- Add a native resolution COMBO (shipped sizes only) so a size can be picked
and saved in the workflow without the panel; custom or unparseable labels
fall back to width/height on both sides.
- Mirror the dropdown with the chips: options follow the active chip, the
value tracks the current size, and picking a label writes width/height.
- Draw a decorative ratio shape on each ratio chip and show the first
families warning in the status line.