[Bug]: outline does not display when window width >= 960 && < 1280

[JounQin]

Version

System:
OS: macOS 15.0.1
CPU: (10) arm64 Apple M1 Max
Memory: 3.53 GB / 64.00 GB
Shell: 5.9 - /bin/zsh
Browsers:
Chrome: 130.0.6723.92
Safari: 18.0.1
npmPackages:
@rspress/core: ^1.35.2 => 1.35.2

Details

I recommend to render TOC in document in this case or even for mobile mode.

Reproduce link

https://rspress.dev/guide/start/introduction

Reproduce Steps

N/A