Downloads are now written to `filepath + '.tmp'` and atomically renamed
to the final path only on successful completion. Kiwix globs for `*.zim`
and ZimService filters `.endsWith('.zim')`, so `.tmp` files are invisible
to both during download. The same staging applies to `.pmtiles` map files.
Ref #372
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Corrupted ZIM files cause a native C++ abort (ZimFileFormatError) that
bypasses JS try/catch and kills the process. Add magic number validation
before passing files to @openzim/libzim so invalid files are skipped
gracefully. Also deduplicate Ollama download progress broadcasts — both
within a single stream (skip unchanged percentages) and across concurrent
callers (share one download promise per model).
Co-authored-by: aegisman <aegis@manicode.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Three bugs caused downloads to hang, disappear, or leave stuck spinners:
1. Wikipedia downloads that failed never updated the DB status from 'downloading',
leaving the spinner stuck forever. Now the worker's failed handler marks them as failed.
2. No stall detection on streaming downloads - if data stopped flowing mid-download,
the job hung indefinitely. Added a 5-minute stall timer that triggers retry.
3. Failed jobs were invisible to users since only waiting/active/delayed states were
queried. Now failed jobs appear with error indicators in the download list.
Closes#364, closes#216
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
