fix(LyCompatibleController): 修复视频列表获取逻辑

- 修改了ContentPageVO的获取方式，使用filter过滤掉contentId为null的记录
- 使用findFirst替换getFirst避免空指针异常
- 确保只有有效的contentId才会被用于后续的视频查询操作

src/main/java/com/ycwl/basic/controller/extern/LyCompatibleController.java

@@ -203,8 +203,9 @@ public class LyCompatibleController {
             return response;
         }
         List<Map<String, Object>> videoList = collect.get(0).stream().collect(Collectors.groupingBy(ContentPageVO::getTemplateId))
-                .values().stream().map(contentPageVOs -> {
-                    ContentPageVO contentPageVO = contentPageVOs.getFirst();
+                .values().stream()
+                .map(contentPageVOs -> {
+                    ContentPageVO contentPageVO = contentPageVOs.stream().filter(vo -> vo.getContentId() != null).findFirst().orElse(null);
                     Map<String, Object> map = new HashMap<>();
                     VideoEntity videoRespVO = videoRepository.getVideo(contentPageVO.getContentId());
                     map.put("id", videoRespVO.getId().toString());