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 122f2e7..33a2350 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -313,8 +313,7 @@ impl AppState {
         let depth = cce_ui::color::plate_bevel_width();
         pc.plate_spec(&cce_ui::scene::paint::PlateSpec {
             rect: card,
-            color: [0.013, 0.013, 0.017, 1.0],
-            blur: false,
+            material: cce_ui::scene::Material::opaque([0.013, 0.013, 0.017, 1.0]),
             window_corners: (true, true, true, true),
             depth,
         });