GET /prompt_manager/images/thumbnails/plan counts what a run would do
(targets, fresh, remaining past the cap, source labels) and writes
nothing. POST /prompt_manager/jobs/thumbnails {mode, size, quality}
starts the "thumbnails" job: admission guarded, cancellable at a file
boundary, outcome groups generated / skipped / errors. size is the
longest edge (128-2048), quality the encoder, and rebuild writes fresh
previews again through the same atomic rename, so a failed file keeps
its old preview and originals are only read.
The legacy gallery stream now starts or attaches to the same job and
streams its unchanged frames. A client that goes away no longer stops
the work; the gallery's Cancel asks the server to cancel the job.
Vito Sansevero
d5bcae301b