fix: improve focus handling after expand/collapse in NotifyView

Added retry timer mechanism to reliably set focus after expand/collapse operations.

Log: improve focus handling after expand/collapse in NotifyView
pms: BUG-339891

Author: wyu71

panels/notification/center/NotifyView.qml

@@ -61,12 +61,41 @@ Control {
         activeFocusOnTab: false
         ScrollBar.vertical: ScrollBar { }
         property int nextIndex: -1
+        property int pendingFocusIndex: -1  // Index to focus after expand operation
         property bool panelShown: false
 
         // Forward signals from delegate to root for Tab cycling
         function gotoHeaderFirst() { root.gotoHeaderFirst() }
         function gotoHeaderLast() { root.gotoHeaderLast() }
 
+        // Request focus on item after expand with retry
+        function requestFocusOnExpand(idx) {
+            pendingFocusIndex = idx
+            currentIndex = idx
+            positionViewAtIndex(idx, ListView.Contain)
+            expandFocusTimer.retries = 15
+            expandFocusTimer.start()
+        }
+
+        Timer {
+            id: expandFocusTimer
+            property int retries: 15
+            interval: 50
+            repeat: true
+            onTriggered: {
+                let item = view.itemAtIndex(view.pendingFocusIndex)
+                if (item && item.enabled) {
+                    item.forceActiveFocus()
+                    view.pendingFocusIndex = -1
+                    stop()
+                } else if (retries <= 0) {
+                    view.pendingFocusIndex = -1
+                    stop()
+                }
+                retries--
+            }
+        }
+
         onNextIndexChanged: {
             if (nextIndex >= 0 && count > 0) {
                 currentIndex = nextIndex

panels/notification/center/NotifyViewDelegate.qml

@@ -80,7 +80,9 @@ DelegateChooser {
 
             onCollapse: function () {
                 console.log("collapse group", model.appName)
+                let collapseIndex = index
                 notifyModel.collapseApp(index)
+                root.view.requestFocusOnExpand(collapseIndex)
             }
 
             onSetting: function (pos) {
@@ -259,7 +261,7 @@ DelegateChooser {
                 console.log("expand")
                 let expandIndex = model.index
                 notifyModel.expandApp(expandIndex)
-                root.view.nextIndex = expandIndex + 1
+                root.view.requestFocusOnExpand(expandIndex + 1)
             }
             onSetting: function (pos) {
                 let tmp = mapToItem(root.view, pos)