Smart Book Marking
This page is the smart-book companion surface. It already understands QR-linked puzzle metadata and can mark structured attempts reliably. Photo upload is wired in as the next milestone so the same page becomes the marking endpoint for camera captures, flatbed scans, and later a mobile app.
Use this from a phone camera or desktop upload. The recognition beta now rectifies clean uploads from corner fiducials before reading the answer slots, so it can handle more than perfectly aligned worksheet images. Messier phone photos and handwriting are the next step.