Initial qt-tests tray app with split amd64/arm64 AppImage CI workflows

src/main.cpp

@@ -0,0 +1,39 @@
+#include <QAction>
+#include <QApplication>
+#include <QMainWindow>
+#include <QMenu>
+#include <QSystemTrayIcon>
+#include <QVBoxLayout>
+#include <QLabel>
+
+int main(int argc, char *argv[]) {
+    QApplication app(argc, argv);
+    app.setApplicationName("qt_tray_demo");
+
+    QMainWindow window;
+    window.setWindowTitle("Qt Tray Demo");
+    auto *central = new QWidget();
+    auto *layout = new QVBoxLayout(central);
+    layout->addWidget(new QLabel("Qt test app window (tray + window)."));
+    layout->addWidget(new QLabel("Close hides to tray; use tray menu to quit."));
+    window.setCentralWidget(central);
+    window.resize(720, 420);
+
+    auto *tray = new QSystemTrayIcon(QIcon::fromTheme("applications-system"), &app);
+    auto *menu = new QMenu();
+    QAction *showAction = menu->addAction("Show Window");
+    QAction *quitAction = menu->addAction("Quit");
+    QObject::connect(showAction, &QAction::triggered, [&window]() {
+        window.show();
+        window.raise();
+        window.activateWindow();
+    });
+    QObject::connect(quitAction, &QAction::triggered, &app, &QApplication::quit);
+    tray->setContextMenu(menu);
+    tray->setToolTip("Qt Tray Demo");
+    tray->show();
+
+    QObject::connect(&window, &QMainWindow::windowTitleChanged, [](){});
+    window.show();
+    return app.exec();
+}