An airing show is ongoing (follow for new episodes) AND has a back-catalog you
may be missing (acquire) — so it needs both controls, not one or the other.
VideoGet.cardButton() now returns a control GROUP:
person -> eye | movie -> get | airing show -> eye + get | ended show -> get
Library + watchlist-page cards route through it (the other surfaces already did).
New .vcard-ctrls wrapper lays the buttons out top-right; hover-reveal unchanged.
(Before, only ended shows showed the download button — which is why airing
shows looked like they had no way to acquire missing episodes.)
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