[update] 学习资源创建、修改，必须上传文件或输入视频链接

yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/controller/admin/learningresources/vo/LearningResourcesSaveReqVO.java

@@ -24,7 +24,8 @@ public class LearningResourcesSaveReqVO {
     @Schema(description = "文件ID", example = "6506")
     private Long fileId;
 
-    @Schema(description = "文件URL地址，视频封面图", example = "https://www.iocoder.cn")
+    @Schema(description = "文件URL地址、视频封面图", example = "https://www.iocoder.cn")
+    @NotNull(message = "文件内容不能为空")
     private String fileUrl;
 
     @Schema(description = "文件名称，视频链接",example = "https://www.test.com")
@@ -33,4 +34,4 @@ public class LearningResourcesSaveReqVO {
     @Schema(description = "下载量",example = "0")
     private Integer downCount;
 
-}
+}