Bump navbar, docs, legal, and community layouts from max-w-5xl to
max-w-6xl. Widen docs content from max-w-2xl to max-w-3xl. Home and
blog pages unchanged. Disable next-themes transition on change.
- Overlay covers entire viewport (inset-0 z-40) including header
- Drawer at z-50 spans full height with its own header row
- Duplicate theme toggle + close (X) button inside drawer
- Docs sidebar/FAB bumped to z-50 to stay above overlay
Extract drawer logic (overlay, focus trap, scroll lock, escape key)
from DocsNav into shared mobile-drawer.tsx hook and components.
SiteHeader now shows a hamburger menu on mobile that opens a
right-side drawer with nav links and download button. Footer
wraps gracefully on small screens.
