PlateSpec carries a Material (cce-ui RFC material, step 2a)

The root plate is Material::opaque(<the same colour>); no frost, no change
on screen. cce-ui@8e63dad.

Co-Authored-By: Claude Fable 5.1 <[email protected]>

 src/main.rs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index db644f4..fd18eb1 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -375,8 +375,7 @@ impl cce_ui::engine::Application for SystemInterface {
             // plate's corners from the compositor's silhouette clip.
             pc.plate_spec(&cce_ui::scene::paint::PlateSpec {
                 rect: Rect { x: 0.0, y: 0.0, width, height },
-                color: plate,
-                blur: false,
+                material: cce_ui::scene::Material::opaque(plate),
                 window_corners: (true, true, true, true),
                 depth: cce_ui::layout::bevel_width(),
             });