Clicking and window selection paired the cut-off program's codes as
rapid/cut at even positions. A head-locked far-edge segment carries lock
comments (and, cut from the far edge, a rapid return) between its cuts,
so no pair matched and the line could not be selected, though it drew.
CutOff.CutStrokes now walks the motions once for the renderer, click
hit test, window selection and the Sheet Cut-Off preview, so what is
selectable matches what is drawn.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The Windows run 38614147947 failed ActiveCutOffDragNeedsLeftMotionAndEndsAfterSelectionClears because a screen-space drag to world X=11 rounded to X=10.96. Assert bounded movement, then verify the released coordinate stays unchanged.