From 192017b892198458f028638279b27ead309b232b Mon Sep 17 00:00:00 2001
From: pengzhanbo <volodymyr@foxmail.com>
Date: Fri, 31 Oct 2025 18:03:06 +0800
Subject: [PATCH] fix(theme): fix auto-sidebar collapsed (#746)

---
 theme/src/node/prepare/prepareSidebar.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/theme/src/node/prepare/prepareSidebar.ts b/theme/src/node/prepare/prepareSidebar.ts
index 51821e61..b87fbfc3 100644
--- a/theme/src/node/prepare/prepareSidebar.ts
+++ b/theme/src/node/prepare/prepareSidebar.ts
@@ -171,7 +171,7 @@ function getAutoDirSidebar(
         current.icon = frontmatter.icon as ThemeIcon
       }
       if (parent?.items?.length) {
-        parent.collapsed = false
+        parent.collapsed ??= false
       }
       parent = current
       items = current.items as ResolvedSidebarItem[]