[Bug]: preview command does not work with base option enabled

[JounQin]

Version

System:
OS: macOS 15.0.1
CPU: (10) arm64 Apple M1 Max
Memory: 3.78 GB / 64.00 GB
Shell: 5.9 - /bin/zsh
Browsers:
Chrome: 130.0.6723.91
Safari: 18.0.1
npmPackages:
@rspress/core: ^1.35.1 => 1.35.1

Details

https://v6zdkq-4173.csb.app/docs

Reproduce link

https://codesandbox.io/p/devbox/quiet-feather-v6zdkq

Reproduce Steps

1. run npm i && npm run build && npm run preview
2. open http://localhost:4173/docs

[SoonIter]

cannot reproduce it

[JounQin]

OK, I found the issue is that base: 'docs' works fine on development, but it requires to be /docs on previewing. Seems a bit inconsistent. :(

[JounQin]

And if server: {open: true} is provided, it will open browser without base which results a 404 page immediately.

[Timeless0911]

And if server: {open: true} is provided, it will open browser without base which results a 404 page immediately.

server: {
  open: '/docs',
},

see https://rsbuild.dev/config/server/open#serveropen for more details.