feat: dual time zones, autostart, tray icon, config relocation, tests

- Dual clock (primary/secondary time zone) with IANA picker, persisted in XML
- AutoStartManager: macOS LaunchAgent (com.clouck.clock, RunAtLoad)
- Tray icon: template image, light/dark adaptation, toggle + quit menu
- ConfigManager: default path moved to QStandardPaths::AppConfigLocation
- Qt Test suite (ConfigManager, AutoStartManager) wired into CTest
- GitHub origin renamed to upstream; private Gitea repo as origin

main.cpp

@@ -1,6 +1,45 @@
 #include <QApplication>
+#include <QAction>
+#include <QMenu>
+#include <QPainter>
+#include <QStyleHints>
+#include <QSystemTrayIcon>
+#include "autostart_manager.h"
 #include "clock_widget.h"
 
+namespace
+{
+// Standard macOS menu bar icon extent (points). Matches surrounding icons.
+constexpr int trayIconExtent = 16;
+
+QIcon createTrayIcon(const QColor &color)
+{
+    QPixmap pixmap(trayIconExtent, trayIconExtent);
+    pixmap.setDevicePixelRatio(qApp->devicePixelRatio());
+    pixmap.fill(Qt::transparent);
+
+    QPainter painter(&pixmap);
+    painter.setRenderHint(QPainter::Antialiasing);
+    painter.setPen(QPen(color, 1.5));
+    painter.drawEllipse(QPointF(8, 8), 5.5, 5.5);
+    painter.drawLine(QPointF(8, 4.5), QPointF(8, 8));
+    painter.drawLine(QPointF(8, 8), QPointF(10.5, 9.5));
+
+    QIcon icon(pixmap);
+#ifdef Q_OS_MAC
+    // Template image: the system tints it black/white to match the
+    // active appearance, like native menu bar icons.
+    icon.setIsMask(true);
+#endif
+    return icon;
+}
+
+QColor trayIconColorForScheme(Qt::ColorScheme scheme)
+{
+    return scheme == Qt::ColorScheme::Dark ? QColor(Qt::white) : QColor(Qt::black);
+}
+}
+
 int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);
@@ -12,5 +51,46 @@ int main(int argc, char *argv[])
     ClockWidget clock;
     clock.show();
 
+    AutoStartManager::enableForCurrentApplication();
+
+    const QStyleHints *styleHints = app.styleHints();
+    QSystemTrayIcon trayIcon(createTrayIcon(trayIconColorForScheme(styleHints->colorScheme())), &app);
+    trayIcon.setToolTip("Clouck");
+
+    QObject::connect(styleHints, &QStyleHints::colorSchemeChanged, &trayIcon,
+                     [&trayIcon](Qt::ColorScheme scheme) {
+                         trayIcon.setIcon(createTrayIcon(trayIconColorForScheme(scheme)));
+                     });
+
+    QMenu trayMenu;
+    QAction *toggleClockAction = trayMenu.addAction("Turn Clock Off");
+    QAction *quitAction = trayMenu.addAction("Quit");
+
+    const auto toggleClock = [&clock, toggleClockAction]() {
+        if (clock.isVisible())
+        {
+            clock.hide();
+            toggleClockAction->setText("Turn Clock On");
+            return;
+        }
+
+        clock.show();
+        clock.raise();
+        toggleClockAction->setText("Turn Clock Off");
+    };
+
+    QObject::connect(toggleClockAction, &QAction::triggered, &app, toggleClock);
+    QObject::connect(quitAction, &QAction::triggered, &app, &QApplication::quit);
+    QObject::connect(&trayIcon, &QSystemTrayIcon::activated, &app,
+                     [toggleClock](QSystemTrayIcon::ActivationReason reason) {
+                         if (reason == QSystemTrayIcon::Trigger)
+                         {
+                             toggleClock();
+                         }
+                     });
+
+    trayIcon.setContextMenu(&trayMenu);
+    trayIcon.show();
+
     return app.exec();
 }