完善页面布局

pages/mall/admin/system-settings.uvue

@@ -1,26 +1,6 @@
 <template>
   <AdminLayout current-page="system">
     <view class="system-settings">
-      <!-- 页面标题 -->
-      <view class="page-header">
-        <text class="page-title">系统设置</text>
-        <text class="page-subtitle">管理系统基础配置和参数</text>
-      </view>
-
-      <!-- Tab 切换栏 -->
-      <view class="tab-bar">
-        <view
-          v-for="tab in tabs"
-          :key="tab.key"
-          class="tab-item"
-          :class="{ 'active': activeTab === tab.key }"
-          @click="switchTab(tab.key)"
-        >
-          <text class="iconfont tab-icon">{{ tab.icon }}</text>
-          <text class="tab-title">{{ tab.title }}</text>
-        </view>
-      </view>
-
       <!-- 设置分类导航 -->
       <view class="settings-nav">
         <view