When a MASK is connected, it gets embedded as the alpha channel of the
saved PNG. LoadImage then automatically extracts it as its mask output.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Previews an image (like PreviewImage) and saves a copy to input/ so a
LoadImage node can reference it. JS extension adds a target-node-ID
widget and "Send to Load Image" button that updates the target's combo.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
