The mobile ResetFiltersButton and the TV filter header each had their own
active-state and reset logic, and both ignored sort & order — so the reset
chip never appeared for a changed sort and reset never restored it.
Centralise both in useFilterReset(libraryId): the chip now reflects a
non-default sort, and reset restores SortName/Ascending and clears the
per-library persisted sort/order/filter preferences so the reset sticks.
