保留 Tick 作为唯一入口，但让 SimulationWorld 只做 orchestration

- Tick 仍然是唯一仿真入口。SimulationWorld 顶层现在只保留全局开关、bridge 服务和生命周期入口，原来散落在类上的大部分跨域状态已经从 SimulationWorld 收口到新的 SimulationWorld.RuntimeModules。
- 新的 runtime modules 把状态按域分成了 SimulationStateStore、JobDataRuntimeState、CollisionPipelineRuntimeState、TargetSelectionRuntimeState，并通过同名代理把现有 partial 的调用面基本保持不变。
- CollisionPipeline 和 target-selection 的配置也一起下沉到了运行时模块。为了避免现有反射型测试立刻失效，保留了 _collisionQueryInputs 和 _areaCollisionRequests 这两个顶层兼容字段。

Assets/GameMain/Scripts/Simulation/DataChannel/SimulationWorld.JobDataChannel.cs

@@ -1,39 +1,18 @@
 using System.Collections.Generic;
 using Unity.Collections;
-using Unity.Mathematics;
 
 namespace Simulation
 {
     public sealed partial class SimulationWorld
     {
-        // Shared native buffers, collision stats, and channel-level constants.
+        // Shared channel constants plus compatibility fields still reflected by tests.
         private const int CollisionSourceTypeProjectile = 1;
         private const int CollisionSourceTypeArea = 2;
         private const int CollisionShapeCircle = 0;
         private const int CollisionShapeSector = 1;
 
-        private NativeList<EnemyJobInputData> _enemyJobInputs;
-        private NativeList<EnemyJobOutputData> _enemyJobOutputs;
-        private NativeList<EnemyJobOutputData> _enemyJobSeparationOutputs;
-        private NativeList<float2> _enemySeparationPreviousPushes;
-        private NativeList<float2> _enemySeparationCurrentPushes;
-        private NativeList<ProjectileJobInputData> _projectileJobInputs;
-        private NativeList<ProjectileJobOutputData> _projectileJobOutputs;
+        // Kept as top-level fields because current regression tests reflect them directly.
         private NativeList<CollisionQueryData> _collisionQueryInputs;
-        private NativeList<CollisionCandidateData> _collisionCandidates;
-        private NativeParallelMultiHashMap<long, int> _enemySeparationBuckets;
-        private NativeParallelMultiHashMap<long, int> _enemyCollisionBuckets;
         private readonly List<AreaCollisionRequestData> _areaCollisionRequests = new(16);
-        private readonly List<AreaCollisionHitEventData> _areaCollisionHitEvents = new(32);
-        private readonly HashSet<long> _areaCollisionHitDedupKeys = new();
-        private int _lastCollisionQueryCount;
-        private int _lastProjectileCollisionQueryCount;
-        private int _lastAreaCollisionQueryCount;
-        private int _lastCollisionCandidateCount;
-        private int _lastProjectileCollisionCandidateCount;
-        private int _lastAreaCollisionCandidateCount;
-        private int _lastResolvedAreaHitCount;
-        private float _lastCollisionCellSize;
-        private bool _lastCollisionHasEnemyTargets;
     }
 }