Refactor code structure for improved readability and maintainability

Assets/_Game/Scripts/Enemies/E003_YouZhi.cs

@@ -0,0 +1,34 @@
+using System.Collections;
+using Animancer;
+using UnityEngine;
+
+namespace BaseGames.Enemies
+{
+    /// <summary>
+    /// E003 幼蛭。HP=1，一击即死。
+    /// 支持双路初始化：
+    /// - 预置路径：场景战斗触发器调用 <see cref="ActivateFromCeiling"/>
+    /// - 对象池路径：E005 死亡时通过 <see cref="OnSpawn"/> 自动触发
+    /// 能力脚本 <c>AnimatedCeilingDropAbility</c> 负责 Fall 动画 + 物理下落 + SetAiPhase(Patrol)。
+    /// </summary>
+    public class E003_YouZhi : EnemyBase
+    {
+        [Tooltip("对象池生成时是否立即执行下落能力（E005 触发生成路径）")]
+        [SerializeField] private bool _activateOnSpawn = true;
+
+        public override void OnSpawn()
+        {
+            base.OnSpawn();
+            if (_activateOnSpawn)
+                Abilities.Get("e003_fall")?.Execute();
+        }
+
+        /// <summary>
+        /// 场景预置路径：由场景触发器（EventTrigger / Animator Event）调用，触发天花板跌落。
+        /// </summary>
+        public void ActivateFromCeiling()
+        {
+            Abilities.Get("e003_fall")?.Execute();
+        }
+    }
+}