refactor(sip): 优化项目信息查询功能

- 在项目信息查询中，如果 t4.work_time 为空，则使用 t1.update_time 作为 last_work_update_time
- 添加按项目代码降序排序，以优化查询结果的展示顺序

ruoyi-sip/src/main/resources/mapper/sip/ProjectInfoMapper.xml

@@ -71,7 +71,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
                t1.customer_user_name,t1.customer_phone,t1.partner_email,t1.partner_user_name,t1.h3c_person,t1.poc,t1.h3c_phone,
                t2.agent_name,t2.contact_email,t2.contact_phone,t2.contact_person,
                t3.user_name as hz_support_user_name,
-               t4.work_time as last_work_update_time
+               ifnull(t4.work_time,t1.update_time) as last_work_update_time
         from project_info t1
                  left join agent_info t2 on t1.agent_code = t2.agent_code
         left join sys_user t3 on t1.hz_support_user=t3.user_id
@@ -170,6 +170,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
             <if test="keyProblem != null  and keyProblem != ''"> and t1.key_problem = #{keyProblem}</if>
             <if test="projectDesc != null  and projectDesc != ''"> and t1.project_desc = #{projectDesc}</if>
         </where>
+        order by t1.project_code desc
     </select>
     
     <select id="selectProjectInfoById" parameterType="Long" resultMap="ProjectInfoResult">