`req` opens its blocking dialog for 400/409/422/5xx only. A 403/404/429 was left to the caller and a
502-504 or lost connection got just the self-clearing connection notice, so 34 mutations without a
reporting onError and 15 direct api writes with a bare or missing catch failed in silence: a hidden
channel that snapped back, a share link that never revoked, a confirmed account delete that ended
with nothing said.
- lib/queryClient: one MutationCache reporter. react-query awaits it BEFORE the mutation's own
onError, so it waits a task and skips a failure the site already reported; the toast title comes
from `meta.failTitle`, `meta.errorShownInline` opts out.
- notifyActionError: title names WHAT failed, the line under it says WHY (`failureReason`: a
structured localized detail, else the status). It marks the error reported (`markReported`), so
nothing reports one failure twice; `notifyKnownFailure` for a site's own specific sentence.
- Every silent site named (45 new HU/EN titles, 4 reasons). Stale "the global dialog shows it"
comments corrected on the job actions, channel block, Plex sync, cookies, download enqueue,
account delete and usePref.
- Channels passed the tag hook's channel id to the reporter as the error; the tag and priority hooks
now report themselves, with the real error.
- A contract test keeps every useMutation naming its failure; CLAUDE.md gains the pattern row.
- history.dom.test: the "navigates only once the entries are back" assertion raced an async act's
macrotask flush (1 in 5 runs); it now asserts from a later popstate listener.
Give equal-weight actions equal-weight feedback (R11).
S1 Plex error toasts: the watched-toggles (card / season mark-all / episode /
info-panel / show mark-all) used to fail silently on 403/404/429; each now surfaces
the server reason via a shared notifyActionError() + resyncs the optimistic flip.
The playback auto-mark-watched stays intentionally silent (a mid-play toast is
noise; the next sync corrects it). New generic lib/actionErrors.ts (Plex + saved
views reuse it; notifyYouTubeActionError delegates its non-403 case to it).
S2 download-done inbox notification: worker.py emits a best-effort type=download_done
notice to the job owner on real completion (regular + edit jobs, not instant
cache-hits), rendered/localized in the inbox with an Open-Downloads link.
S3 optimistic rollbacks: SavedViewsWidget create/rename/toggle-default/remove/reorder
and the inbox revert-state no longer swallow failures — they toast + refetch to
resync (the reorder's optimistic order reverts to server truth).
S4 access-request deny: deny_invite now emails the requester (send_access_denied),
mirroring approve — no more silent limbo.
- notifyYouTubeActionError: on any non-403 error, show the server's own reason (err.detail, e.g.
"Not enough quota left today") instead of the caller's generic fallback, which was discarded
(U-3.2.8). 403 still offers the Connect affordance.
- App boot error now offers a Retry (StateMessage) instead of a dead "Something went wrong" (U-4.2).
- deletePlaylist prefers the server's reason over a blanket "couldn't delete on YouTube" that
misleads when the failure wasn't the YouTube side.
- Already covered in earlier sprints (verified): the live-search "Load more" already surfaces the
quota error inline via err.detail, and ChannelPage subscribe/unsubscribe already route through
notifyYouTubeActionError.
- Extract notifyYouTubeActionError (new lib/youtubeErrors.ts): the "403 → Connect
your YouTube account, else fallback toast" logic was duplicated in Channels.tsx
and ChannelDiscovery.tsx. (Separate file, not lib/notifications, to avoid the
api ↔ notifications import cycle.)
- Extract format.formatCountOrDash(): the `n != null ? formatViews(n) : "—"` count
cell was repeated across the subs/videos columns in Channels + ChannelDiscovery.
- Register channelsTable / channelDiscoveryTable in storage.ts LS instead of bare
"siftlode.*" string literals.
- Delete 7 dead channels.json keys (filterPlaceholder, tags.newTag/createTag,
row.stored/subs/getFullHistory/getFullHistoryHint) from en/hu/de — verified 0
refs (createTag matches were the unrelated api.createTag method, not the key).
Behavior-neutral. tsc green, knip no new unused, localdev boots.
peter