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/World/Liquid/LiquidZone.cs

@@ -41,14 +41,14 @@ namespace BaseGames.World.Liquid
         {
             if (!other.CompareTag("Player")) return;
             _splashEnterFeedback?.PlayFeedbacks();
-            _onPlayerEntered?.Raise(new LiquidEvent(_zoneId, _liquidType.ToString()));
+            _onPlayerEntered?.Raise(new LiquidEvent(_zoneId, _liquidType));
         }
 
         private void OnTriggerExit2D(Collider2D other)
         {
             if (!other.CompareTag("Player")) return;
             _splashExitFeedback?.PlayFeedbacks();
-            _onPlayerExited?.Raise(new LiquidEvent(_zoneId, _liquidType.ToString()));
+            _onPlayerExited?.Raise(new LiquidEvent(_zoneId, _liquidType));
         }
     }
 }