修复内容：

PlayerMovement：新增 _facingLocked 字段 + LockFacing(bool) 方法；UpdateFacing() 锁定时直接返回
WallSlideState：OnStateEnter 调用 LockFacing(true) + FlipFacing(_wallDir)；OnStateExit 调用 LockFacing(false) 解锁
WallJumpState：OnStateEnter 保险性再调一次 LockFacing(false)；WallJumpAway/Toward 同步写入 _inputVelocityX，确保解锁后 UpdateFacing 朝向正确（背墙跳 = 离墙方向，对墙跳 = 朝墙方向）

Assets/_Game/Scripts/World/Puzzle/PuzzleSwitch.cs

@@ -2,6 +2,7 @@
 using System;
 using Animancer;
 using BaseGames.Feedback;
+using BaseGames.Input;
 using BaseGames.World;
 using UnityEngine;
 
@@ -38,6 +39,9 @@ namespace BaseGames.Puzzle
         [Header("持久化（SO 注入，非 Instance 单例）")]
         [SerializeField] private WorldStateRegistry _worldState;
 
+        [Header("Hold 模式输入（SwitchTriggerMode.Hold 时必填）")]
+        [SerializeField] private InputReaderSO _inputReader;
+
         private bool _isActive;
 
         public bool IsActive => _isActive;
@@ -59,16 +63,41 @@ namespace BaseGames.Puzzle
 
         // ── IInteractable ────────────────────────────────────────────────────
         public string InteractPrompt => _mode == SwitchTriggerMode.Hold ? "按住交互" : "交互";
-        public bool   CanInteract    => true;
+
+        /// <summary>
+        /// 压板模式不需要交互提示（物理触发）；InteractOnce 已激活后隐藏提示。
+        /// </summary>
+        public bool CanInteract => _mode switch
+        {
+            SwitchTriggerMode.InteractOnce   => !_isActive,
+            SwitchTriggerMode.InteractToggle => true,
+            SwitchTriggerMode.Hold           => true,
+            SwitchTriggerMode.Pressure       => false,
+            _                                => false,
+        };
 
         public void Interact(Transform player)
         {
+            // Hold 模式通过 OnPlayerEnterRange 订阅输入事件处理，此处不响应
+            if (_mode == SwitchTriggerMode.Hold) return;
             if (_mode == SwitchTriggerMode.InteractOnce && _isActive) return;
             SetState(!_isActive);
         }
 
-        public void OnPlayerEnterRange(Transform player) { }
-        public void OnPlayerExitRange() { }
+        public void OnPlayerEnterRange(Transform player)
+        {
+            if (_mode != SwitchTriggerMode.Hold || _inputReader == null) return;
+            _inputReader.InteractEvent          += OnHoldStarted;
+            _inputReader.InteractCancelledEvent += OnHoldCancelled;
+        }
+
+        public void OnPlayerExitRange()
+        {
+            UnsubscribeHold();
+            // 玩家离开范围时停用 Hold 开关
+            if (_mode == SwitchTriggerMode.Hold && _isActive)
+                SetState(false);
+        }
 
         // ── ISwitchable ──────────────────────────────────────────────────────
         public void ForceState(bool active) => SetState(active);
@@ -106,5 +135,19 @@ namespace BaseGames.Puzzle
                 else        _worldState?.ClearFlag("switch_" + _switchId);
             }
         }
+
+        // ── Hold 模式辅助 ──────────────────────────────────────────────────────
+
+        private void OnHoldStarted()   => SetState(true);
+        private void OnHoldCancelled() => SetState(false);
+
+        private void UnsubscribeHold()
+        {
+            if (_inputReader == null) return;
+            _inputReader.InteractEvent          -= OnHoldStarted;
+            _inputReader.InteractCancelledEvent -= OnHoldCancelled;
+        }
+
+        private void OnDestroy() => UnsubscribeHold();
     }
 }