Implement user-provided template design:
- Split nav into Workspace / Account sections with labels
- New CSS design tokens (--nim-*) for sidebar without breaking app vars
- Active indicator: left glow bar via ::before, CSS class nim-nav-active
- Collapsed tooltip via CSS ::after content: attr(data-label)
- Geist font for sidebar via Google Fonts
- 264px expanded / 72px collapsed sidebar widths
- All collapse state driven by html[data-sidebar-collapsed] critical CSS
(no Alpine reactivity needed, works across @persist boundary)
- Mobile: always full expanded sidebar regardless of collapse state
- Icon partial at partials/sidebar-icon with 24px viewBox icons
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
