feat: 批量下载弹窗增加开始下载按钮

- 通过创建隐藏 a 标签并点击触发浏览器下载

- 多个下载任务间隔 300ms 触发，降低被浏览器拦截的概率

- 保留复制链接功能作为备选

apps/web/src/pages/Videos.tsx

@@ -41,6 +41,16 @@ const formatSize = (bytes?: number) => {
   return `${size.toFixed(2)} ${units[i]}`;
 };
 
+const getExtFromUrl = (url: string): string => {
+  try {
+    const pathname = new URL(url).pathname;
+    const ext = pathname.split('.').pop();
+    return ext && ext.length <= 5 ? ext : 'mp4';
+  } catch {
+    return 'mp4';
+  }
+};
+
 export default function VideosPage() {
   const user = useAuthStore((state) => state.user);
   const [videos, setVideos] = useState<VideoItem[]>([]);
@@ -115,40 +125,40 @@ export default function VideosPage() {
     }
   };
 
+  const [downloadResults, setDownloadResults] = useState<DownloadResult[]>([]);
+  const [downloadModalOpen, setDownloadModalOpen] = useState(false);
+
   const handleBatchDownload = async () => {
     const ids = selectedRows.map((v) => v.videoId);
     try {
       const results = await batchDownload(ids);
       const valid = results.filter((r) => r.urls.length > 0);
-      showDownloadResults(valid);
+      setDownloadResults(valid);
+      setDownloadModalOpen(true);
       setSelectedRows([]);
     } catch (error) {
       message.error('获取下载地址失败');
     }
   };
 
-  const showDownloadResults = (results: DownloadResult[]) => {
-    Modal.info({
-      title: '批量下载地址',
-      width: 800,
-      content: (
-        <div style={{ maxHeight: 400, overflow: 'auto' }}>
-          {results.map((item) => (
-            <div key={item.videoId} style={{ marginBottom: 12 }}>
-              <Text strong>{item.title || item.videoId}</Text>
-              <ul style={{ margin: 4, paddingLeft: 20 }}>
-                {item.urls.map((url, idx) => (
-                  <li key={idx}>
-                    <Text copyable>{url.url}</Text>
-                    <Tag style={{ marginLeft: 8 }}>{url.definition}</Tag>
-                  </li>
-                ))}
-              </ul>
-            </div>
-          ))}
-        </div>
-      ),
+  const startDownloads = () => {
+    let count = 0;
+    downloadResults.forEach((item) => {
+      item.urls.forEach((urlInfo) => {
+        const link = document.createElement('a');
+        link.href = urlInfo.url;
+        link.target = '_blank';
+        link.rel = 'noreferrer';
+        link.download = `${item.title || item.videoId}_${urlInfo.definition}.${getExtFromUrl(urlInfo.url)}`;
+        document.body.appendChild(link);
+        setTimeout(() => {
+          link.click();
+          document.body.removeChild(link);
+        }, count * 300);
+        count++;
+      });
     });
+    message.success(`已尝试触发 ${count} 个下载任务`);
   };
 
   const handleRowClick = (record: VideoItem) => {
@@ -284,6 +294,37 @@ export default function VideosPage() {
         }}
       />
 
+      <Modal
+        title="批量下载地址"
+        open={downloadModalOpen}
+        width={800}
+        onCancel={() => setDownloadModalOpen(false)}
+        footer={[
+          <Button key="download" type="primary" onClick={startDownloads}>
+            开始下载
+          </Button>,
+          <Button key="close" onClick={() => setDownloadModalOpen(false)}>
+            关闭
+          </Button>,
+        ]}
+      >
+        <div style={{ maxHeight: 400, overflow: 'auto' }}>
+          {downloadResults.map((item) => (
+            <div key={item.videoId} style={{ marginBottom: 12 }}>
+              <Text strong>{item.title || item.videoId}</Text>
+              <ul style={{ margin: 4, paddingLeft: 20 }}>
+                {item.urls.map((url, idx) => (
+                  <li key={idx}>
+                    <Text copyable>{url.url}</Text>
+                    <Tag style={{ marginLeft: 8 }}>{url.definition}</Tag>
+                  </li>
+                ))}
+              </ul>
+            </div>
+          ))}
+        </div>
+      </Modal>
+
       <Drawer
         title="视频详情"
         width={560}