- Make nav bar fixed on mobile with safe-area-inset-top support for
notched devices (10% reduction) and 1rem minimum for non-notched
- Adjust timeline sticky month headings to sit flush below the fixed
nav with matching top/bottom padding
- Update IntersectionObserver rootMargin to account for fixed nav height
so stuck-state accent border triggers correctly
- Increase main content top padding on mobile for balanced spacing on
detail pages
- Add remaining field to bag edit form with +/- stepper buttons
- Make admin page passkey/token forms responsive with icon-only mobile
delete/revoke buttons
- Make detail page action buttons stack vertically on mobile with equal
width
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