Font unification:
- Add @fontsource packages for Geist Sans, Geist Mono, Playfair Display
- Create fonts.ts for centralized font imports
- Import fonts in both web (layout.tsx) and desktop (main.tsx)
- Register --font-brand in Tailwind @theme inline block
- Fix font-brand class usage (replace arbitrary value syntax)
Design system documentation:
- Add comprehensive design philosophy comments to globals.css
- Document typography choices (why Geist, why Playfair for brand)
- Document color system approach (neutral grays, semantic colors only)
- Explain component library customizations
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>