fix: protocol error caused by frequent creation and destruction of WaylandOutput.

Use a Timer to delay the destruction of WaylandOutpt to avoid
frequent creation and destruction of WaylandOutput causing protocol errors

log: as title
pms: BUG-292367

Author: tsic404

panels/dock/tray/SurfacePopup.qml

@@ -72,8 +72,18 @@ Item {
                 menu.close()
             }
         }
+
+        onMenuVisibleChanged: {
+            if (menuVisible) {
+                subMenuLoader.active = true
+            } else {
+                subMenuLoaderDelayTimer.start()
+            }
+        }
+
         Loader {
-            active: menu.menuVisible
+            id: subMenuLoader
+            active: false
             sourceComponent: SurfaceSubPopup {
                 objectName: "stashed's subPopup"
                 transientParent: menuWindow
@@ -83,6 +93,17 @@ Item {
                     return true
                 }
             }
+
+            // Avoid protocol errors caused by d
+            Timer {
+                id: subMenuLoaderDelayTimer
+                interval: 1000
+                repeat: false
+                running: false
+                onTriggered: function () {
+                    subMenuLoader.active = false
+                }
+            }
         }
     }
 

panels/dock/tray/TrayItemSurfacePopup.qml

@@ -55,6 +55,14 @@ Item {
         menuX: DockPositioner.x
         menuY: DockPositioner.y
 
+        onMenuVisibleChanged: {
+            if (menuVisible) {
+                subMenuLoader.active = true
+            } else {
+                subMenuLoaderDelayTimer.start()
+            }
+        }
+
         Item {
             anchors.fill: parent
             ShellSurfaceItemProxy {
@@ -65,8 +73,20 @@ Item {
                     popupMenu.close()
                 }
             }
+
+            // Avoid protocol errors caused by frequent creation and destruction of WaylandOutput.
+            Timer {
+                id: subMenuLoaderDelayTimer
+                interval: 1000
+                repeat: false
+                running: false
+                onTriggered: function () {
+                    subMenuLoader.active = false
+                }
+            }
             Loader {
-                active: popupMenu.menuVisible
+                id: subMenuLoader
+                active: false
                 sourceComponent: SurfaceSubPopup {
                     objectName: "tray's subPopup"
                     transientParent: popupMenu.menuWindow