refactor(mill): 优化轧辊备用管理的数据查询和状态更新逻辑

- 修改 MesRollInfoMapper 中条件更新状态方法的参数命名，提升可读性
- 更新 MesRollStandbyMapper 查询接口返回类型为 MesRollStandbyVo
- 重构 MesRollStandbyMapper XML 映射文件中的查询语句，增加位置标签字段
- 将清空操作从物理删除改为逻辑删除，保留数据记录
- 在 MesRollStandbyVo 中新增 positionLabel、remark 和 createTime 字段
- 调整控制器注解配置，移除权限校验并简化接口定义

ruoyi-mill/src/main/resources/mapper/mill/MesRollStandbyMapper.xml

@@ -118,13 +118,33 @@
         </foreach>
     </delete>
 
-    <select id="selectByStand" resultMap="MesRollStandbyResult">
-        <include refid="selectMesRollStandbyVo"/>
-        where line_id = #{lineId} and stand_no = #{standNo}
+    <select id="selectByStand" resultType="com.ruoyi.mill.domain.MesRollStandbyVo">
+        SELECT
+            standby_id, line_id, stand_no, roll_no, roll_type, position,
+            CASE
+                WHEN roll_type = 'BR' AND position = 'UP'   THEN '上支撑辊'
+                WHEN roll_type = 'WR' AND position = 'UP'   THEN '上工作辊'
+                WHEN roll_type = 'WR' AND position = 'DOWN' THEN '下工作辊'
+                WHEN roll_type = 'BR' AND position = 'DOWN' THEN '下支撑辊'
+                ELSE CONCAT(position, roll_type)
+            END AS position_label,
+            diameter, roughness, crown, ready_time, remark, create_time
+        FROM mes_roll_standby
+        WHERE del_flag = 0
+          AND stand_no = #{standNo}
+          <if test="lineId != null">AND line_id = #{lineId}</if>
+        ORDER BY
+            FIELD(roll_type, 'BR', 'WR', 'WR', 'BR'),
+            FIELD(position, 'UP', 'UP', 'DOWN', 'DOWN')
     </select>
 
-    <delete id="clearByStand">
-        delete from mes_roll_standby
-        where line_id = #{lineId} and stand_no = #{standNo}
-    </delete>
+    <!-- 逻辑删除指定产线+机架所有下批轧辊（清空） -->
+    <update id="clearByStand">
+        UPDATE mes_roll_standby
+        SET del_flag = 1
+        WHERE del_flag = 0
+        AND stand_no = #{standNo}
+        <if test="lineId != null">AND line_id = #{lineId}</if>
+    </update>
+
 </mapper>