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/Effect.cs

@@ -1,4 +1,3 @@
-using CriWare;
 using UnityEngine;
 
 public class Effect : MonoBehaviour
@@ -13,18 +12,8 @@ public class Effect : MonoBehaviour
 
 	private bool m_Use;
 
-	private GameObject m_ChaseObjIns;
-
-	private GameObject m_LookAtObject;
-
 	private bool _buff;
 
-	private CriAtomSource m_EffectSeSource;
-
-	private Camera _lookAtCamera;
-
-	private bool _isFollowScale;
-
 	public Effect()
 	{
 		m_Type = EffectMgr.EffectType.NONE;
@@ -34,272 +23,13 @@ public class Effect : MonoBehaviour
 		_buff = false;
 	}
 
-	public void Init(EffectMgr.EffectType type, bool isCommon = false, string SePath = "", bool isFollowScale = false)
-	{
-		m_Type = type;
-		if (!string.IsNullOrEmpty(SePath))
-		{
-			m_EffectSeSource = base.gameObject.GetComponent<CriAtomSource>();
-			m_EffectSeSource.use3dPositioning = true;
-			m_EffectSeSource.playOnStart = false;
-		}
-		m_GameObjIns = base.gameObject;
-		m_ParticleSystem = m_GameObjIns.GetComponent<ParticleSystem>();
-		m_ParticleSystem.GetComponent<Renderer>().sortingOrder = 4;
-		if (isCommon)
-		{
-			m_ParticleSystem.Stop();
-		}
-		_isFollowScale = isFollowScale;
-	}
-
-	public void Play(Vector3 Pos, Quaternion Rot)
-	{
-		m_Pos = Pos;
-		m_GameObjIns.transform.position = m_Pos;
-		m_GameObjIns.transform.rotation = Rot;
-		On();
-		m_GameObjIns.SetActive(value: true);
-		m_ParticleSystem.Play();
-		if (m_EffectSeSource != null)
-		{
-			m_EffectSeSource.Play();
-		}
-	}
-
-	public void Play(Vector3 Pos)
-	{
-		m_Pos = Pos;
-		m_GameObjIns.transform.position = m_Pos;
-		On();
-		m_GameObjIns.SetActive(value: true);
-		m_ParticleSystem.Play();
-		if (m_EffectSeSource != null)
-		{
-			m_EffectSeSource.Play();
-		}
-	}
-
-	public void Play(Vector3 Pos, GameObject obj)
-	{
-		m_ChaseObjIns = obj;
-		if (obj != null)
-		{
-			_buff = true;
-		}
-		m_Pos = Pos;
-		m_GameObjIns.transform.position = m_Pos;
-		On();
-		m_GameObjIns.SetActive(value: true);
-		m_ParticleSystem.Play();
-		if (m_EffectSeSource != null)
-		{
-			m_EffectSeSource.Play();
-		}
-	}
-
-	public void Play(float PosX, float PosY, float PosZ)
-	{
-		m_Pos.x = PosX;
-		m_Pos.y = PosY;
-		m_Pos.z = PosZ;
-		m_GameObjIns.transform.position = m_Pos;
-		On();
-		m_GameObjIns.SetActive(value: true);
-		m_ParticleSystem.Play();
-		if (m_EffectSeSource != null)
-		{
-			m_EffectSeSource.Play();
-		}
-	}
-
-	public void Play(float PosX, float PosY)
-	{
-		m_Pos.x = PosX;
-		m_Pos.y = PosY;
-		m_GameObjIns.transform.position = m_Pos;
-		On();
-		m_GameObjIns.SetActive(value: true);
-		m_ParticleSystem.Play();
-		if (m_EffectSeSource != null)
-		{
-			m_EffectSeSource.Play();
-		}
-	}
-
-	public void Play()
-	{
-		On();
-		m_GameObjIns.SetActive(value: true);
-		m_ParticleSystem.Play();
-	}
-
-	public void FadeOut()
-	{
-		m_ParticleSystem.Stop();
-	}
-
-	public void FadeIn()
-	{
-		On();
-		m_ParticleSystem.Play();
-	}
-
-	public void Stop()
-	{
-		Off();
-		m_GameObjIns.SetActive(value: false);
-		m_ParticleSystem.Stop();
-	}
-
-	public void PlayBuff(GameObject obj)
-	{
-		m_Pos = obj.transform.position;
-		m_GameObjIns.transform.position = m_Pos;
-		m_ChaseObjIns = obj;
-		_buff = true;
-		On();
-		UpdatePositionAndRotation();
-		m_GameObjIns.SetActive(value: true);
-		m_ParticleSystem.Play();
-	}
-
-	public void StopBuff()
-	{
-		m_ChaseObjIns = null;
-		_buff = false;
-		Off();
-		m_GameObjIns.SetActive(value: false);
-		m_ParticleSystem.Stop();
-	}
-
-	public void StartLookAtEffect(GameObject fromObject, GameObject toObject)
-	{
-		m_ChaseObjIns = fromObject;
-		m_LookAtObject = toObject;
-		_buff = true;
-		On();
-		UpdatePositionAndRotation();
-		m_GameObjIns.SetActive(value: true);
-		m_ParticleSystem.Play();
-	}
-
-	public void StartLookAtCameraEffect(GameObject fromObject, Camera toCamera)
-	{
-		m_ChaseObjIns = fromObject;
-		_lookAtCamera = toCamera;
-		_buff = true;
-		On();
-		UpdatePositionAndRotation();
-		m_GameObjIns.SetActive(value: true);
-		m_ParticleSystem.Play();
-	}
-
-	public void StopLookAtEffect()
-	{
-		m_ChaseObjIns = null;
-		m_LookAtObject = null;
-		_buff = false;
-		Off();
-		m_GameObjIns.SetActive(value: false);
-		m_ParticleSystem.Stop();
-	}
-
-	private void UpdatePositionAndRotation()
-	{
-		m_GameObjIns.transform.position = m_ChaseObjIns.transform.position;
-		m_GameObjIns.transform.rotation = CalculateRotation();
-	}
-
-	private void UpdateScale()
-	{
-		m_GameObjIns.transform.localScale = m_ChaseObjIns.transform.localScale;
-	}
-
-	private Quaternion CalculateRotation()
-	{
-		if (m_LookAtObject != null)
-		{
-			Vector3 position = m_ChaseObjIns.transform.position;
-			Vector3 position2 = m_LookAtObject.transform.position;
-			float z = Mathf.Atan2(position2.y - position.y, position2.x - position.x) * 57.29578f - 90f;
-			return Quaternion.Euler(0f, 0f, z);
-		}
-		if (_lookAtCamera != null)
-		{
-			Vector3 position3 = m_ChaseObjIns.transform.position;
-			Vector3 position4 = _lookAtCamera.transform.position;
-			return Quaternion.FromToRotation(Vector3.forward, position3 - position4);
-		}
-		return m_ChaseObjIns.transform.rotation;
-	}
-
-	private void Update()
-	{
-		if (!_buff)
-		{
-			return;
-		}
-		if (m_ChaseObjIns != null)
-		{
-			if (_isFollowScale)
-			{
-				UpdateScale();
-			}
-			UpdatePositionAndRotation();
-		}
-		else
-		{
-			StopBuff();
-		}
-	}
-
-	public void On()
-	{
-		m_Use = true;
-	}
-
-	public void Off()
-	{
-		m_Use = false;
-	}
-
-	public void Change()
-	{
-		m_Use = !m_Use;
-	}
-
 	public void ChangeParticleColor(Color color)
 	{
 		MotionUtils.ChangeParticleSystemColor(m_ParticleSystem.gameObject, color);
 	}
 
-	public EffectMgr.EffectType GetEffectType()
-	{
-		return m_Type;
-	}
-
 	public GameObject GetGameObjIns()
 	{
 		return m_GameObjIns;
 	}
-
-	public bool IsOn()
-	{
-		return m_Use;
-	}
-
-	public bool IsPlay()
-	{
-		if (m_ParticleSystem.isPlaying || m_ParticleSystem.isPaused || m_ParticleSystem.IsAlive())
-		{
-			return true;
-		}
-		return false;
-	}
-
-	public GameObject GetChaseObjIns()
-	{
-		return m_ChaseObjIns;
-	}
 }