`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.
Round 5 taught `notifyActionError` to discard a plain-string `detail` in favour
of the caller's translated fallback, because `req` leaves 403/404/429 to the
caller and those routes hand-write English. Three places did not get the
message.
**The demo account lost its explanation.** `require_human` refused with a plain
string, so from that commit on the shared demo account got its caller's generic
"couldn't do that" and no hint that the demo account was the reason — and the
gate is not backed by a UI gate everywhere: the comfort shelf has no `is_demo`
check, so the pin button is live and simply fails. A structured `{code: "demo"}`
and an `errors.demo` string in both locales. The two auth routes that hand-roll
the same check were swept with it.
**`ChatThread` carried a second copy of the contract.** It filtered 404/429
itself and then did `e.detail || t(…)`, the pre-fix order, so the central fix
could not reach it and "That member hasn't set up messaging yet." stayed English
under a Hungarian UI. It goes through the shared helper now, and a contract test
pins the remaining raw-`detail` consumers as an explicit SET — never a count —
so a new copy fails the gate instead of shipping. The five on that list are
inline surfaces (a form field's error line, a setup banner) and are deferred
with the ~60 backend routes whose details they print.
**The Plex "Add to playlist" dialog was still silent.** Same shape as the
collection editor round 5 fixed and the YouTube twin that already had the fix:
no catch, so a playlist deleted on another device answered a structured 404 that
nothing reported — the tick never flipped, the gone row stayed, and the floating
promise became an unhandled rejection.
Also: the `ABORTED` sentinel's VALUE was asserted nowhere. The consumer test
hand-built the error it expected, so replacing `xhr.onabort`'s rejection with a
friendlier message left the lane green — and every upload the user cancels would
then raise a red "the upload failed" toast, which is what the sentinel prevents.
Both producer tests assert through `isAborted` now.
And two backend tests were pinning fewer sites than their own docstrings claimed:
the channel-404 loop said "all five" and issued three requests (explore and
subscribe unexercised, the excuse for subscribe naming a different call site
with a different reason slug), and the recipient/job test named three refusals
and requested two — `share_download`'s `not_found("recipient")` had no test in
the suite at all, nor did the locale keys added beside it. Every site named now
has a request behind it.
6 tests, mutation-checked against 7 mutations: the demo detail at both the gate
and an auth route, a re-hand-rolled ChatThread, the silent Plex dialog, the
abort sentinel, and each unpinned 404 — all red on the test that names them.
Deep-review round 5, over round 4's own fixes.
- `notifyActionError` preferred the server's `detail` over the caller's translated fallback, and
`reportFailure` deliberately leaves 403/404/429 to the caller — so for exactly those statuses the
dozen call sites round 4 converted started printing whatever English a route hand-wrote into an
otherwise Hungarian UI ("No user with that email.", "Not subscribed to this channel", "Unknown
job"). A STRUCTURED detail is still preferred: `req` has already run it through `localizeDetail`,
so it is both localized and more specific. A plain string is not.
- The other half of the same defect, on the backend: round 4's `get_or_404(what="channel")` sweep
reached exactly ONE of the five identical sites in channels.py and shipped the HU/EN string with
it, so the Block button said it in Hungarian and the four controls beside it in English. All five
are converted, and the subscription / share-recipient / scheduler-job 404s with them (two new
reasons in both locales).
- `PlexCollectionEditor`'s add/remove, take-over and delete were try/finally with no catch — in the
very file round 4 edited to give `createNew` one. 403 and 404 are the caller's to report, so the
tick simply never appeared and a CONFIRMED "delete collection" did nothing, silently.
- `UploadDialog` is the only `uploadReq` caller and kept an empty catch whose comment still claimed
the global error modal had it. It had not since `reportFailure` became shared: a proxy 502 raised
only the self-clearing connection notice and a 413/403/404 nothing at all, so the dialog snapped
back to its pre-upload state with no error named. The user's own Cancel stays silent — and since
a cancel and a network drop both carry status 0, that difference is now a named `isAborted`
rather than a string literal at each end.
Regression tests for each (5 vitest, 2 pytest, plus two existing assertions corrected), all
mutation-checked: 6 mutations, each red on the assertion it is named after. vitest 1007,
pytest 1127.
Deep-review round 4, the "one report per failure" contract round 3 introduced.
- `req` marked gateway (502/503/504) and network failures "already reported" because they raise
the connection notice. But that notice is about connectivity and removes itself on the very next
answer — which every caller's own resync refetch fetches at once — so a delete that hit a
keepalive reset flashed the notice and was then reported nowhere, the list still there. Only the
durable reports (the error dialog, the 401 sign-out) count now; the caller says the action failed.
- A connection notice the user closed swallowed every later one for the rest of the visit; it is
raised again.
- `req` and `uploadReq` share one failure policy (`reportFailure`). The upload copy had drifted: a
502 opened the blocking "Server error (502)" dialog and cleared a notice that was still true.
- A taken Plex collection name is a structured 409, localized, and the create/rename calls are
quiet: it was an English dialog plus a Hungarian toast. `notifyCollectionEditError` is gone.
- The mutation onErrors that toasted unconditionally after a non-quiet request (invite approve /
deny / add, demo whitelist, audit clear, scheduler, share, full history, edit, config tests, tag
attach) go through `notifyActionError`; the playlist delete's hand-rolled copy of it too (it takes
a level now). The user role / suspend / delete actions had no onError at all: a user deleted in
another tab failed silently and stayed listed — now said, and the list refetched.
Deep-review round 3 of bug hunt 2026-09.
- get_or_404 / owned_or_404 answer a structured {code: "not_found", reason: <what>}
(errors.notFound.* in HU+EN, generic fallback). The structured-404 fix of round 2 had gone into the
ad-hoc `_own_playlist` (CLAUDE.md's "Not" pattern) while the shared helpers stayed string-only, so
views, tags, pins, Plex playlists, invites and users still 404'd in English. `_own_playlist` now
goes through owned_or_404; admin's hand-rolled user lookups use get_or_404.
- A move into a list that is gone names the TARGET (reason "move_target") — "this playlist doesn't
exist any more" was read as the list on screen, which still exists.
- Every refusal in the playlists router is a {code: "playlist", reason} (playlists.errors.* HU+EN)
instead of a bare English string shown verbatim in the Hungarian UI.
- `req` / `uploadReq` mark the errors they already put on screen (the error dialog, the connection
notice, the 401 sign-out), and notifyActionError skips those. The watched toggles, the saved views
and a playlist delete toasted a fault the dialog was already showing; Playlists' two hand-written
status filters now go through the same check.
Backend: create-collection happy path (write-through + editable) and the
create resync-failure 422 (honest reconcile detail), mirroring the rename/remove
tests. Frontend: extract notifyCollectionEditError (the 409->nameTaken vs
generic-fallback mapping that was inline in the New-collection create()) and
unit-test it; wire create() through it.
peter