fix(navigation): restore routed view state

Persist view-owned search, sort, filter and tab state alongside scroll positions across back and forward navigation.

cx

crates/qbz-qt/qml/settings/AppearanceSettings.qml

@@ -309,7 +309,7 @@ Column {
     }
     SettingRow {
         label: QbzSession.tr("Click on menu item navigates to first tab", QbzSession.trRev)
-        description: QbzSession.tr("Clicking a section in the sidebar or title bar opens it on its first tab — Discover on Home, Library on All — instead of only showing its menu", QbzSession.trRev)
+        description: QbzSession.tr("Clicking a section in the sidebar or title bar opens its first tab — including your chosen Local Library default — instead of only showing its menu", QbzSession.trRev)
         QbzToggle {
             checked: root.doc.navClickFirstTab === true
             onToggled: function (v) { QbzBridge.settingsBool("nav-click-first-tab", v) }