- Detail items (Size, Progress, Speed, ETA, Seeds, Peers, Availability,
Completed) now render as inline pill badges with background + border-
radius that wrap naturally on any screen width
- Remove mobile @media override that forced flex-direction:column,
which was causing one-per-line centred layout on small screens
- Availability < 100%: value text shown in red (--danger) bold, both
on card creation and on live SSE update via classList.toggle
- Also ensures updateDownloadCard keeps availability-warning in sync