feat: 优化导出文件质量

app/templates/items/detail.html

@@ -12,8 +12,17 @@
 <div class="d-flex justify-content-between align-items-center mb-3">
   <h1 class="h3 mb-0">{{ item.title or item.source_item_id }}</h1>
   <div class="d-flex gap-2">
-    <a class="btn btn-outline-primary" href="/api/export/items/{{ item.id }}.md">导出 Markdown 报告</a>
-    <a class="btn btn-outline-secondary" href="/api/export/items/{{ item.id }}/comments.csv">导出评论 CSV</a>
+    <button
+      class="btn btn-outline-primary"
+      onclick="downloadExport('/api/export/items/{{ item.id }}.md', 'item-report.md', event)"
+      {% if not report %}disabled title="报告尚未生成"{% endif %}>
+      导出 Markdown 报告
+    </button>
+    <button
+      class="btn btn-outline-secondary"
+      onclick="downloadExport('/api/export/items/{{ item.id }}/comments.csv', 'item-comments.csv', event)">
+      导出评论 CSV
+    </button>
   </div>
 </div>
 {% if report %}