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/shell/ContentRouter.qml

@@ -575,6 +575,19 @@ Item {
         }
     }
 
+    // Opening ad-hoc media is a GLOBAL navigation action. The old listener
+    // lived only inside LocalLibraryView, so opening a folder/disc from
+    // Settings or another section completed successfully but left the user on
+    // the old page. The sequence changes only for an explicit user open (not
+    // boot rehydrate); navigateToTab avoids duplicate history when Local
+    // Library is already mounted and applies the tab after a fresh mount.
+    Connections {
+        target: QbzLocal
+        function onLocalEphemeralOpenSeqChanged() {
+            QbzShell.navigateToTab("local", "ephemeral")
+        }
+    }
+
     Binding {
         target: viewLoader.item
         property: "activeTab"