- Add .dashboard-shell.sidebar-is-collapsed grid-template-columns: 4rem 1fr
- Hide sidebar-brand-title, section labels, nav labels, project labels when collapsed
- Center icons in collapsed state via justify-content: center on sidebar-nav-link-inner
- Hide sidebar-project-list in collapsed state (no icons for project entries)
- Flip collapse button chevron with rotate(180deg) when collapsed
- Regenerate static/tailwind.css via bin/tailwindcss --minify
