Each download URL is now retried up to 3 times with increasing delay
(1.5s, 3s) before falling back to the next candidate URL. Recoverable
errors (404, 403, 429, 5xx, timeout, network) trigger retries.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Fix extraction status display after restart (shows "Entpacken ausstehend" instead of stale status)
- Fix Start button to trigger pending extractions for already-downloaded packages
- Fix extraction resume when archives already cleaned (recognizes completed state from resume file)
- Reduce update download connection timeout from 8min to 30s per candidate for faster fallback
- Add logging for update download candidates and failures
- Show manual download URL on update failure
- Sequential extraction preserved (one package at a time via queue)
- Extraction properly cancelled on shutdown, resumes on restart
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
