fix(slint): tint AlbumCard cd-tier badge icon light

The cd.svg quality badge rendered black/transparent; switched the
Image to QbzIcon with a light tint so it matches the Tauri look.

cc

crates/qbz-slint/ui/primitives/QualityBadge.slint

@@ -7,6 +7,7 @@
 import { Theme } from "../foundation/semantic-colors.slint";
 import { Typography } from "../foundation/typography.slint";
 import { Radius } from "../foundation/radius.slint";
+import { QbzIcon } from "QbzIcon.slint";
 
 export component QualityBadge inherits Rectangle {
     // "hires" | "cd" | "" — empty hides the badge entirely.
@@ -33,13 +34,15 @@ export component QualityBadge inherits Rectangle {
         background: Theme.surface-elevated;
         border-width: 1px;
         border-color: Theme.border-subtle;
-        Image {
+        QbzIcon {
             x: (parent.width - self.width) / 2;
             y: (parent.height - self.height) / 2;
             width: 16px;
             height: 16px;
             source: @image-url("../assets/cd.svg");
             image-fit: contain;
+            // Tinted light, matching the Tauri CD badge.
+            tint: #b0b0b0;
         }
     }