forked from 1b-agent/opencadstudio-upstream
The codec writes R2018 AuxHeader maintenance fields as RL, so AutoCAD no longer reads a 2018 save as student-made. The kernel drops zero-area spikes before triangulating, so a hatch whose boundary folds back on itself fills on screen instead of vanishing. Fixes #1564 Fixes #1569 Co-Authored-By: Claude Opus 5.5 <[email protected]>