Created NavBar.astro component with:
- Site name link 'Crash Test Dev' and Posts nav link with active state detection
- aria-label='Site navigation' and aria-current='page' accessibility attributes
- Responsive stacking at 599px breakpoint
- Design token-based styling (structure font, border-subtle, etc.)
- Updated index.astro to include NavBar in nav slot
- Added comprehensive build-output tests (24 assertions)
Generated with Amplifier
Co-Authored-By: Amplifier <240397093+microsoft-amplifier@users.noreply.github.com>
Ken