feat: 修改预约详情接口并调整成功码

src/main/java/com/example/mini_program/service/AppointmentService.java

@@ -60,6 +60,9 @@ public class AppointmentService {
         log.info("查询到 {} 条预约记录", list.size());
         return list;
     }
+    public  VisitApplication  getDetail(String id) {
+        return visitApplicationMapper.selectById(id);
+    }
 
     /**
      * 创建预约记录