生产模块完成任务接口加幂等：重复点击“完成”不应重复生成回执

优化页面体验
任务允许重复但要合并

gear-mes/src/main/resources/mapper/production/GearProductionTaskMaterialMapper.xml

@@ -37,7 +37,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
                     END
                 ) * IFNULL(r.material_num, 0)
             ) AS planQty,
-            mm.unit AS unit
+            CASE WHEN mm.unit IS NULL OR mm.unit = '' THEN '个' ELSE mm.unit END AS unit
         FROM gear_production_task_product p
         JOIN mat_product_material_relation r ON p.product_id = r.product_id AND r.del_flag = 0
         LEFT JOIN mat_material mm ON r.material_id = mm.material_id