The Select and Mask dialog had no preview of the refined selection. It now
previews live in Photoshop's view modes: Onion Skin (default), Marching
Ants, Overlay, On Black, On White, Black & White and On Layers, with a
per-view Opacity, Show Edge (J) and Show Original (P). F cycles the views,
O/M/V/A/T/K/Y pick one and holding X shows the image without a view.
The view state lives in the dialog's fields, so ui.dialog.set drives it.
The preview runs select.refineEdge on the proxy with output=selection and
builds the view from it (veil fill layers, a layer mask, or the refined
selection, whose marching ants the canvas draws scaled back up), through
the existing filter-preview worker.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
