The library Recommended tab never subscribed to deletion events, so
"Delete from server" left the episode sitting in Continue Watching
until a full reload. Make the tab DeletionAware (remove in place across
all hubs, then resync) and give DiscoverProvider the same subscription
so the home row and hubs drop deleted items too.
close#1486
Signing in triggered two back-to-back profile rebinds; the second re-added
the same Jellyfin connection, which tore down the live client and aborted
the home screen's in-flight fetches. The aborted pass was committed as
loaded-empty, flashing 'no content available' until the follow-up load
landed. Fix at the root instead of patching the sign-in window:
- addJellyfinConnection now reuses the live client when the connection is
unchanged (token, deviceId, URL set), matching the existing Plex
refreshTokensForProfile behavior; material changes still recreate it.
- Cancelled requests are classified end-to-end: the client's
treat-as-empty helpers rethrow cancellations, and the aggregation
fan-outs report cancelledServerIds alongside succeededServerIds.
- A fetch pass in which zero servers succeeded is never authoritative:
it keeps existing content instead of wiping it (also fixes the
pre-existing blanking of home/sidebar on a totally failed refresh),
stays in loading while disrupted (cancellation or binding in flight),
and only commits loaded-empty on a settled failure.
Discover and libraries now fetch only the servers that came online since
the last pass and merge the results; already-loaded servers are not
refetched. Both providers also own their online-servers listener
(registered in the constructor, removed in dispose), so profile switches
no longer leak listeners that kept disposed providers refetching.