KvadrantMaterialButtonShape

The three Material components the adapter cannot reach by theming, given the shape they need.

The side-by-side picture is what put them on this list: under the adapter a Material text field and card come out square and unremarkable, while the button stays a pill and the switch and slider stay recognisably Material. Each is here for a measured reason rather than a suspicion — ButtonDefaults.shape is RoundedCornerShape(50%) from a token and never reads MaterialTheme.shapes, and a held Material Button does not change a pixel, so neither the theme's shape nor its indication arrives.

These are not Metro components. io.github.youndie.kvadrant.components.KvadrantButton and its neighbours are, and a new screen should use those. What these are for is the screen that already has a Material Slider in it and is not going to be rewritten this quarter.