- Add local Lucide icon system (5 optimized icons)
- Create Apple-style bottom navigation bar (fixed at bottom on mobile)
- Add language toggle (replaces dropdown selector)
- Improve theme support with proper light/dark mode colors
- Add comprehensive ARIA labels and semantic HTML
- Hide main menu on mobile (≤666px) when bottom nav is active
- Add hreflang attributes for language switching
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>