barmodule: own hoverpanel internally, modules supply content as component

shell/modules/BarModule.qml

@@ -9,10 +9,9 @@ import "../services" as S
 // On tap: toggles _panelOpen and emits tapped(). Modules that want custom tap
 // behavior connect onTapped to their action (the toggle still happens).
 //
-// Modules with a HoverPanel bind:
-//   M.HoverPanel { showPanel: root._showPanel; onDismissed: root.dismissPanel() }
-//
-// Modules without a panel need nothing - the toggle is a harmless no-op.
+// Panel modules set panelComponent + panel config properties. BarModule owns the
+// HoverPanel internally - modules never interact with it directly.
+// For content resize grace, call keepPanelOpen(ms).
 Row {
     id: root
     property string tooltip: ""
@@ -25,6 +24,13 @@ Row {
     property bool _osdActive: false
     readonly property bool _showPanel: _panelOpen || _osdActive
 
+    // Panel configuration - set by modules that have applets
+    property Component panelComponent: null
+    property string panelTitle: ""
+    property string panelNamespace: "nova-panel"
+    property real panelContentWidth: 220
+    property Component titleActionsComponent: null
+
     signal tapped
 
     function flashPanel() {
@@ -38,6 +44,11 @@ Row {
         _osdTimer.stop();
     }
 
+    function keepPanelOpen(ms) {
+        if (_panelLoader.item)
+            _panelLoader.item.keepOpen(ms);
+    }
+
     Timer {
         id: _osdTimer
         interval: 1500
@@ -81,4 +92,27 @@ Row {
             duration: 150
         }
     }
+
+    // HoverPanel - only created when module provides panelComponent
+    LazyLoader {
+        id: _panelLoader
+        active: root.panelComponent !== null
+
+        M.HoverPanel {
+            showPanel: root._showPanel
+            screen: QsWindow.window?.screen ?? null
+            anchorItem: root
+            accentColor: root.accentColor
+            panelNamespace: root.panelNamespace
+            panelTitle: root.panelTitle
+            contentWidth: root.panelContentWidth
+            titleActionsComponent: root.titleActionsComponent
+            onDismissed: root.dismissPanel()
+
+            Loader {
+                width: root.panelContentWidth
+                sourceComponent: root.panelComponent
+            }
+        }
+    }
 }