fix: 用户名去除首位空格

src/pages/login.vue

@@ -17,7 +17,7 @@
       <div class="pwd">
         <div class="pwd-input">
           <input
-            id="userInput" v-model="username" class="user" type="text"
+            id="userInput" v-model.trim="username" class="user" type="text"
             placeholder="请输入用户名/手机号" >
         </div>
         <div v-if="username" class="delete" @click="clearAccount">