优化后台管理代码

后台管理 ： http://localhost:5174/admin （直接URL访问）

frontend/src/App.vue

@@ -253,9 +253,9 @@ const getRankBadgeClass = (rank) => {
 }
 
 // 跳转到后台管理
-const goToAdmin = () => {
-  router.push('/admin')
-}
+// const goToAdmin = () => {
+//   router.push('/admin')
+// }
 
 // 页面加载时初始化
 onMounted(() => {
@@ -275,7 +275,6 @@ onMounted(() => {
       <div class="header-section">
         <div class="title-wrapper">
           <h1 class="main-title">AI棒榜</h1>
-          <button class="admin-btn" @click="goToAdmin">管理</button>
         </div>
       </div>
 
@@ -461,10 +460,7 @@ onMounted(() => {
   gap: 10px;
   position: relative;
 }
-.logo-icon {
-  width: 40px;
-  height: 40px;
-}
+
 .main-title {
   font-size: 24px;
   font-weight: bold;
@@ -473,25 +469,6 @@ onMounted(() => {
   font-family: Alatsi, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', SimHei, Arial, Helvetica, sans-serif;
 }
 
-.admin-btn {
-  position: absolute;
-  right: 20px;
-  top: 50%;
-  transform: translateY(-50%);
-  background: #4a90e2;
-  color: white;
-  border: none;
-  border-radius: 6px;
-  padding: 6px 12px;
-  font-size: 12px;
-  cursor: pointer;
-  transition: background-color 0.3s ease;
-}
-
-.admin-btn:hover {
-  background: #357abd;
-}
-
 /* 横幅区域 */
 .banner-section {
   margin: 20px 16px;