update doc api

@@ -76,3 +76,27 @@ public static class OrderSummary {
   "flagEnable": "flagEnable"    // 是否需要邮寄
   "flagEnable": "flagEnable"    // 是否需要邮寄
 }
 }
 ```
 ```
+
+
+
+##### 3. 后台页面赠送学生四会课接口
+
+- URL: {{localhost}}/boxfish-online-card/order/textbook/manage/submitUserOrder
+- Method: POST
+- RequestBody:
+
+```java
+public static class Request {
+    private Long userId;            // 收货人盒子鱼ID
+    private String versionCode;     
+    private Long sourceInvitationCode;  // 该收货人的邀请人
+
+    private String orderName;
+    private String orderMobile;
+
+    private String orderProvince;
+    private String orderCity;
+    private String orderCounty;
+    private String orderAddressDetail;
+}
+```