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/shell/QconnectFlyout.qml

@@ -7,10 +7,11 @@
 //
 // STRUCTURE + BEHAVIOR are 1:1 with the Slint; geometry follows this port's
 // own popup conventions (controls/QbzContextMenu.qml): a Popup parented to
-// the Overlay, opened below-right of the trigger and clamped into the window
-// with an 8px margin — the same placement ViewModeMenu / AudioSettingsMenu
-// use from the same bars. Slint's fixed 280x244 panel, 14px padding and 12px
-// block spacing are kept.
+// the Overlay, opened above the bottom-bar trigger with right edges aligned
+// and clamped into the window with an 8px margin. The original 280x244 panel
+// grows vertically only
+// for the persisted playback-conflict policy added to this live Qt surface;
+// its 14px padding and 12px block spacing are kept.
 //
 // STATE: all session data is push-driven off the QbzQConnect singleton
 // (src/qconnect_bridge.rs) — `devicesJson` is parsed here exactly like
@@ -36,7 +37,7 @@ Popup {
 
     parent: Overlay.overlay
     width: 280
-    height: 244
+    height: 310
     padding: 14
     closePolicy: Popup.CloseOnPressOutside | Popup.CloseOnEscape
 
@@ -58,6 +59,13 @@ Popup {
         }
     }
 
+    readonly property var conflictPolicyOptions: [
+        QbzSession.tr("Ask every time", QbzSession.trRev),
+        QbzSession.tr("Continue on the active renderer", QbzSession.trRev),
+        QbzSession.tr("Continue here with the Qobuz Connect queue", QbzSession.trRev),
+        QbzSession.tr("Continue local playback and replace the Qobuz Connect queue", QbzSession.trRev)
+    ]
+
     // Discovery timer — bounds the spinner so the "no devices" empty state
     // shows if none appear within ~8s (Slint :486-493). Started on a Connect
     // click; stopped on disconnect. Single-shot, so triggering self-stops.
@@ -67,9 +75,9 @@ Popup {
         onTriggered: root.qcConnecting = false
     }
 
-    // Placement — byte-for-byte the QbzContextMenu convention: below the
-    // trigger, right edges aligned, clamped 8px into the window. From the
-    // bottom bar the y clamp is what lifts the panel into view.
+    // Bottom-bar placement: explicitly above the trigger, right edges
+    // aligned, then clamped 8px into the window. Computing the upward anchor
+    // before clamping prevents the panel from covering its own button.
     function _place(gx, gy, win) {
         if (win) {
             x = Math.max(8, Math.min(gx, win.width - width - 8))
@@ -81,8 +89,8 @@ Popup {
         open()
     }
 
-    function openBelowRight(sourceItem) {
-        var g = sourceItem.mapToItem(null, sourceItem.width - width, sourceItem.height + 4)
+    function openAboveRight(sourceItem) {
+        var g = sourceItem.mapToItem(null, sourceItem.width - width, -height - 4)
         _place(g.x, g.y, sourceItem.Window.window)
     }
 
@@ -211,13 +219,44 @@ Popup {
             }
         }
 
+        Column {
+            id: conflictPolicy
+            anchors.left: parent.left
+            anchors.right: parent.right
+            anchors.bottom: connectBtn.top
+            anchors.bottomMargin: 12
+            spacing: 5
+
+            Text {
+                width: parent.width
+                text: QbzSession.tr("When playback conflicts", QbzSession.trRev)
+                color: theme.textSecondary
+                font.pixelSize: 11
+                font.weight: theme.weightMedium
+                elide: Text.ElideRight
+            }
+
+            QbzSelect {
+                width: parent.width
+                menuWidth: parent.width
+                popupWidth: 420
+                sm: true
+                popupPlacement: "left"
+                options: root.conflictPolicyOptions
+                currentIndex: QbzQConnect.playbackConflictPolicyIndex
+                onSelected: function (i) {
+                    QbzBridge.settingsSelect("qconnect-conflict-policy", i)
+                }
+            }
+        }
+
         // Device list / empty state — the Slint's vertical-stretch block
         // (:495-602): surface-elevated, Radius.sm, clipped.
         Rectangle {
             id: listBox
             anchors.top: topCol.bottom
             anchors.topMargin: 12
-            anchors.bottom: connectBtn.top
+            anchors.bottom: conflictPolicy.top
             anchors.bottomMargin: 12
             anchors.left: parent.left
             anchors.right: parent.right