Generalize the grounded encode to N reference images (scene + subject):
both go through the vision tower with a per-image <vision> block, spliced
and deepstack-injected at their own token positions, with multi-image
get_rope_index. Validated vs full torch Qwen3-VL — two-image grounded tap
matches to cosine 1.0, mean|Δ| 3.1e-5 (single-image unchanged). generate_edit
now feeds both image + image_b through grounding when grounding_px > 0.
Fix a ZeroDivisionError in preprocess: max_pixels is now clamped so a tiny
grounding_px (e.g. from a stale workflow whose widgets predate the
grounding_px control) can't zero the area ceiling. The example edit
workflow gains the grounding_px widget so its values align with the node.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
