PublicLayout wraps the routed page in <AnimatePresence> keyed by
pathname+search, so changing ?type=… fully unmounts the page and creates
a fresh FilterChips. A useRef-based save/restore therefore reset on
every filter switch. Persist the scrollLeft in a module-level value
that survives the unmount, restore synchronously on mount, and keep an
~1.5s post-mount watch window for the iOS Safari sticky relayout that
asynchronously snaps scrollLeft back to 0. Also gate the inactive-chip
hover color behind [@media(hover:hover)] so iOS sticky-hover no longer
leaves a faint gold tint on the last-tapped filter.
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