feat(enemy): EnemyLocomotion 按模式驱动步态动画(Idle/Walk/Alert/Run)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Assets/_Game/Scripts/Enemies/EnemyBase.cs

@@ -487,6 +487,21 @@ namespace BaseGames.Enemies
             }
         }
 
+        /// <summary>按当前移动模式播放步态动画（由 EnemyLocomotion 在模式变化时调用）。</summary>
+        public void PlayLocomotionClip(LocomotionMode mode)
+        {
+            if (_animancer == null || _animConfig == null) return;
+            var clip = mode switch
+            {
+                LocomotionMode.Idle     => _animConfig.Idle,
+                LocomotionMode.Patrol   => _animConfig.Walk,
+                LocomotionMode.Face     => _animConfig.Alert,
+                LocomotionMode.Approach => _animConfig.Run,
+                _ => null,
+            };
+            if (clip != null) _animancer.Play(clip);
+        }
+
         // ── 动画事件钩子（由 EnemyAnimationEvents 调用）────────────────────
 
         /// <summary>

Assets/_Game/Scripts/Enemies/Navigation/EnemyLocomotion.cs

@@ -18,6 +18,8 @@ namespace BaseGames.Enemies
         private LocomotionMode _mode = LocomotionMode.Idle;
         private Transform _approachTarget;
         private Vector2 _facePoint;
+        private LocomotionMode _gaitMode;
+        private bool _gaitInit;
 
         public LocomotionMode CurrentMode => _mode;
         public bool IsMoving => _enemy != null && _enemy.Nav != null && _enemy.Nav.IsMoving;
@@ -69,6 +71,12 @@ namespace BaseGames.Enemies
         private void Update()
         {
             if (_enemy == null) return;
+            if (!_gaitInit || _gaitMode != _mode)
+            {
+                _enemy.PlayLocomotionClip(_mode);
+                _gaitMode = _mode;
+                _gaitInit = true;
+            }
             switch (_mode)
             {
                 case LocomotionMode.Idle: