bb8946b79b
Add a VisualAnnotationPanel letting users mark regions on an image (brush, circle, rectangle, cross) with per-mark edit instructions, composited into an annotation guide image. The new "visual-annotation" node action sends the unmarked source plus the annotated guide to the image model, editing only numbered regions. Server validates the annotation image/instructions and threads them through the generator task. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>