- Parallelize the six celery inspect.*() calls in /library/maintenance/ worker-status via asyncio.gather + to_thread, and drop per-call timeout from 1.0s to 0.5s. Endpoint goes from ~6.1s to ~0.54s — it was the sole bottleneck on opening the Settings dialog. - SettingsDialog now fetches through React Query with enabled:isOpen, so reopening shows cached data instantly while a background refetch updates. Worker polling moved to refetchInterval. Loading spinners only show when there's no cached data yet, so background refetches don't keep them spinning. - Move the Settings entry point from the TopBar to a pinned row at the bottom of the LeftSidebar so it sits alongside the other library controls. TopBar no longer takes onOpenSettings. - Remove the "Scan all folders" bottom action from LeftSidebar — the same control already lives in Settings → Library → Re-scan. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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