修复可能存在的bug

unity/Assets/UI/SceneLoader.cs

@@ -48,9 +48,13 @@ namespace GameFramework
         public void LoadScoringScene() => Load(scoringScene);
         public void Load(string sceneName)
         {
-            if (isLoading) return;
-            isLoading = true;
+            if (isLoading)
+            {
+                Debug.LogWarning($"[SceneLoader] 上次加载未完成，强制重置并加载: {sceneName}");
                 StopAllCoroutines();
+                isLoading = false;
+            }
+            isLoading = true;
             StartCoroutine(LoadingCoroutine(sceneName));
         }
 
@@ -63,7 +67,16 @@ namespace GameFramework
                     "拖到 SceneLoader 的 transitionImage 字段。");
             }
 
+            Debug.Log($"[SceneLoader] 开始加载场景: {sceneName}");
             var loadingOperation = SceneManager.LoadSceneAsync(sceneName);
+
+            if (loadingOperation == null)
+            {
+                Debug.LogError($"[SceneLoader] 场景 '{sceneName}' 加载失败！请检查 Build Settings 中是否包含该场景。");
+                isLoading = false;
+                yield break;
+            }
+
             loadingOperation.allowSceneActivation = false;
 
             if (transitionImage != null)
@@ -110,6 +123,7 @@ namespace GameFramework
                 transitionImage.gameObject.SetActive(false);
             }
 
+            Debug.Log($"[SceneLoader] 场景加载完成: {sceneName}");
             isLoading = false;
         }
     }