Turn a hand sketch into a 3D-printable pegboard

Detect the board outline and the hole grid from a photo (samples in the repo), correcting for perspective

Generate a solid with holes at the detected positions, standard pegboard spacing, configurable thickness

Export STL and 3MF; the mesh must be manifold — verify it in code

A preview render in the browser before download

Refuse gracefully when the sketch is not recognisable, with a hint

Hooks: detect small circles drawn next to holes and add matching hook models

Requirements