fix(system): 修复选人组件 GROUP BY 不兼容问题

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

jeecg-module-system/jeecg-system-biz/src/main/java/org/jeecg/modules/system/mapper/xml/SysUserMapper.xml

@@ -328,7 +328,7 @@
 
 	<!--根据部门id获取用户数据-->
 	<select id="queryUserByDeptAndROle" resultType="org.jeecg.modules.system.entity.SysUser">
-		SELECT
+		SELECT DISTINCT
 			 u.*
 		FROM
 			sys_user u
@@ -338,6 +338,5 @@
 		where u.user_security_level >= #{secretLevel}
 		  and tem.dept_id LIKE CONCAT('%', #{deptId}, '%')
 		  and tem.role_id = #{roleId}
-		GROUP BY u.username
 	</select>
 </mapper>