style: 缩小左侧菜单宽度至 160px，表格添加横向滚动防止超出边界

platform/frontend/index.html

@@ -104,7 +104,7 @@
               <el-tag size="large" :type="filterStatus === '待发布' ? 'primary' : ''" @click="filterStatus = '待发布'">待发布 ({{ countByStatus('待发布') }})</el-tag>
               <el-tag size="large" :type="filterStatus === '已发布' ? 'primary' : ''" @click="filterStatus = '已发布'">已发布 ({{ countByStatus('已发布') }})</el-tag>
             </div>
-            <div class="card">
+            <div class="card" style="overflow-x: auto;">
               <el-table :data="filteredTopics" stripe v-loading="loadingTable" :row-key="topic => topic.id" @selection-change="selectedTopicIds = $event">
                 <el-table-column type="selection" width="55"></el-table-column>
                 <el-table-column prop="id" label="ID" width="80" fixed></el-table-column>