Add system tray to status bar in convergence mode

Reintroduce StatusNotifierModel-based system tray icons, gated on
convergenceModeEnabled. Desktop apps (KDE Connect, nm-applet, etc.)
expose tray icons that were removed in 1914e9be as unusable on
phone screens.

The status bar wrapper is raised above the ActionDrawerOpenSurface
so tray icon MouseAreas receive click events while non-interactive
areas still fall through to the swipe handler.

TaskWidget.qml supports left-click (Activate), right-click
(ContextMenu), hover tooltip, and hides Passive/ApplicationStatus
items. The lockscreen SIGABRT guard (disableSystemTray) is restored
on the action drawer's StatusBar instance.

components/mobileshell/CMakeLists.txt

@@ -102,6 +102,7 @@ ecm_target_qml_sources(mobileshellplugin SOURCES
     qml/statusbar/indicators/VolumeIndicator.qml
     qml/statusbar/ClockText.qml
     qml/statusbar/StatusBar.qml
+    qml/statusbar/TaskWidget.qml
 
     qml/widgets/krunner/KRunnerScreen.qml
     qml/widgets/mediacontrols/BlurredBackground.qml

components/mobileshell/qml/actiondrawer/private/ContentContainer.qml

@@ -269,6 +269,9 @@ Item {
         showDropShadow: false
         showTime: root.actionDrawer.mode == MobileShell.ActionDrawer.Portrait
 
+        // Disable system tray on lockscreen to prevent SIGABRT
+        disableSystemTray: root.actionDrawer.restrictedPermissions
+
         opacity: brightnessPressedValue
     }
 

components/mobileshell/qml/statusbar/StatusBar.qml

@@ -46,6 +46,11 @@ Item {
      */
     property bool showTime: true
 
+    /**
+     * Whether to disable the system tray (e.g. on the lockscreen to prevent SIGABRT).
+     */
+    property bool disableSystemTray: false
+
     readonly property real textPixelSize: Math.round(11 * ShellSettings.Settings.statusBarScaleFactor)
     readonly property real smallerTextPixelSize: Math.round(9 * ShellSettings.Settings.statusBarScaleFactor)
     readonly property real elementSpacing: Math.round(Kirigami.Units.smallSpacing * 1.5)
@@ -153,6 +158,21 @@ Item {
                         implicitHeight: mainRow.rowHeight
                         Layout.preferredWidth: height
                     }
+
+                    // System tray icons (convergence mode only)
+                    Loader {
+                        id: statusNotifierSourceLoader
+                        active: ShellSettings.Settings.convergenceModeEnabled && !root.disableSystemTray
+                        sourceComponent: SystemTray.StatusNotifierModel {}
+                    }
+
+                    Repeater {
+                        id: statusNotifierRepeater
+                        model: statusNotifierSourceLoader.item
+                        delegate: TaskWidget {
+                            Layout.leftMargin: root.elementSpacing
+                        }
+                    }
                 }
             }
 

components/mobileshell/qml/statusbar/TaskWidget.qml

@@ -0,0 +1,57 @@
+/*
+ *   SPDX-FileCopyrightText: 2011 Marco Martin <mart@kde.org>
+ *
+ *   SPDX-License-Identifier: LGPL-2.0-or-later
+ */
+
+import QtQuick
+import QtQuick.Controls as Controls
+import org.kde.kirigami as Kirigami
+
+Item {
+    id: taskIcon
+    width: parent.height
+    height: width
+
+    // Hide ApplicationStatus and Passive items
+    opacity: (model.category !== "ApplicationStatus" && model.status !== "Passive") ? 1 : 0
+    onOpacityChanged: visible = opacity
+
+    Behavior on opacity {
+        NumberAnimation {
+            duration: Kirigami.Units.longDuration
+            easing.type: Easing.InOutQuad
+        }
+    }
+
+    Kirigami.Icon {
+        id: icon
+        source: model.iconName ? model.iconName : (model.icon ? model.icon : "")
+        width: Math.min(parent.width, parent.height)
+        height: width
+        anchors.centerIn: parent
+    }
+
+    Controls.ToolTip.text: model.toolTipTitle ? model.toolTipTitle : (model.title ? model.title : "")
+    Controls.ToolTip.visible: mouseArea.containsMouse && Controls.ToolTip.text !== ""
+    Controls.ToolTip.delay: Kirigami.Units.toolTipDelay
+
+    MouseArea {
+        id: mouseArea
+        anchors.fill: parent
+        hoverEnabled: true
+        acceptedButtons: Qt.LeftButton | Qt.RightButton
+
+        onClicked: (mouse) => {
+            if (!model.service) {
+                return;
+            }
+
+            var operationName = mouse.button === Qt.RightButton ? "ContextMenu" : "Activate";
+            var operation = model.service.operationDescription(operationName);
+            operation.x = taskIcon.mapToGlobal(0, 0).x;
+            operation.y = taskIcon.mapToGlobal(0, taskIcon.height).y;
+            model.service.startOperationCall(operation);
+        }
+    }
+}

containments/panel/qml/StatusPanel.qml

@@ -64,8 +64,12 @@ Item {
     }
 
     // Status bar component
+    // z: 1 so system tray icon MouseAreas inside StatusBar receive events
+    // before ActionDrawerOpenSurface (z: default). Non-interactive areas
+    // pass through to the swipe surface below.
     StatusBarWrapper {
         id: statusBarWrapper
+        z: 1
         anchors.fill: parent
 
         statusPanelHeight: MobileShell.Constants.topPanelHeight
@@ -116,6 +120,20 @@ Item {
         }
     }
 
+    // Keyboard shortcut to toggle action drawer (convergence mode)
+    Shortcut {
+        sequence: "Meta+A"
+        enabled: ShellSettings.Settings.convergenceModeEnabled
+        context: Qt.ApplicationShortcut
+        onActivated: {
+            if (drawer.actionDrawer.intendedToBeVisible) {
+                drawer.actionDrawer.close();
+            } else {
+                drawer.actionDrawer.open();
+            }
+        }
+    }
+
     // Swiping area for swipe-down drawer
     MobileShell.ActionDrawerOpenSurface {
         id: swipeArea