更新用户信息签名显示

src/views/user/Profile.vue

@@ -26,7 +26,8 @@
               </el-button>
             </el-row>
             <el-row>
-              <span>玩偶姐姐</span>
+              <span v-if="user.intro !== null">{{user.intro}}</span>
+              <span v-if="user.intro === undefined || user.intro === null">此用户没有签名</span>
             </el-row>
             <el-row>
               <router-link target="_blank" :to="`/user/` + user.userId + '/following'">