Two Sonarr-parity features.
1) Per-episode live tracking. "Grab season" was headless (only a button label
changed); episode rows had a status span that was never populated. Now every
episode ROW shows its own live state — Searching → Downloading % → Downloaded
/ Failed — via epTrack() polling /downloads/status?id, matching the inline
movie tracker. Grab season lights all target rows at once; manual + per-source
auto grabs also light their row; reopening the modal resumes tracking in-flight
episodes (resumeEpisodeTracking via /downloads/active + search_ctx match).
Season batch grabs through the same payload as a manual grab (_pickAndGrab →
sendGrab(buildGrabPayload)).
2) Auto-wishlist airing episodes. New daily automation (video_add_airing_episodes):
reads the calendar for episodes airing TODAY for followed shows, skips owned
ones, adds the rest to the wishlist (idempotent). Handler uses injected seams
(calendar read + wishlist write) so it's unit-tested without a DB/server.
Registered + action block + seeded as a daily system automation (01:00),
owned_by=video.
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