SkillPrm.ownerCard.SelfBattlePlayer.BattleMgr as NetworkBattleManagerBase;
 		List<CardDataModel> unapprovedList = networkBattleManagerBase.networkBattleData.GetReceiveData().unapprovedList;
 		NetworkExecutionInfoCreator networkExec = skillBase._executionInfoCreator as NetworkExecutionInfoCreator;
 		int num = 0;
@@ -650,7 +613,7 @@ public class NetworkBattleGenericTool
 		{
 			return NullVfx.GetInstance();
 		}
-		NetworkBattleManagerBase networkBattleManagerBase = BattleManagerBase.GetIns() as NetworkBattleManagerBase;
+		NetworkBattleManagerBase networkBattleManagerBase = skillBase.SkillPrm.ownerCard.SelfBattlePlayer.BattleMgr as NetworkBattleManagerBase;
 		int skillMovementNum = GetSkillMovementNum(skillBase);
 		foreach (BattleCardBase card in cards)
 		{
@@ -761,92 +724,4 @@ public class NetworkBattleGenericTool
 		}
 		return false;
 	}
-
-	public static string FindDictionaryURI(Dictionary<string, object> data)
-	{
-		if (data.ContainsKey("uri"))
-		{
-			return data["uri"].ToString();
-		}
-		return "";
-	}
-
-	public static void CreateLoadAndPlayEffectVfxLastTurnLog()
-	{
-		CreateLoadAndPlayEffectVfxCheckLog(isLastTurn: true);
-	}
-
-	public static void CreateLoadAndPlayEffectVfxClientInfoLog()
-	{
-		CreateLoadAndPlayEffectVfxCheckLog(isLastTurn: false);
-	}
-
-	private static void CreateLoadAndPlayEffectVfxCheckLog(bool isLastTurn)
-	{
-		try
-		{
-			BattleManagerBase ins = BattleManagerBase.GetIns();
-			if (ins == null)
-			{
-				return;
-			}
-			foreach (LoadAndPlayEffectVfx item in ins.VfxMgr.GetSequentialVfxQueues().ToList().FindAll((VfxBase x) => x is LoadAndPlayEffectVfx)
-				.ConvertAll((VfxBase x) => x as LoadAndPlayEffectVfx))
-			{
-				if (item.LoadingVfx != null && item.LoadingVfx is SkillBase.WaitEffectLoadVfx)
-				{
-					SkillBase.WaitEffectLoadVfx waitEffectLoadVfx = item.LoadingVfx as SkillBase.WaitEffectLoadVfx;
-					if (waitEffectLoadVfx.LoadVfx != null)
-					{
-						string log = "LoadVfxIsEnd=" + waitEffectLoadVfx.LoadVfx.IsEnd;
-						if (isLastTurn)
-						{
-							LocalLog.AccumulateLastTraceLog(log);
-						}
-						else
-						{
-							LocalLog.AccumulateTraceLog(log);
-						}
-					}
-				}
-				string log2 = "loadEffect.LoadFileName=" + item.LoadFileName;
-				if (isLastTurn)
-				{
-					LocalLog.AccumulateLastTraceLog(log2);
-				}
-				else
-				{
-					LocalLog.AccumulateTraceLog(log2);
-				}
-				if (item.WaitLoadEffectAndSetSeVfxData != null)
-				{
-					string log3 = "WaitLoadEffectAndSetSeVfxData Step" + item.WaitLoadEffectAndSetSeVfxData.NowStep;
-					if (isLastTurn)
-					{
-						LocalLog.AccumulateLastTraceLog(log3);
-					}
-					else
-					{
-						LocalLog.AccumulateTraceLog(log3);
-					}
-				}
-				if (item.PlayEffectAndSeVfxData != null)
-				{
-					string log4 = "PlayEffectAndSeVfxData Step" + item.PlayEffectAndSeVfxData.NowStep;
-					if (isLastTurn)
-					{
-						LocalLog.AccumulateLastTraceLog(log4);
-					}
-					else
-					{
-						LocalLog.AccumulateTraceLog(log4);
-					}
-				}
-			}
-		}
-		catch
-		{
-			LocalLog.AccumulateLastTraceLog("VfxCheckLog Error");
-		}
-	}
 }