fix：输入相同的手机号，赠送时长相加

Signed-off-by: tangshizhe <48740614+tangshizhe@users.noreply.github.com>

plugins/gift-friends/src/components/GiftSubmitDialog.vue

@@ -386,8 +386,11 @@ export default {
     async confirmGiftData() {
       // 参数格式：{phones:{18439509554: 1,18439509555: 2}}
       const data = this.personList.reduce((acc, cur) => {
-        if (cur.phone && cur.monthnum) {
-          acc[cur.phone] = cur.monthnum
+        if (acc[cur.phone]) {
+          acc[cur.phone] += Number(cur.monthnum)
+        }
+        else {
+          acc[cur.phone] = Number(cur.monthnum)
         }
         return acc
       }, {})