The error state didn't exist as a concept: a failed main query rendered as an "empty" list
("No channels" while the request actually died), so a backend restart read as "everything is
empty". Add the convention that an empty state may NEVER show while a query is erroring.
- New components/QueryState.tsx: shared StateMessage (loading / error+Retry, house style, with
role=status/aria-live — the app had zero live regions).
- DataTable gains loading/error/onRetry props (suppresses empty-text on error).
- isError branch (before the empty branch) added across the false-empty pages: Feed (retry),
Channels, ChannelDiscovery, AuditLog, NotificationsPanel, Messages (conversations + people),
Scheduler, Stats, PlexBrowse grid, PlexPlaylistView. ChannelPage's main content is Feed, now
covered. common.loadError/empty strings (en+hu).
peter
d9a08892a5