fix(course):修复课程视频客服开关逻辑错误

- 调整了 isAddKf 和 isAddKfIsOpen 方法的调用顺序
- 修复了 isOpen 参数为空或为0时的逻辑判断问题
- 确保客服开关功能按照预期正确执行

fs-user-app/src/main/java/com/fs/app/controller/course/CourseQwController.java

@@ -286,9 +286,9 @@ public class CourseQwController extends AppBaseController {
         Long userId = Long.parseLong(getUserId());
         param.setUserId(userId);
         if(param.getIsOpen() == null || param.getIsOpen() == 0){
-            r = courseVideoService.isAddKfIsOpen(param);
-        }else{
             r = courseVideoService.isAddKf(param);
+        }else{
+            r = courseVideoService.isAddKfIsOpen(param);
         }
         return r;
     }