fix(ui): cap now playing cards at eighty percent

Apply one shared runway fraction to the SongCard in New, Classic, Large, and Small modes while preserving each mode's alignment.

cx

crates/qbz-qt/qml/shell/NowPlayingBarSmall.qml

@@ -312,15 +312,16 @@ Rectangle {
                     // shell's ArtPreviewOverlay was simply never armed in
                     // Small). Rule 5 — reuse, don't fork.
                     //
-                    // Width = the column minus the Sep + time column, so the
+                    // The live runway is the column minus Sep + time; the
-                    // title and the meta budget elide at exactly the free
+                    // shared 80% cap keeps this mode consistent with the three
-                    // space. Height = the 39px controls row: BOTH must be
+                    // full bars. Height = the 39px controls row: BOTH must be
                     // explicit, because SongCard's own defaults are 200x74 and
                     // a 74px card would push the 37px cover off-centre.
                     SongCard {
                         height: parent.height
-                        width: Math.max(0,
+                        readonly property real availableWidth: Math.max(0,
                             parent.width - (QbzPlayer.npHasTrack ? 59 : 0))
+                        width: availableWidth * theme.npbSongCardMaxFraction
                         artSize: 37
                         artBorderWidth: 3
                         artBorderColor: theme.surfaceCard

crates/qbz-qt/qml/shell/PlayerBar.qml

@@ -426,8 +426,9 @@ Rectangle {
                 SongCard {
                     visible: !root.isClassic
                     x: root.largeActive ? root.dockWidth + 8 : 0
-                    width: Math.max(0,
+                    readonly property real availableWidth: Math.max(0,
                         controlsLayout.transportLeft - 10 - leftZone.x - x)
+                    width: availableWidth * theme.npbSongCardMaxFraction
                     anchors.verticalCenter: parent.verticalCenter
                     showArt: !root.largeActive
                     showBadges: !root.largeActive
@@ -653,8 +654,8 @@ Rectangle {
             }
 
             // Classic lives between the REAL left transport and right action
-            // cluster. It may use at most 85% of that live gap, centred: the
+            // cluster. It may use at most 80% of that live gap, centred: the
-            // remaining 7.5% on each side keeps both the cover edge and the
+            // remaining 10% on each side keeps both the cover edge and the
             // in-card AudioStamp visibly detached from their neighbour controls.
             // Unlike the old fixed 560px cap this still scales with volume
             // steppers, remote state and the actual window width.
@@ -664,7 +665,7 @@ Rectangle {
                 readonly property real availableWidth: Math.max(0,
                     controlsLayout.rightControlsLeft
                         - controlsLayout.classicTransportRight)
-                width: availableWidth * 0.85
+                width: availableWidth * theme.npbSongCardMaxFraction
                 x: controlsLayout.classicTransportRight
                     + (availableWidth - width) / 2
                 anchors.verticalCenter: parent.verticalCenter

crates/qbz-qt/qml/theme/QbzTheme.qml

@@ -422,6 +422,10 @@ QtObject {
     // window width entirely, so folding it in would misrepresent the rule.
     readonly property int npbBreakMid: 1366
     readonly property int npbBreakWide: 1920
+    // Owner visual ruling (2026-08-23): the metadata card may consume at most
+    // 80% of its live runway in every NPB mode. One token keeps New, Classic,
+    // Large and Small from drifting back to four different proportions.
+    readonly property real npbSongCardMaxFraction: 0.80
     // `w` is the BAR's width, which is the window's width: both bars are
     // anchored left-to-right on the shell root (AppShell.qml:72-80), NOT
     // inset by the sidebar or the queue column (those anchor to npb.top).