Problems fixed:
- Analysis no longer freezes (was sending all positions in one request)
- Now analyzes position-by-position with live progress updates
- Progress bar shows "تحليل النقلة 5 من 30" with fill animation
- Fallback: loads moves from moves[] array when PGN is empty
- Added 'cache' API action to save analysis results with service key
- Fixed curl handle leak (unset → proper handling)

Flow: click analyze → progress bar fills per move → results render → cached
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>