From 72c4f4e54d69ec473d8176a8ae98fdf4ed846e0a Mon Sep 17 00:00:00 2001
From: richjohnrambo <richjohnrambo@gmail.com>
Date: Sat, 17 Oct 2026 17:09:06 +0800
Subject: [PATCH] fix: defer revoking group file download URL

---
 web/src/features/groups/GroupFilesModal.tsx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/web/src/features/groups/GroupFilesModal.tsx b/web/src/features/groups/GroupFilesModal.tsx
index 6b415868..c4e56222 100644
--- a/web/src/features/groups/GroupFilesModal.tsx
+++ b/web/src/features/groups/GroupFilesModal.tsx
@@ -128,7 +128,8 @@ export function GroupFilesModal({ topicId, isAdmin, canUpload, onClose }: GroupF
         link.href = url;
         link.download = f.file_name;
         link.click();
-        URL.revokeObjectURL(url);
+        // Keep the object URL alive long enough for the browser to start the download.
+        window.setTimeout(() => URL.revokeObjectURL(url), 1000);
       })
       .catch(() => setDownloadError('文件下载失败，可能已过期'));