tray: add debug logging for visibility chain

shell/modules/TrayModule.qml

@@ -15,6 +15,24 @@ RowLayout {
     required property var bar
     property var _activeMenu: null
 
+    Component.onCompleted: console.log("[TrayModule] created, enable:", S.Modules.tray.enable, "repeater count:", _trayRepeater.count)
+
+    onVisibleChanged: console.log("[TrayModule] visible:", visible, "enable:", S.Modules.tray.enable, "count:", _trayRepeater.count)
+
+    Connections {
+        target: _trayRepeater
+        function onCountChanged() {
+            console.log("[TrayModule] repeater count:", _trayRepeater.count);
+        }
+    }
+
+    Connections {
+        target: SystemTray.items
+        function onValuesChanged() {
+            console.log("[TrayModule] model valuesChanged, values.length:", SystemTray.items.values.length, "repeater count:", _trayRepeater.count);
+        }
+    }
+
     Repeater {
         id: _trayRepeater
         model: SystemTray.items