Content Updates had three UX problems that compounded:
1. No size column, so users had to guess how big an update would be before
clicking Update All. Upstream /api/v1/resources/check-updates doesn't
return size, so CollectionUpdateService now enriches each update with
a Content-Length HEAD request in parallel (5s timeout, non-fatal on
failure — the row just renders an em-dash).
2. Small ZIM updates (1-8 MB) never appeared in Active Downloads. Two
causes, both fixed: handleApply / handleApplyAll didn't invalidate the
download-jobs query after dispatching, and useDownloads idled at 30s
between polls — enough for a fast job to dispatch, download, and get
cleaned up by removeOnComplete before the next refetch.
3. applyUpdate didn't forward title / totalBytes to RunDownloadJob, so
any update that did briefly surface in Active Downloads had no label
and no byte-count progress, just a filename and a percentage. It now
passes both (matching zim_service's dispatch pattern).
Also parallelized applyAllUpdates so dispatching five updates doesn't
serialize five sequential BullMQ round-trips.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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