feat(enemy): ICombatant 增加 HasEligibleAttack/UseBestAttack + EnemyBase 构建选择器

Assets/_Game/Scripts/Enemies/EnemyBase.cs

@@ -221,6 +221,9 @@ namespace BaseGames.Enemies
         /// <summary>能力注册表（架构 §8.3）。Awake 时自动收集所有 EnemyAbilityBase 组件。</summary>
         public EnemyAbilityRegistry    Abilities       => _abilities;
         private readonly EnemyAbilityRegistry _abilities = new EnemyAbilityRegistry();
+        /// <summary>攻击选择器（从已注册能力里筛出 category==Attack 的候选，Awake 时构建）。</summary>
+        public Abilities.EnemyAttackSelector AttackSelector => _attackSelector;
+        private Abilities.EnemyAttackSelector _attackSelector;
         /// <summary>由 _onPlayerSpawned 事件缓存的玩家 Transform，供 BD 任务读取。</summary>
         public Transform               PlayerTransform => _playerTransform;
         /// <summary>感知 Hub；供 BD 任务及 QuotaManager 暂停/恢复感知使用。</summary>
@@ -537,6 +540,7 @@ namespace BaseGames.Enemies
             _pooledObject  = GetComponent<PooledObject>();
             _brain         = GetComponent<EnemyAiBrain>();
             _abilities.CollectFrom(gameObject);
+            BuildAttackSelector();
             _colliders     = GetComponentsInChildren<Collider2D>(true);
 
             // 收集配置型行为模块（零代码扩展点）
@@ -552,6 +556,30 @@ namespace BaseGames.Enemies
             // 订阅在 OnEnable 中处理
         }
 
+        /// <summary>
+        /// 从已注册能力里收集 category==Attack 的候选，构建攻击选择器。
+        /// 根因校验：攻击招 rangeRadius<=0（永远够不着）显式报错，不静默兜底。
+        /// </summary>
+        private void BuildAttackSelector()
+        {
+            var candidates = new System.Collections.Generic.List<Abilities.IAttackCandidate>();
+            var all = _abilities?.All;
+            if (all != null)
+            {
+                for (int i = 0; i < all.Count; i++)
+                {
+                    var ab = all[i];
+                    if (ab == null || ab.Config == null) continue;
+                    if (ab.Config.category != Abilities.AbilityCategory.Attack) continue;
+                    if (ab.Config.rangeRadius <= 0f)
+                        Debug.LogError($"[EnemyBase] 攻击招 '{ab.Config.abilityId}' 的 rangeRadius<=0，" +
+                                       "永远够不着玩家。请在其 EnemyAbilitySO 上配置攻击触发半径。", ab);
+                    candidates.Add(ab);
+                }
+            }
+            _attackSelector = new Abilities.EnemyAttackSelector(candidates);
+        }
+
         protected virtual void Update()
         {
             _stats?.TickAttackCooldown(Time.deltaTime);