修复 excel模板下载错误

templates/items_list.html

@@ -211,6 +211,7 @@
     {% endblock %}
 
     <script>
+        const excel_upload_config = {{ excel_upload_config|safe }};
         const add_url = "{{ add_url }}";
         const modify_url = "{{ modify_url }}";
         const deleteUrl = "{{ delete_url }}";