style(components): 为图片添加alt属性以提升可访问性

app/components/home/User.vue

@@ -1,6 +1,6 @@
 <template>
   <div class="user-item">
-    <img width="72" :src="src" class="user1-img" />
+    <img width="72" :src="src" class="user1-img" alt="user" />
     <div class="user1-text">{{ text }}</div>
   </div>
 </template>