fix(system-boot_user): 增加用户昵称不能为空的后端校验。

rdms-system/rdms-system-boot/src/main/java/com/njcn/rdms/module/system/controller/admin/user/vo/user/UserSaveReqVO.java

@@ -33,7 +33,8 @@ public class UserSaveReqVO {
     @DiffLogField(name = "用户账号")
     private String username;
 
-    @Schema(description = "用户昵称", requiredMode = Schema.RequiredMode.REQUIRED, example = "awen")
+    @Schema(description = "用户昵称", requiredMode = Schema.RequiredMode.REQUIRED, example = "戴坤")
+    @NotBlank(message = "用户昵称不能为空")
     @Size(max = 30, message = "用户昵称长度不能超过 30 个字符")
     @DiffLogField(name = "用户昵称")
     private String nickname;