Lightroom's Resize to Fit has two boxes: Dimensions (the larger number to
the long edge, whichever way round the photo is) and Width & Height (the
width limited to W and the height to H as the photo stands). LightCraft
had only the first, labelled "Width × Height". Add `ResizeMode::WidthHeight`,
`fit: widthHeight` beside `width` + `height` in app.export, the mode in the
Export dialog (the old one is now called Dimensions), and the docs.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011K1peyrh5MdZ6ttHkVq8Gh