v11 全量评审：修复 TD-13 至 TD-17

- TD-13: IQuestManager.CompleteQuest 改用 IRewardTarget，移除 using BaseGames.Player
- TD-14: HurtFlashController 缓存 WaitForSeconds（_waitForFlash 字段）
- TD-16: LiquidType 枚举迁移至 BaseGames.Core.Events；LiquidEvent.LiquidType 改为枚举直接比较
- TD-17: DeathScreenController 移除失效的 _onPlayerDied 订阅，改为 OnEnable 直接启动延迟显示

影响文件: IQuestManager.cs / HurtFlashController.cs / LiquidType.cs(迁移) /
  LiquidEvent.cs / LiquidZone.cs / WaterDangerState.cs /
  UnderwaterPostProcessingController.cs / UnderwaterAudioController.cs /
  DeathScreenController.cs

评审文档: Docs/Review/FrameworkReview_2026_May_v11.md（综合评分 9.30/10）

Assets/Scripts/Audio/UnderwaterAudioController.cs

@@ -3,7 +3,6 @@
 using UnityEngine;
 using UnityEngine.Audio;
 using BaseGames.Core.Events;
-using BaseGames.World.Liquid;
 
 namespace BaseGames.Audio
 {
@@ -34,13 +33,13 @@ namespace BaseGames.Audio
 
         private void OnLiquidEntered(LiquidEvent evt)
         {
-            if (evt.LiquidType == nameof(LiquidType.Water))
+            if (evt.LiquidType == LiquidType.Water)
                 EnterWater();
         }
 
         private void OnLiquidExited(LiquidEvent evt)
         {
-            if (evt.LiquidType == nameof(LiquidType.Water))
+            if (evt.LiquidType == LiquidType.Water)
                 ExitWater();
         }