style: 批量操作按钮区域改为自适应宽度，不再固定 100%

platform/frontend/index.html

@@ -91,7 +91,7 @@
           </div>
           <div v-if="currentPage === 'topics'" style="width: calc(100vw - 160px); max-width: calc(100vw - 160px); overflow-x: auto;">
             <div class="flex justify-between items-center mb-6"><h2 class="text-2xl font-bold text-gray-800">📋 选题管理</h2></div>
-            <div class="card mb-6"><div class="flex flex-wrap gap-2 items-center">
+            <div class="card mb-6" style="display: inline-block; min-width: fit-content;"><div class="flex flex-wrap gap-2 items-center">
               <el-button type="primary" size="small" @click="refreshAll">🔄 批量刷新</el-button>
               <el-button type="success" size="small" @click="triggerGenerateSelected" :disabled="selectedTopicIds.length === 0">▶ 批量创作</el-button>
               <el-button type="warning" size="small" @click="triggerOptimizeSelected" :disabled="selectedTopicIds.length === 0">🔍 批量优化</el-button>
@@ -105,7 +105,7 @@
               <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">
-              <el-table :data="filteredTopics" style="width: 100%; max-width: 100%;"> stripe v-loading="loadingTable" :row-key="topic => topic.id" @selection-change="selectedTopicIds = $event">
+              <el-table :data="filteredTopics" style=" max-"> 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="70" fixed></el-table-column>
                 <el-table-column prop="title" label="标题" min-width="220"></el-table-column>