fix(library): harden cross-source catalog data

Preserve per-disc and collection artwork, multi-value genres and remote metadata across Local, Plex, Jellyfin and Subsonic.

Apply source, format and quality filters before pagination, reject invalid CUE rows, and keep Qt library surfaces aligned with the selected physical version.

cx

crates/qbz-qt/qml/rows/TrackRow.qml

@@ -79,6 +79,7 @@ Rectangle {
     property var item: ({})
     property int number: 0
     property bool showArtwork: false
+    property bool showSource: false
     property bool showAlbum: false
     property bool showFavorite: true
     property bool showDownload: false
@@ -493,10 +494,11 @@ Rectangle {
     // The animated eq bars carry the playing state in the play cell when the
     // pref is ON (TrackPlayCell.slint:99-100 `show-bars`): only while this
     // row's track is actually PLAYING, at rest (hover reveals the pause
-    // affordance instead), and never in select mode. The bars tick on the
-    // shared shell pulse, so they cost ZERO extra presents (EqualizerBars
-    // rides QbzShell.pulseMs) — that is what makes the indicator affordable
-    // here, where a display-rate animation was not.
+    // affordance instead), and never in select mode. The Loader is part of
+    // the performance contract: an expanded multidisc album may contain
+    // hundreds of non-virtualized rows, and each eager EqualizerBars would
+    // otherwise receive the shared 30 Hz pulse even while hidden. Exactly
+    // one indicator exists: the active row while it is visible at rest.
     readonly property bool showBars: root.playIndicatorAnim
         && root.recycleActive && root.isActive && QbzPlayer.npPlaying && !root.hovered
         && !root.selectMode
@@ -559,7 +561,7 @@ Rectangle {
 
     readonly property int titleColWidth: cols.titleWidth(root.width,
         root.showArtwork, root.showAlbum, root.showFavorite,
-        root.showDownload, root.showMenu, root.showReorder)
+        root.showDownload, root.showMenu, root.showReorder, root.showSource)
 
     // Static now-playing mark: 3px accent pill on the left edge. With the
     // animation pref ON the eq bars in the play cell carry the state instead
@@ -671,12 +673,15 @@ Rectangle {
             readonly property bool accentRing: !root.playIndicatorAnim
                 && root.isActive && QbzPlayer.npPlaying
             // `show-bars` (TrackPlayCell.slint:184-187): the animated eq bars
-            // replace the disc at rest on the playing row. Pulse-driven, so
-            // they ride the shell's frame instead of owning one.
-            EqualizerBars {
-                visible: root.showBars
-                active: root.recycleActive && root.isActive && QbzPlayer.npPlaying
+            // replace the disc at rest on the playing row. The Loader avoids
+            // constructing a pulse receiver in every inactive track row.
+            Loader {
+                active: root.showBars
                 anchors.centerIn: parent
+                sourceComponent: EqualizerBars {
+                    active: true
+                    tint: theme.accent
+                }
             }
             // Selection checkbox — TrackRow.slint:392-419: a 13px disc, accent
             // when selected, muted/text-primary ring when not. It REPLACES the
@@ -845,6 +850,20 @@ Rectangle {
                 settleMs: root.artSettleMs
             }
         }
+        Item {
+            visible: root.showSource
+            width: cols.colSource
+            height: parent.height
+            SourceIcon {
+                anchors.centerIn: parent
+                kind: root.item.source || "qobuz"
+                mono: true
+                glyphSize: 15
+                plexSize: 16
+                qobuzSize: 16
+                localTint: "muted"
+            }
+        }
         // Title (+ explicit) / artist.
         Column {
             width: root.titleColWidth