fix(qconnect): harden queue ownership handoffs

Preserve local playback when it is authoritative, make renderer conflicts explicit and persist the selected policy. Filter unsupported queue rows, restore portable Qobuz identities after disconnect, and fence takeover commands to avoid stale queue and playback loops.

cx

crates/qbz-qt/qml/controls/QbzSelect.qml

@@ -18,6 +18,10 @@ Rectangle {
     property int currentIndex: 0
     property int menuWidth: 240
     property int popupWidth: 0
+    // The default keeps the standard dropdown below the field. Flyouts near a
+    // window edge may opt into a lateral list without changing every other
+    // QbzSelect instance. Supported values: "below" and "left".
+    property string popupPlacement: "below"
     property bool enabled: true
     property bool searchable: false
     // Bootstrap-style small variant (QbzSelect.slint:74-76). The default is the
@@ -131,7 +135,7 @@ Rectangle {
             }
         }
         QbzIcon {
-            name: "chevron-down"
+            name: selectRoot.popupPlacement === "left" ? "chevron-left" : "chevron-down"
             width: selectRoot.sm ? 14 : 16
             height: selectRoot.sm ? 14 : 16
             anchors.verticalCenter: parent.verticalCenter
@@ -153,9 +157,15 @@ Rectangle {
     Popup {
         id: popup
         parent: selectRoot
-        // Right-anchored: a list wider than the control grows leftward.
-        x: selectRoot.width - selectRoot.listWidth
-        y: selectRoot.height + 4
+        // Standard selects grow down and left-align their right edge. A
+        // right-edge flyout may place the list beside the field instead; its
+        // bottom edge stays aligned so it cannot fall into the player bar.
+        x: selectRoot.popupPlacement === "left"
+            ? -selectRoot.listWidth - 4
+            : selectRoot.width - selectRoot.listWidth
+        y: selectRoot.popupPlacement === "left"
+            ? selectRoot.height - popup.height
+            : selectRoot.height + 4
         width: selectRoot.listWidth
         height: selectRoot.searchHeight + Math.min(listContent.contentHeight, selectRoot.maxListHeight) + 10
         padding: 0