- Replace subprocess.run() with Popen for cancellable processes
- Add cancel() method to SneakyScanner with process termination
- Track running scanners in registry for stop signal delivery
- Handle ScanCancelledError to set scan status to 'cancelled'
- Add POST /api/scans/<id>/stop endpoint
- Add 'cancelled' as valid scan status
- Add Stop button to scans list and detail views
- Show cancelled status with warning badge in UI
- Add ScanProgress model and progress fields to Scan model
- Implement progress callback in scanner to report phase completion
- Update scan_job to write per-IP results to database during execution
- Add /api/scans/<id>/progress endpoint for progress polling
- Add progress section to scan detail page with live updates
- Progress table shows current phase, completion bar, and per-IP results
- Poll every 3 seconds during active scans
- Sort IPs numerically for proper ordering
- Add database migration for new tables/columns
- Save JSON/HTML/ZIP paths to database when scans complete
- Remove orphaned scan-config-id reference causing JS errors
- Add showAlert function to scan_detail.html and scans.html
- Increase notification z-index to 9999 for modal visibility
- Replace inline alert creation with consistent toast notifications
