Checkpoint 5 & Checkpoint 6：

- SimulationWorld 只做逻辑计算与数据输出，不再直接写 Transform
- 在 ShowEntitySuccess 中接入 Pickup/Projectile 占位注册：
	- Drop 走 UpsertPickup(...)
	- Bullet/Projectile 走 UpsertProjectile(...)
- 在 HideEntityComplete 中接入对应回收：
	- Drop 走 RemovePickupByEntityId(...)
	- Bullet/Projectile 走 RemoveProjectileByEntityId(...)
- 新增占位数据构造：
	- CreatePickupSimData(...)
	- CreateProjectileSimData(...)
- 调整 EnemyManagerComponent 职责，现在只管“敌人相关”：
	- 敌人刷怪节奏
	- 敌人列表缓存与计数
	- 玩家引用与 enemy.SetTarget(...)
- 新增嵌套类 SimulationWorld.Presentation，专门消费 EnemySimData 并回写 position/rotation
- 新增嵌套类 SimulationWorld.EntitySync 负责“Simulation 同步”：
	- 监听 ShowEntitySuccess/HideEntityComplete
	- 同步 Enemy/Drop/Projectile 到 SimulationWorld
	- 敌人 SimData 构建、Pickup/Projectile 占位数据构建

Assets/Launcher.unity

@@ -1407,7 +1407,7 @@ Transform:
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 1652245190}
   serializedVersion: 2
-  m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
+  m_LocalRotation: {x: -0, y: -0, z: -0, w: 1}
   m_LocalPosition: {x: 0, y: 0, z: 0}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_ConstrainProportionsScale: 0
@@ -1426,6 +1426,7 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 8a558ebbc9cb4d94946ac9f4f27914d8, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
+  _useSimulationMovement: 0
 --- !u!1 &1852670052
 GameObject:
   m_ObjectHideFlags: 0