- Use useMobileViewport to detect mobile and position dropdown
centered with left/right margins instead of right-aligned, which
caused overflow on small screens.
- Add a semi-transparent backdrop overlay on mobile so tapping
outside the dropdown naturally closes it.
- Update mobile CSS: notification-dropdown fills screen width
with 0.75rem margins, max-height capped at 70vh for reachability.
- Remove the 360px max-width cap on mobile so the dropdown uses
available screen space properly.
Quality gates: tsc --noEmit (pass), build (pass)
Developer
994b1cf3b7