Closes the two F9 Libraries.razor parity gaps and normalizes scan-show error
mapping to ProblemDetails.
TASK 1 — library-wide deep scan:
- QueueLibraryScanByLibraryId gains optional `bool DeepScan = false`; handler
threads it into ForceSynchronize{Plex,Jellyfin,Emby}LibraryById.
- POST /api/libraries/{id}/scan?deep=false binds it via [FromQuery].
TASK 2 — external-collections scan (new endpoints):
- POST /api/media-sources/{plex|jellyfin|emby}/{id}/scan-collections?deep=false
acquires the per-source collections lock (§3b: lock IS the running scan → 409),
enqueues Synchronize{X}Collections(id, ForceScan:true, deep) to the scanner
channel, returns 202; compensating-unlock on enqueue throw.
TASK 3 — scan-show normalization:
- New QueueShowScanResult enum; handler returns it instead of bool.
- POST /api/libraries/{id}/scan-show now maps 202/404/409/422 (all errors
ProblemDetails) instead of 200/404/400-anonymous-object.
- Updated the lone Blazor caller (TelevisionSeasonList.razor).
Tests: LibrariesController (scan deep=true, scan-show enum→status), the three
media-source controllers (scan-collections route/404/409/202/compensating-unlock),
and handler tests for both changed handlers (deep threading + show-scan outcomes).
Docs: api-conventions §3b exemplar + blazor-route-parity §5 F9 gate.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Scan queue handler now returns a QueueLibraryScanResult enum
(Queued|NotFound|SyncDisabled|AlreadyScanning) instead of a lying bool;
LibrariesController.ScanLibrary maps them to 202/404/422/409 with ProblemDetails.
Guard the lock->enqueue with the EnqueueWithTraktLock compensating-unlock pattern.
ScannerService now releases every library/collection lock in a finally so a handler
exception can't leak the lock. Plex "Shows" scheduler batch (one lock, two messages)
now has only the trailing SynchronizePlexNetworks carry the single release
(Unlock flag), mirroring the scheduler Trakt tail-token precedent.
Guard the other lock->enqueue producers (Create/UpdateLocalLibrary, UpdateTraktList)
with compensating unlock. SPA drops the PENDING_GRACE_TICKS heuristic now that the
POST reports 202/409/404/422 directly: 202 -> pending+poll, 409 -> reconcile (no
error toast), 404/422 -> surface error.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
timothyandClaude Opus 4.8