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/StatusEffects/EnemyStatusEffectManager.cs

@@ -0,0 +1,87 @@
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace BaseGames.Enemies.StatusEffects
+{
+    /// <summary>
+    /// 状态效果管理器。
+    /// 挂载在 EnemyBase 同 GameObject，负责激活效果的 Tick、叠加规则与移除。
+    ///
+    /// 设计原则：
+    /// - 同类型效果只保留一个（新效果重置计时）。
+    /// - 每帧在 EnemyBase.Update 中由 Tick 驱动。
+    /// - 敌人死亡时由 EnemyBase.Die 调用 Clear。
+    /// </summary>
+    [DisallowMultipleComponent]
+    public sealed class EnemyStatusEffectManager : MonoBehaviour
+    {
+        private EnemyBase _enemy;
+
+        // 用 List 而非 Dictionary 避免 GC（通常同时激活效果 < 4 个）
+        private readonly List<IStatusEffect> _active = new List<IStatusEffect>(4);
+
+        private void Awake() => _enemy = GetComponent<EnemyBase>();
+
+        // ── 外部 API ──────────────────────────────────────────────────────
+
+        /// <summary>施加效果。同类型效果已存在时先移除旧的再挂新的（刷新）。</summary>
+        public void Apply(IStatusEffect effect)
+        {
+            if (effect == null) return;
+            Remove(effect.Type);   // 移除同类旧效果（刷新逻辑）
+            _active.Add(effect);
+            effect.OnApplied(_enemy);
+        }
+
+        /// <summary>移除指定类型效果（若存在）。</summary>
+        public void Remove(StatusEffectType type)
+        {
+            for (int i = _active.Count - 1; i >= 0; i--)
+            {
+                if (_active[i].Type == type)
+                {
+                    _active[i].OnRemoved(_enemy);
+                    _active.RemoveAt(i);
+                    break;
+                }
+            }
+        }
+
+        /// <summary>查询指定类型效果是否激活。</summary>
+        public bool HasEffect(StatusEffectType type)
+        {
+            for (int i = 0; i < _active.Count; i++)
+                if (_active[i].Type == type) return true;
+            return false;
+        }
+
+        /// <summary>激活效果的只读视图（调试叠加层 / 存档用，非热路径）。</summary>
+        public System.Collections.Generic.IReadOnlyList<IStatusEffect> ActiveEffects => _active;
+
+        /// <summary>移除全部效果（死亡 / 重生时调用）。</summary>
+        public void Clear()
+        {
+            for (int i = _active.Count - 1; i >= 0; i--)
+                _active[i].OnRemoved(_enemy);
+            _active.Clear();
+        }
+
+        // ── 每帧驱动 ─────────────────────────────────────────────────────
+
+        private void Update()
+        {
+            if (_active.Count == 0) return;
+            float dt = Time.deltaTime;
+            for (int i = _active.Count - 1; i >= 0; i--)
+            {
+                var fx = _active[i];
+                fx.Tick(_enemy, dt);
+                if (fx.IsFinished)
+                {
+                    fx.OnRemoved(_enemy);
+                    _active.RemoveAt(i);
+                }
+            }
+        }
+    }
+}