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/CrumblePlatform.cs

@@ -18,6 +18,11 @@ namespace BaseGames.World
         [SerializeField] private SceneFeedback _crumbleFeedback;        // 预警震动 + 碎裂粒子 + 音效
         [SerializeField] private BoxCollider2D _passengerSensor;        // IsTrigger，检测玩家踩踏
 
+        [Header("持久化（_isOneShot = true 时生效）")]
+        [Tooltip("平台唯一 ID。_isOneShot=true 时碎裂状态写入 WorldStateRegistry，重载场景后不复原。留空则不持久化。")]
+        [SerializeField] private string             _platformId;
+        [SerializeField] private WorldStateRegistry _worldState;
+
         private BoxCollider2D  _col;
         private SpriteRenderer _sr;
         private bool           _isCrumbling;
@@ -28,6 +33,18 @@ namespace BaseGames.World
             _sr  = GetComponent<SpriteRenderer>();
         }
 
+        private void Start()
+        {
+            // 读档恢复：_isOneShot 平台已碎裂则直接禁用，无需等待触发
+            if (!_isOneShot || string.IsNullOrEmpty(_platformId) || _worldState == null) return;
+            if (!_worldState.HasFlag("crumble_" + _platformId)) return;
+
+            _isCrumbling    = true;
+            _col.enabled    = false;
+            _sr.enabled     = false;
+            if (_passengerSensor != null) _passengerSensor.enabled = false;
+        }
+
         private void OnTriggerEnter2D(Collider2D other)
         {
             if (_isCrumbling) return;
@@ -53,7 +70,12 @@ namespace BaseGames.World
                 _passengerSensor.enabled = false;
 
             if (_isOneShot || _respawnDelay <= 0f)
-                yield break;  // 永久消失
+            {
+                // 持久化一次性碎裂状态，场景重载后不复原
+                if (_isOneShot && !string.IsNullOrEmpty(_platformId))
+                    _worldState?.SetFlag("crumble_" + _platformId);
+                yield break;
+            }
 
             // 4. Respawn
             yield return new WaitForSeconds(_respawnDelay);