Key fixes:
1. Add pagehide handler for reliable mobile saves
2. Add visibilitychange handler - refresh stats when tab becomes visible
3. Add cache: 'no-store' to all stats API calls to bypass browser cache
4. Mount service-worker.js in docker-compose (was using stale cached version)
This ensures:
- Mobile saves reliably when switching apps or closing
- Desktop fetches fresh data when tab becomes active
- Browser cache never serves stale API responses
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>