Pattern Stamp (aligned through LiveRetouch, Impressionist dab by dab) and
Background Eraser now paint during the drag; the release commits exactly the
pixels the live stroke showed (per-pixel tests at 8 and 16 bits). Spot
Healing keeps healing on release and shows a dark overlay while dragging.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>