Replaces the per-kind refresh/shuffle handlers with one generic
pair driven off the kind registry, in lockstep across both clients.
Server:
- systemPlaylistKind gains Singleton; RefreshableSystemKind(key)
exported. for_you/discover singleton; songs_like_artist not.
- New generic POST /api/playlists/system/{kind}/refresh and
GET /api/playlists/system/{kind}/shuffle ({kind} = raw
system_variant). Non-singleton/unknown kind → 404. Deleted
playlists_{foryou,discover}_refresh.go and the per-kind shuffle
wrappers; serveSystemPlaylistShuffle core kept.
- playlistRowView.refreshable: server-derived flag so clients show
the refresh affordance generically without hardcoding kinds.
Web (not drift-cached → uses the server flag):
- refreshSystem(variant) replaces refreshForYou/refreshDiscover;
systemShuffle drops the for_you→for-you mapping (raw variant).
- PlaylistCard + detail page gate the kebab/Refresh button on
playlist.refreshable; label is "Refresh {name}". Tests reworked;
obsolete refresh-foryou/discover api tests deleted.
Flutter (list tiles are drift-cache-sourced → derive, no migration):
- Playlist.refreshable getter = isSystem && variant !=
songs_like_artist (holds for all current + planned kinds).
- refreshSystem/systemShuffle use the raw variant; PlaylistCard +
detail screen gate kebab/Regenerate/source-tagging on refreshable
so songs_like_artist plays via get() (no by-kind endpoint).
Pure-plumbing refactor; CI verifies parity. Next (R3): the five
discovery mixes — each a candidate query + one registry entry.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Web half of Stage 3. System-playlist tile play now:
- calls the new GET /api/playlists/system/{variant}/shuffle endpoint
(rotation-aware order from the server) instead of getPlaylist;
plays the returned order AS-IS — no client Fisher-Yates, since
the server already ordered it. Supersedes #413's client shuffle
for system playlists specifically; user playlists keep getPlaylist
+ stored order.
- tags the queue with the system variant. The player store carries
_queueSource; the events dispatcher includes `source` on
play_started so the server advances that playlist's rotation.
User playlists are unchanged (getPlaylist, plain playQueue, no
source). Tests updated: For-You play hits systemShuffle (not
getPlaylist/refresh) and passes source:for_you; user play uses
getPlaylist + plain playQueue with no source.
Flutter half is blocked — the Flutter client has no play-event
reporting at all (no /api/events POST, no scrobble), so there's no
play_started to attach `source` to. Surfacing that as a separate
decision rather than silently scope-exploding #415.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Web client posts Intl.DateTimeFormat().resolvedOptions().timeZone to
PUT /api/me/timezone after every successful login, register, and
bootstrap when the locally-stored tz_last_sent_at is >7 days old.
Cadence tracked in localStorage keeps the server stateless on the
"is this stale?" check.
Failures swallowed: the server's UTC default + last-known value keep
the scheduler functioning until the next successful attempt. SSR-
safe via the typeof window guard.
For #392 Half B. Companion Flutter change in next commit.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Half of #369 — the auto-poll piece. Inbox deferred (separate task).
Both /requests (user) and /admin/requests (admin, 'approved' tab only)
now refetch every 12s while at least one row has status='approved'.
Stops automatically when all rows settle to pending/completed/rejected.
TanStack Query's default refetchIntervalInBackground=false handles
the visibility behavior — polling pauses when the tab is hidden and
resumes on focus.
Predicate hasInFlightRequest() is exported + tested so the polling
logic is auditable independent of TanStack Query's internals.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
After e8eff1b migrated playlists.ts from raw apiFetch to the api.*
wrapper, three test files mocked the wrong surface:
- playlists.test.ts: GET case asserted init.method === 'GET' but
api.get omits init.method entirely (fetch defaults to GET). Fall
back to 'GET' when init.method is undefined.
- playlists.refresh-discover.test.ts: re-mock ./client to expose
`api: { post: vi.fn() }` instead of `apiFetch`; assertions check
api.post call args.
- playlists.refresh-foryou.test.ts: same.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Drop 9 hand-rolled apiFetch calls with redundant Content-Type
headers + manual JSON.stringify. The api.* wrapper in client.ts
already handles both. Identical wire shape; existing tests cover
all endpoints.
Also makes api.del generic so DELETE endpoints with typed returns
(playlist track removal) can use the wrapper instead of raw
apiFetch. Default `T = null` preserves existing callers.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Mirrors the server-side extension of POST /api/admin/lidarr/test. The
integrations page consumes these in the next commit to pre-fill the
quality/metadata/root-folder dropdowns on first-time Lidarr setup.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Final task of PR2 DRY pass. Extracts the verbatim
`offset + items.length >= total` math repeated across 8
createInfiniteQuery sites into a single Page<T>-shape helper.
The task spec described a bare-array helper signature
(lastPage: T[], pageSize-based stop), but no call site in this
repo uses that shape — every paged endpoint returns a Page<T>
envelope. The helper is named pageGetNextPageParam and matches
the actual canonical shape so the 8 copies could collapse.
Migrated:
- likes.ts: 3 sites (TrackRef, AlbumRef, ArtistRef)
- albums.ts: 1 site (AlbumRef)
- queries.ts: 4 sites (artists + 3 search facets)
history.ts left alone — uses has_more/total, different shape.
Lands four of the U3 frontend surfaces. Splits T5 because the
dispatch covering everything in one shot crashed the runtime
mid-execution; this is the salvageable half.
- /settings gains three cards alongside Appearance: Profile
(display name + email), Password (current + new + confirm with
client-side mismatch check), API Token (display + copy +
regenerate-with-double-click-confirm). Server error codes map
to clear toasts.
- /forgot-password — public; takes an email and always shows the
success message regardless of whether the email is on file
(mirrors the server's no-enumeration posture).
- Login page gets a "Forgot password?" link below the existing
register link.
- API client functions for the four /me endpoints (changePassword,
updateProfile, getAPIToken, regenerateAPIToken), the SMTP admin
trio (getSMTPConfig, updateSMTPConfig, testSMTPConfig), and the
forgot/reset auth pair (forgotPassword, resetPassword).
Tests for these surfaces + /reset-password page + admin SMTP card
land in T5b (next follow-up).
Extends the U1 /admin/users page with the four U2 admin endpoints.
- "New user" button opens a modal: username, optional display
name, password + confirm, optional admin checkbox. Validates
password match client-side; surface server-side errors
(username_taken, username_invalid, password_too_short).
- Per-row "Delete" opens a confirm modal explaining the cascade
(plays, likes, sessions). Last-admin guard surfaces as a clear
toast if the server refuses.
- Per-row "Reset password" opens a small modal: new password +
confirm. Toast confirms success.
- Per-row "Enable / Disable auto-approve" toggles the
per-user flag (the #355 sub-feature surface). Inline button
state reflects the current value.
AdminUser type extended with auto_approve_requests; the badge
appears next to the admin badge when enabled.
Tests cover create-user submit, delete confirm flow, last-admin
toast on delete, reset-password submit, auto-approve toggle.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
New admin route /admin/users with two sections:
- Accounts — table of all users (username, optional display name,
admin badge, created_at). Per-row "Make admin" / "Remove admin"
button calls PUT /api/admin/users/{id}/admin. Last-admin guard
surfaces as a toast ("Can't remove the last admin — promote
someone else first").
- Invites — list of active invites with Copy + Revoke per row.
"Generate invite" button creates a 24h token. Operator shares
the token with the invitee, who enters it on /register.
AdminTabs gains a "Users" tab (5 tabs total). New typed client
functions in admin.ts (listUsers, updateUserAdmin, listInvites,
createInvite, deleteInvite) plus query factory functions
createAdminUsersQuery / createAdminInvitesQuery and query keys
qk.adminUsers / qk.adminInvites.
Tests cover: list rendering, admin badge, promote/demote actions,
last-admin guard toast, invite generation, revoke flow, empty states.
AdminTabs.test.ts updated to assert 5 tabs and Users active state.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Click on the For-You tile's play button now triggers a synchronous
refresh, then enqueues + auto-plays the freshly-built playlist.
Two-click-target tile pattern: tile BODY click still navigates to
the playlist detail page (existing behavior); the play button is
the new generate-and-play action.
Behavior is gated on playlist.system_variant === 'for_you' — every
other playlist (user, Discover, Songs-like-X) keeps the existing
"fetch detail, enqueue, play" flow. The atomic-replace BuildSystem-
Playlists creates a new playlist_id, so the play handler uses the
refresh response's id for the follow-up getPlaylist call rather
than the stale tile prop's id.
Empty-library response (playlist_id: null) is a no-op — clicking
play in a degenerate-empty library doesn't error, it just doesn't
start playback. Caches are invalidated post-refresh so the home
view re-fetches and the tile re-renders with the new id, avoiding
the corner case of a click-then-tile-body 404.
Tests cover the refresh-and-play happy path, the empty-library
no-op, and that non-For-You playlists keep the existing flow.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Operator can refresh their Discover playlist without waiting for
the next daily cron tick. Two surfaces, both gated on
system_variant === 'discover':
- Detail page header: "Refresh" button next to the cover art / meta.
- Home Playlists row tile kebab: "Refresh Discover" menu item.
Both call POST /api/playlists/system/discover/refresh, show a
confirmation toast, and invalidate the playlist + playlists queries
so the new content lands without a manual page reload.
Extends Playlist.system_variant union with 'discover'. Adds
refreshDiscover() typed client. Tests cover client behaviour
(success + empty-library) plus conditional rendering on both
surfaces.
POST /api/admin/cover-sources/research bumps cover_art_sources_meta.
current_version unconditionally; the next enrichment pass re-eligibles
every 'none' row. Existing positively-sourced rows are not affected —
the version-mismatch eligibility rule only kicks in for 'none'.
Admin Cover Art panel gains a "Re-search missing art" button that
calls the endpoint and shows a confirmation toast. Operator's escape
hatch when:
- They've added a Last.fm key and want to retry failed rows
immediately rather than waiting for the next scheduled scan.
- An upstream provider's catalog has updated (e.g. Deezer added a
back-catalog import).
- They want to verify a fix end-to-end before the next scheduled
scan fires.
SettingsService.BumpVersion (the unconditional version of T5's
BumpVersionIfProvidersChanged) is the single-call DB writer; both
endpoints route through it.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Adds ScanSchedule type, getScanSchedule / updateScanSchedule
against the new admin endpoints, createScanScheduleQuery (60s
staleTime; refetches on focus + after PATCH invalidation — no
polling).
New qk.scanSchedule() key follows the existing tuple pattern.
ScanScheduleUpdate uses optional fields so mode=off updates can
omit per-mode fields entirely (server normalizes anyway).
Vitest covers the GET path, PATCH with body, and the mode=off
minimal-body case.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Adds CoverProvider type + capability union, getCoverProviders /
updateCoverProvider / testCoverProvider against the three new admin
endpoints, plus createCoverProvidersQuery (60s staleTime; refetches
on focus + after mutations rather than polling — settings rarely
change in operator time).
New api.patch helper added to client.ts (the existing helpers were
get/post/put/del; PATCH was missing).
New qk.coverProviders() key follows the existing tuple pattern.
api_key_set: bool replaces echoing the credential. UpdateCoverProviderPatch
uses optional fields so the operator can change just enabled, just
key, or both atomically.
Vitest covers GET path, PATCH path with body, version_bumped
response, POST /test path with empty body, ok=false error response.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Adds an artist-art-enrich stage after cover-enrich in RunScan. The
stage drains EnrichArtistBatch with a configurable cap and the
operator's data_dir, persists processed/succeeded/failed tallies to
the scan_runs.artist_art_enrich jsonb column added in migration
0018.
The admin /admin Library Scan card grid expands from 3 to 4 columns
with the new "Artist art" card mirroring the cover-enrichment one
(Processed / Succeeded / Failed). The TS ScanStatus type gains an
optional artist_art_enrich field. The Go scanStatusResp gains the
matching ArtistArtEnrich json.RawMessage field.
cmd/minstrel/main.go (and admin scan-trigger handler) wire the new
RunScanConfig fields: ArtistEnrichCap reuses cfg.Library.CoverArtBackfillCap
for now (can be split if separate budgets are useful), DataDir is
cfg.Storage.DataDir.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Adds CoverageRollup type, getCoverageRollup() against
/api/admin/library/coverage, and createCoverageQuery() with the same
3s/30s pacing used by scan-status. New qk.coverage() key follows the
existing zero-arg tuple pattern. Vitest covers the GET path and the
empty-library zero-state plus the with_art + pending + settled = total
invariant.
Forward-fix from running the prior two commits in production. Backfill
on a real library exposed two further issues:
(1) gofmt -s flagged the column-aligned stubMeta methods in
mbids_test.go. Switched to the gofmt-canonical single-space form.
(2) Many albums failed to heal with SQLSTATE 23505 (unique constraint
albums_mbid_unique). Cause: the operator's library has duplicate
album rows in the DB — same MusicBrainz release, split into
multiple rows by the pre-MBID scanner because of subtle title or
artist disagreements between files. When backfill now correctly
extracts the MBID, two rows want to claim the same one and the
partial unique index rejects the second.
The conflict is correct DB behavior — we shouldn't have two rows
with the same MBID — but it's not a write failure to alarm the
operator about. Detect 23505 specifically:
- downgrade the log line from Warn to Info
- track these in a new BackfillMBIDsResult.Duplicates counter
(separate from Skipped, which retains its "no MBID in tag"
meaning)
- leave the duplicate row's mbid NULL; merging duplicates is a
separate (future) operator workflow
Same handling threaded through the scanner heal path so a regular
rescan doesn't generate the noise either.
JSON tally + admin UI gain a "Duplicates" line so the operator
can see how many duplicate rows their library carries.
Follow-up scope (separate task): a duplicate-album merge UX that
reparents the duplicate's tracks to the canonical row and deletes
the orphaned album row.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds getScanStatus/triggerScan helpers, createScanStatusQuery factory
(3s poll), qk.scanStatus(), and a Library Scan section on the admin
overview page with per-stage tallies and inline Run scan button.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Adds cover_art_source to AlbumRef, two admin API helpers (refetchAlbumCover,
refetchMissingCovers), a per-album retry button gated on is_admin in the album
detail page, and a bulk-refetch section in the admin overview.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Wire shapes mirror the server's snake_case envelope. URL helpers use
the existing apiFetch + ApiError surface so error codes (not_found,
not_authorized, bad_request, server_error) propagate via the same
copyForCode chain as everything else.
DELETE /api/admin/tracks/{id} with optional ?unmonitor=true. Returns
the typed envelope with optional cascaded album/artist ids and the
lidarr_unmonitor_failed flag (only set on Lidarr-side failure when
unmonitor was requested — the file + DB delete still succeeded).
Caller invalidates TanStack Query keys for any vanished entities.
Three admin pages had divergent inline error-code → user-copy switch
tables (with wording drift, including a stale "Settings → Integrations"
that should have been Admin). Consolidate into web/src/lib/styles/error-copy.json,
expose via web/src/lib/api/error-copy.ts (ERROR_COPY + copyForCode),
and refactor the three pages to import the helper.
Fixes the three-way drift; the only user-visible behavior change is
the quarantine page now correctly says "Admin → Integrations".
Sets up the JSON for the M7 Flutter client (#356) to consume the same
table.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
After Lidarr accepts a request the local reconciler imports albums and
tracks as they arrive — but until the request hit 'completed' the
operator had no way to see "is anything happening?" The /requests and
/admin/requests rows now surface a live progress line whenever the
request's matched entity has children in our library.
Backend:
- New CountAlbumsByArtist + CountTracksByArtist sqlc queries.
- requestView gains imported_album_count and imported_track_count.
- New fillProgress helper computes them from the matched entity:
- kind=artist → counts albums + tracks under matched_artist_id
- kind=album → counts tracks under matched_album_id
- kind=track → 1 once matched_track_id is set
N+1 in the list endpoints; acceptable at admin scale.
- handleListRequests, handleGetRequest, and handleListAdminRequests
populate the new fields on every response.
Frontend:
- LidarrRequest TS type extended with the two counters.
- Both the operator's /requests page and the admin /admin/requests
page render an accent-colored line under the row meta when at
least one counter is non-zero, e.g.:
Artist: "5 albums · 47 tracks ingested"
Album: "12 tracks ingested"
Track: "Track ingested"
- Updated test fixtures to include the new required fields.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Persists the operator's metadata-profile choice alongside quality
profile + root folder. Defaults to the first profile Lidarr returns
(usually 'Standard' on a vanilla install) so the common case is
zero-click; operators with custom profiles like 'Singles only' can pick
explicitly.
Backend:
- Migration 0013: adds nullable default_metadata_profile_id to
lidarr_config. Existing rows get NULL and the service falls back to
fetch-and-pick-first until they save.
- Updated lidarr_config queries + sqlc + lidarrconfig.Config + admin
view/put body to round-trip the new field.
- handlePutLidarrConfig requires it (along with QP and root folder)
when enabled=true — matches the existing missing_defaults gate.
- New GET /api/admin/lidarr/metadata-profiles handler + lidarr.Client
ListMetadataProfiles (GET /api/v1/metadataprofile, same shape as
the quality-profile endpoint).
- lidarrrequests.Approve prefers cfg.DefaultMetadataProfileID; falls
back to the fetch-list path only when 0 (back-compat for upgraders).
Frontend:
- LidarrConfig type + LidarrMetadataProfile type + qk.lidarrMetadataProfiles.
- listMetadataProfiles + createMetadataProfilesQuery client helpers.
- Integrations page: third <select> picker, auto-defaults to first
profile when the saved value is 0, sends the new field on save and
clears it on disconnect.
- Updated test fixtures + the duplicate 'Standard' option string in
the dropdown-populates assertion.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The "I can't approve a request, the toast just says unknown" bug was
four problems compounded:
1. Lidarr config let enabled=true save with default_quality_profile_id=0
and default_root_folder_path=''. Approve then sent invalid POST bodies
to Lidarr, which 5xx'd.
2. lidarr.client.post() discarded Lidarr's response body on error, so
we couldn't tell why Lidarr 5xx'd from server logs.
3. handleApproveRequest's error switch didn't map ErrServerError or
ErrLookupFailed — both fell through to a generic 500 server_error.
4. apiFetch only parsed {error: {code, message}} envelopes, but admin
endpoints write {error: 'code_string'}. Every admin error toast
rendered as 'unknown'.
Fixes:
- internal/lidarr/client.go: capture up to 512 bytes of Lidarr's response
body when it returns 4xx/5xx; include in the wrapped error so server
logs show what Lidarr actually said instead of just the status bucket.
- internal/lidarrrequests/service.go: new ErrDefaultsIncomplete fires
before the Lidarr call when QP=0 or root_folder=''. Stops the bad
POST entirely.
- internal/api/admin_requests.go: handleApproveRequest now maps
ErrDefaultsIncomplete -> 'lidarr_defaults_incomplete' (400),
ErrServerError -> 'lidarr_server_error' (502),
ErrLookupFailed -> 'lidarr_rejected' (502).
- internal/api/admin_lidarr.go: handlePutLidarrConfig now requires
QP + root folder to be set whenever enabled=true.
- web/src/lib/api/client.ts: apiFetch handles both error envelope shapes
so admin error codes propagate to toasts.
- web/src/routes/admin/integrations/+page.svelte: auto-default to the
first quality profile and first root folder Lidarr returns when the
operator hasn't picked one yet — saves a click for typical
one-profile/one-folder home setups.
- web/src/routes/admin/requests/+page.svelte: friendly toast copy for
the new error codes.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds sort_name/cover_url to ArtistRef, sort_title to AlbumRef (matching
backend Task 5 wire shape), HomePayload type, and qk.home/albumsAlpha/
artistTracks query keys. Updates existing test fixtures to satisfy the
new required fields.
Verified clean via 'npm run check' (0 errors, only pre-existing warnings).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
- qk.adminRequests defaults to status='all' when no filter is set; the unfiltered
endpoint returns every status, so caching it as 'pending' was a latent mismatch.
- 60s staleTime on lidarrConfig + myRequests — both are session-stable enough
that refetching on every consumer-page mount produced needless flicker.
T13 of the M5a Lidarr plan. Three new client modules wrap api.get/post/put/del
helpers and the existing TanStack Query qk namespace:
lidarr.ts - searchLidarr() + createLidarrSearchQuery()
requests.ts - createRequest, listMyRequests, getRequest, cancelRequest;
createMyRequestsQuery(); cancel goes through apiFetch
directly because the backend returns the cancelled row body
(api.del's return type is fixed to null).
admin.ts - getLidarrConfig, putLidarrConfig, testLidarrConnection,
listQualityProfiles, listRootFolders, listAdminRequests,
approveRequest, rejectRequest; query factories for each
read; quality profiles + root folders take an enabled prop
so the call site decides when Lidarr is configured.
Shared LidarrRequestStatus / LidarrRequestKind enums and request/config/
search-result shapes added to types.ts. Per-module helpers (CreateRequestParams)
stay in their module files. testLidarrConnection returns a discriminated union
({ok:true,version} | {ok:false,error}) and never throws on ok:false so the
SPA can render either branch.
qk extended with lidarrSearch, myRequests, lidarrConfig,
lidarrQualityProfiles, lidarrRootFolders, adminRequests.
Tests mirror likes.test.ts (vi.mock('./client')) and cover URL construction,
query-param encoding, body shapes, the not-ok testLidarrConnection branch,
and qk additions. 32 new tests, 217 total passing.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Adds api.put helper, ListenBrainz API module with query/mutation
helpers, a /settings route with token + enable/disable UI, and 5
tests. Adds Settings to the Shell nav.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
createLikedIdsQuery is the single source for heart-button state across
the app (track_ids/album_ids/artist_ids Sets). likeEntity / unlikeEntity
do optimistic setQueryData updates with rollback on error. Per-entity
infinite queries back the /library/liked sections.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
useEventsDispatcher subscribes to player.current/state via \$effect:
on first transition to playing for a new track, POSTs play_started
and caches the id; on track-id change while a play is open, closes
the prior row as play_skipped; on natural completion (state
playing→paused with position >= duration > 0), POSTs play_ended;
on pagehide, navigator.sendBeacon fires a final play_skipped.
Stable per-tab client_id from sessionStorage.
createSearchQuery hits /api/search with limit=10 (the main /search
page summary). createSearchArtistsInfiniteQuery /
createSearchAlbumsInfiniteQuery / createSearchTracksInfiniteQuery each
hit /api/search with limit=50 and project to their own facet, used by
the per-facet overflow pages. All four are gated by q.length > 0 so
empty queries don't fire.
qk.{artists,artist,album} key generators and create*Query wrappers
with shared page size, sort-aware keys, and infinite-query plumbing
for /api/artists.
vitest's toMatchObject doesn't accept a type parameter; tests passed
under vitest (esbuild transpile) but svelte-check rejected. Plan-spec
bug introduced in 4d1a7f8; fixing here so check is clean before Task 6.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Wraps fetch, parses JSON, and throws ApiError{code,message,status}
on non-2xx. Degrades to {code:'unknown'} when the error body is not
the expected envelope shape.
bvandeusen