Passed by Index to whichever of the "hot", "new" and "journal" tabs is
showing. The tabs share this one state, so switching tabs doesn't refetch.
The tabs read its status and paging, and show dumps instead of its
items.
It holds the loaded dumps, with those WSContext added since and without
the deleted ones.
sentinelRef: Ref<HTMLDivElement>
It comes from useInfiniteScroll, and goes after the last card.