The Activity tab only knew Celery — the GPU agent (the majority of processing)
and the download pipeline were invisible there. Two new self-polling panels:
- GpuActivityPanel: queue depths + triage verdicts (defects / file-ok /
unprobed, top reason buckets) with a jump to Maintenance -> Failed
processing. The triage detail refetches only when the error count moves.
- DownloadsActivityPanel: 24h stat chips + failing-source names with a jump
into Subscriptions.
Both panels join the Activity tab under Queues+workers AND double as the
Overview health strip (side-by-side grid under the Celery summary) — one
component set, so Overview answers 'is everything healthy?' across all
systems. SystemStatsCards reviewed: content still accurate, left as-is.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CDgx8bQS5YrGRK76v8HUnM
