Blocker: the "every file rejected" reset never fired because the backend
returns `upload_id` unconditionally (with count 0), so `anyQueued` was
always true and the completion effect (gated on total > 0) never ran —
modal spun forever. Gate `anyQueued` on `count > 0` so a zero-photo
response takes the terminal reset path.
Concern 1: processing-stage failures were invisible — the modal
auto-closed on clean transfer before the worker reported them. Defer the
settle/close decision to the completion effect (combining transfer +
processing failures), and persist failed photos into `processingFailures`
state before `uploadIds` is cleared, so the rows don't vanish the instant
they appear.
Also: report card gets role="status"/aria-live (nit), and tests now cover
the whole-chunk transfer failure, the clean-settle path, and the
onUploadSettled contract from the real component.
André Deuerling
1be871cb9a