fix():修复场景BUG，人物摔落伤害不对BUG，添加传播控制字段

Assets/Script/Gameplay/Player/PlayerMoveController.cs

@@ -49,6 +49,7 @@ namespace Script.Gameplay.Player
             if (characterController == null)
                 Debug.LogError("PlayerMoveController 需要 CharacterController 组件！");
 
+            lastGroundY = transform.position.y;
             initSpeed = speed;
             playerSound = playerSound != null ? playerSound : GetComponent<AudioSource>();
             if (playerSound == null)
@@ -76,6 +77,7 @@ namespace Script.Gameplay.Player
             // 落地检测
             if (!wasGroundedLastFrame && isCurrentlyGrounded)
             {
+                
                 float fallHeight = lastGroundY - transform.position.y;
                 if (fallHeight > fallDamageThreshold) // 3米为伤害阈值，可调整
                 {