WidgetStore keeps the JSON file (same atomic-write/lock pattern as store.py) and
migrates any old pages.json in place. WidgetData fetches each live widget's own
base_url server-side, normalises Sonarr/Radarr/Plex payloads into one row shape,
caches per <id>@<updated_at> behind UWUDASH_WIDGET_CACHE_TTL, and relays artwork
through /api/widgets/{id}/image so the browser never needs the internal host.
Home now renders one merged calendar timeline, one card per recent widget, then
notices; the Settings table carries a Test button that bypasses the cache.
Archibold