Implement sidebar, resolves FRONT-912#118

Draft

arentant wants to merge 23 commits intodevfrom

Commits on Apr 13, 2026

Commits on Apr 18, 2026

sidebar initial implementation
yasha-meursault
committed

Commits on Apr 22, 2026

App Router migration follow-ups and cleanup

yasha-meursault
and
claude
committed
App Router: fix Tailwind content globs + migrate to Metadata API

yasha-meursault
and
claude
committed