The Crop options bar gets Photoshop's Straighten button (one-shot), and holding ⌘/Ctrl with the
Crop tool is a temporary Straighten. The drawn line (with an angle readout) turns the frame so the
line ends up level, or plumb when it is nearer vertical (the Ruler's straighten_angle convention),
and fits the frame to the largest of its proportions inside the image (Classic Mode). It is a
pending frame edit: Enter commits, Esc cancels. New logic lives in crop_straighten.rs.
Co-authored-by: Claude Opus 5.5 (1M context) <noreply@anthropic.com>