fix: walkthrough dark-mode and not reachable classes

Fixed not working darkmode and unreachable classes (searchbar and db management)

requested review from @marcos

assigned to @Vink

added 8 commits

• 22b3fb22...ad89b5ff - 7 commits from branch main
• 2d06852a - fix(walkthrough): fixed dark-mode and not reachable classes

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merged

This MR is included in version 1.107.3

The release is available on GitLab release.

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