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/Quest/IQuestManager.cs

@@ -1,4 +1,3 @@
-using BaseGames.Player;
 using QuestStateEnum = BaseGames.Core.Events.QuestState;
 
 namespace BaseGames.Quest
@@ -12,8 +11,8 @@ namespace BaseGames.Quest
         /// <summary>接取任务（幂等）。</summary>
         void AcceptQuest(string questId);
 
-        /// <summary>完成任务并发放奖励。</summary>
-        void CompleteQuest(string questId, PlayerStats player);
+        /// <summary>完成任务并发放奖励。rewardTarget 接收奖励（如玩家）。</summary>
+        void CompleteQuest(string questId, IRewardTarget rewardTarget);
 
         /// <summary>返回当前任务状态。未知 questId 返回 Unavailable。</summary>
         QuestStateEnum GetState(string questId);