optimize: 机器人问答返回结果

smart-health-modules/cloud-upms/cloud-upms-api/src/main/java/cn/sh/stc/sict/cloud/upms/dto/CurrentUser.java

@@ -41,6 +41,6 @@ public class CurrentUser implements Serializable {
     /**
      * 机器人问答
      */
-    private List<List<String>> qaHistory;
+    private String qaHistory;
 
 }