Twine 2.9.0 is out, and so is Chapbook 2.1.0. Release notes: https://twinery.org/reference/en/release-notes/2-9.html, https://klembot.github.io/chapbook/guide/references/version-history.html#210-16-june-2024
twinery.org2.9 versions
Chapbook now has light/dark theme switching, and responsive typography (e.g. text grows in size in response to viewport width) that you can configure. It also has a way to do basic setter links.