receipts.py renders store_logo (img) above the title; store_logo added to sales
settings (get/save) + a Logo URL field in POS Settings. Logo hosted at
site/receipt-logo.webp (Monster Robot, from WowPlatter receipt_templates). Print
window now waits for window.onload so the logo prints. Deploy via /opt/recordgod/deploy.sh.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>