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/Wizard.Battle.Operation/OperationSimulator.cs

@@ -6,29 +6,12 @@ namespace Wizard.Battle.Operation;
 
 public static class OperationSimulator
 {
-	public static BattlePlayerPair Attack(BattlePlayerPair sourcePair, IBattleCardUniqueID attackCardId, IBattleCardUniqueID targetCardId, bool isPrediction = false, Action<BattlePlayerPair> OnVirtualPairCloned = null)
-	{
-		BattleManagerBase.IsForecast = true;
-		bool isRecovery = BattleManagerBase.GetIns().IsRecovery;
-		BattleManagerBase.GetIns().IsRecovery = true;
-		BattlePlayerPair battlePlayerPair = sourcePair.VirtualClone(CloneActualFlags.All);
-		OnVirtualPairCloned?.Call(battlePlayerPair);
-		if (isPrediction)
-		{
-			Prediction.ChangeFilters(battlePlayerPair);
-		}
-		Prediction.CloneSkillsPreprocessAndBuffInfo(sourcePair, battlePlayerPair);
-		new ActionProcessor(battlePlayerPair).Attack(attackCardId, targetCardId);
-		BattleManagerBase.GetIns().IsRecovery = isRecovery;
-		BattleManagerBase.IsForecast = false;
-		return battlePlayerPair;
-	}
 
 	public static BattlePlayerPair Play(BattlePlayerPair sourcePair, IBattleCardUniqueID playCardId, List<BattleCardBase> skillTargets, Action<BattlePlayerPair> OnVirtualPairCloned = null, Action<BattleCardBase> playCardSkillEvent = null)
 	{
-		BattleManagerBase.IsForecast = true;
-		bool isRecovery = BattleManagerBase.GetIns().IsRecovery;
-		BattleManagerBase.GetIns().IsRecovery = true;
+		sourcePair.Self.BattleMgr.InstanceIsForecast = true;
+		bool isRecovery = sourcePair.Self.BattleMgr.IsRecovery;
+		sourcePair.Self.BattleMgr.IsRecovery = true;
 		BattlePlayerPair battlePlayerPair = sourcePair.VirtualClone(CloneActualFlags.All);
 		OnVirtualPairCloned?.Call(battlePlayerPair);
 		Prediction.CloneSkillsPreprocessAndBuffInfo(sourcePair, battlePlayerPair);
@@ -39,8 +22,8 @@ public static class OperationSimulator
 		battlePlayerPair.Self.SetupActionProcessorEvent(actionProcessor);
 		battlePlayerPair.Opponent.SetupActionProcessorEvent(actionProcessor);
 		actionProcessor.PlayCard(battleCardBase, first);
-		BattleManagerBase.GetIns().IsRecovery = isRecovery;
-		BattleManagerBase.IsForecast = false;
+		sourcePair.Self.BattleMgr.IsRecovery = isRecovery;
+		sourcePair.Self.BattleMgr.InstanceIsForecast = false;
 		return battlePlayerPair;
 	}
 
@@ -74,17 +57,17 @@ public static class OperationSimulator
 
 	public static BattlePlayerPair Evolve(BattlePlayerPair sourcePair, IBattleCardUniqueID evolutionCardId, List<BattleCardBase> skillTargets, Action<BattlePlayerPair> OnVirtualPairCloned = null)
 	{
-		BattleManagerBase.IsForecast = true;
-		bool isRecovery = BattleManagerBase.GetIns().IsRecovery;
-		BattleManagerBase.GetIns().IsRecovery = true;
+		sourcePair.Self.BattleMgr.InstanceIsForecast = true;
+		bool isRecovery = sourcePair.Self.BattleMgr.IsRecovery;
+		sourcePair.Self.BattleMgr.IsRecovery = true;
 		BattlePlayerPair battlePlayerPair = sourcePair.VirtualClone(CloneActualFlags.All);
 		OnVirtualPairCloned?.Call(battlePlayerPair);
 		Prediction.CloneSkillsPreprocessAndBuffInfo(sourcePair, battlePlayerPair);
 		BattleCardBase[] first = Evolve_GetTargetsAndChoice(battlePlayerPair, skillTargets).first;
 		BattleCardBase card = battlePlayerPair.Self.ClassAndInPlayCardList.FindFromCardId(evolutionCardId);
 		new ActionProcessor(battlePlayerPair).Evolution(card, first);
-		BattleManagerBase.GetIns().IsRecovery = isRecovery;
-		BattleManagerBase.IsForecast = false;
+		sourcePair.Self.BattleMgr.IsRecovery = isRecovery;
+		sourcePair.Self.BattleMgr.InstanceIsForecast = false;
 		return battlePlayerPair;
 	}
 
@@ -140,24 +123,11 @@ public static class OperationSimulator
 		return null;
 	}
 
-	public static BattlePlayerPair TurnEnd(BattlePlayerPair sourcePair)
-	{
-		BattleManagerBase.IsForecast = true;
-		bool isRecovery = BattleManagerBase.GetIns().IsRecovery;
-		BattleManagerBase.GetIns().IsRecovery = true;
-		BattlePlayerPair battlePlayerPair = sourcePair.VirtualClone(CloneActualFlags.All);
-		Prediction.CloneSkillsPreprocessAndBuffInfo(sourcePair, battlePlayerPair);
-		battlePlayerPair.Self.GetTurnEndSkillProcess().Process(battlePlayerPair);
-		BattleManagerBase.GetIns().IsRecovery = isRecovery;
-		BattleManagerBase.IsForecast = false;
-		return battlePlayerPair;
-	}
-
 	public static BattlePlayerPair TurnStart(BattlePlayerPair sourcePair)
 	{
-		BattleManagerBase.IsForecast = true;
-		bool isRecovery = BattleManagerBase.GetIns().IsRecovery;
-		BattleManagerBase.GetIns().IsRecovery = true;
+		sourcePair.Self.BattleMgr.InstanceIsForecast = true;
+		bool isRecovery = sourcePair.Self.BattleMgr.IsRecovery;
+		sourcePair.Self.BattleMgr.IsRecovery = true;
 		BattlePlayerPair battlePlayerPair = sourcePair.VirtualClone(CloneActualFlags.All);
 		Prediction.CloneSkillsPreprocessAndBuffInfo(sourcePair, battlePlayerPair);
 		battlePlayerPair.Self.IsSelfTurn = true;
@@ -172,8 +142,8 @@ public static class OperationSimulator
 			inPlayCard2.OpponentTurnStart(skillProcessor);
 		}
 		skillProcessor.Process(battlePlayerPair);
-		BattleManagerBase.GetIns().IsRecovery = isRecovery;
-		BattleManagerBase.IsForecast = false;
+		sourcePair.Self.BattleMgr.IsRecovery = isRecovery;
+		sourcePair.Self.BattleMgr.InstanceIsForecast = false;
 		return battlePlayerPair;
 	}
 }

SVSim.BattleEngine/Engine/Wizard.Battle.Operation/SimulateSkillCreator.cs

@@ -1,5 +1,9 @@
 using Wizard.Battle.Card;
 using Wizard.Battle.Resource;
+// TODO(engine-cleanup-pass2): 2 of 3 methods unrun in baseline
+//   Type: Wizard.Battle.Operation.SimulateSkillCreator
+//   See data_dumps/reports/engine-cleanup/live-methods.baseline.txt
+
 
 namespace Wizard.Battle.Operation;
 

SVSim.BattleEngine/Engine/Wizard.Battle.Operation/SimulationSelection.cs

@@ -2,7 +2,6 @@ namespace Wizard.Battle.Operation;
 
 public enum SimulationSelection
 {
-	Random,
 	All,
 	None
 }

SVSim.BattleEngine/Engine/Wizard.Battle.Operation/SkillOperationCommandBase.cs

@@ -58,7 +58,7 @@ public abstract class SkillOperationCommandBase : IOperationCommand
 
 	protected VfxWith<List<BattleCardBase>> GetSkillSelectedCardsWithVfx(BattleCardBase card, bool isEvolution, Func<bool, VfxBase> func = null)
 	{
-		BattleManagerBase ins = BattleManagerBase.GetIns();
+		BattleManagerBase ins = card.GetBuildInfo.BattleMgr; // Pre-Phase-5b: mgr via card's build info
 		List<SkillBase> list = card.GetSelectTypeSkill(isEvolution).ToList();
 		SkillCollectionBase source = (isEvolution ? card.EvolutionSkills : card.NormalSkills);
 		VfxBase vfx = NullVfx.GetInstance();