fix(slint): album description fills the band right of the artwork

The header description wrapped at its natural width and left the
space to the right unused. It now spans the full width to the page
edge (bound to root.width to avoid a layout binding loop), and the
truncation grew from 200 to 360 chars so the wider band reads full.

cc

crates/qbz-slint/ui/album/AlbumPageView.slint

@@ -426,6 +426,12 @@ export component AlbumPageView inherits Rectangle {
                     // with a Read more link to the full modal.
                     if AlbumState.description != "": Rectangle { height: 12px; }
                     if AlbumState.description != "": Text {
+                        // Explicit width so the text fills the whole band
+                        // to the right of the artwork instead of wrapping
+                        // narrow and leaving dead space. Bound to root.width
+                        // (not the parent layout) to avoid a binding loop:
+                        // page padding 32+32, artwork 224, header gap 32.
+                        width: root.width - 320px;
                         text: AlbumState.description-short;
                         color: Theme.text-secondary;
                         font-size: Typography.legal;