feat: Implement Room Streaming System

- Add RoomStreamingManager to manage room loading and unloading based on player proximity.
- Create StreamingBudgetConfigSO for memory and performance budgeting of the streaming system.
- Introduce TransitionDirector to handle seamless and atmospheric fade transitions between rooms.
- Develop WorldGraph to represent room connectivity and facilitate neighbor queries and distance calculations.
- Implement RoomNode and RoomEdge classes to structure room data and connections.

Assets/_Game/Scripts/Enemies/FlyingEnemy.cs

@@ -4,12 +4,23 @@ using BaseGames.Combat;
 namespace BaseGames.Enemies
 {
     /// <summary>
-    /// 飞行敌人。不依赖 PathBerserker2d 导航，直接通过 Rigidbody2D 向玩家移动。
-    /// 接触玩家时造成伤害。
+    /// 飞行敌人基类。
+    ///
+    /// 导航由 <see cref="Navigation.FlyingDirectNavigator"/> 实现（IPathAgent），
+    /// AI 行为逻辑由挂载的 Behavior Designer 树驱动。
+    /// 本类仅负责：
+    /// <list type="bullet">
+    ///   <item>Rigidbody2D 无重力初始化</item>
+    ///   <item>接触伤害（OnTriggerStay2D）</item>
+    ///   <item>StopMovement / MoveInDirection 的 Rigidbody2D 快速移动重写</item>
+    /// </list>
     /// </summary>
     public class FlyingEnemy : EnemyBase
     {
-        [SerializeField] private float          _chaseSpeed  = 3f;
+        [Header("飞行移动（快速覆盖速度）")]
+        [SerializeField] private float _moveSpeed = 3f;
+
+        [Header("接触伤害")]
         [SerializeField] private DamageSourceSO _contactDamageSource;
 
         private Rigidbody2D _rb;
@@ -20,26 +31,11 @@ namespace BaseGames.Enemies
             _rb = GetComponent<Rigidbody2D>();
             if (_rb != null)
             {
-                _rb.gravityScale  = 0f;
-                _rb.constraints   = RigidbodyConstraints2D.FreezeRotation;
+                _rb.gravityScale = 0f;
+                _rb.constraints  = RigidbodyConstraints2D.FreezeRotation;
             }
         }
 
-        protected override void Update()
-        {
-            base.Update();
-
-            if (_playerTransform == null || _rb == null) return;
-            if (CurrentState == EnemyStateType.Dead ||
-                CurrentState == EnemyStateType.Stagger) return;
-
-            // 向玩家移动
-            Vector2 targetPos = _playerTransform.position;
-            Vector2 myPos     = _rb.position;
-            Vector2 newPos    = Vector2.MoveTowards(myPos, targetPos, _chaseSpeed * Time.deltaTime);
-            _rb.MovePosition(newPos);
-        }
-
         public override void StopMovement()
         {
             if (_rb != null) _rb.velocity = Vector2.zero;
@@ -47,13 +43,14 @@ namespace BaseGames.Enemies
 
         public override void MoveInDirection(float dir)
         {
-            if (_rb != null) _rb.velocity = new Vector2(dir, 0f) * _chaseSpeed;
+            if (_rb != null) _rb.velocity = new Vector2(dir * _moveSpeed, 0f);
         }
 
         private void OnTriggerStay2D(Collider2D other)
         {
             if (_contactDamageSource == null) return;
             if (CurrentState == EnemyStateType.Dead) return;
+            if (_rb == null) return;
 
             var hurtBox = other.GetComponent<HurtBox>();
             if (hurtBox == null) return;