fix: 修复多处表单验证与数据流转的缺陷，优化系统消息推送逻辑

hsy

2026-08-31 1704e30de33833817a5fce4c4ab0b94ac8ce1cc6

 src/main/java/com/ruoyi/basic/dto/StorageBlobVO.java

@@ -10,8 +10,14 @@
     */
    private String previewURL;


    private String url;
    private String name;

    /**
     * 下载地址
     */
    private String downloadURL;

    private Long storageAttachmentId;
}