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/VFX/HurtFlashController.cs

@@ -20,6 +20,7 @@ namespace BaseGames.VFX
 
         private MaterialPropertyBlock _block;
         private Coroutine             _flashCoroutine;
+        private WaitForSeconds        _waitForFlash;
 
         private void Awake()
         {
@@ -27,6 +28,8 @@ namespace BaseGames.VFX
             if (_renderer == null)
                 _renderer = GetComponent<SpriteRenderer>();
             _block = new MaterialPropertyBlock();
+            if (_config != null)
+                _waitForFlash = new WaitForSeconds(_config.HurtFlashDuration);
         }
 
         /// <summary>触发一次闪白动画。若上一次闪白未结束则重置计时器。</summary>
@@ -40,7 +43,7 @@ namespace BaseGames.VFX
         private IEnumerator FlashCoroutine()
         {
             SetFlash(1f);
-            yield return new WaitForSeconds(_config.HurtFlashDuration);
+            yield return _waitForFlash ?? new WaitForSeconds(_config.HurtFlashDuration);
             SetFlash(0f);
             _flashCoroutine = null;
         }