The 'No backups from other hosts visible…' empty state was rendering as
centred text inside the outer card, which read as floating prose rather
than a defined block. Wrapped it in a bordered callout (matches the
visual weight of the per-app task cards): rounded border, surface-2
background, padding, plus a centred location-pin glyph above the
message and the existing 'Open Locations' button as the CTA.
Inline styles so it works against the existing theme vars without
needing a new CSS rule.
Signed-off-by: librelad <librelad@digitalangels.vip>
4cda8490ce