After a route choice the node now keeps the image and shows a 'Run from here'
re-queue button instead of blanking. The last painted mask is remembered and
auto-re-stashed on each new pause (with a Clear control) so it is not lost
between runs. The preview image area now scales with the node width.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Ethanfel