feat: add macOS notification handler and install event filter on main window

client/ui/ne_notificationhandler.h

@@ -0,0 +1,36 @@
+#ifndef NE_NOTIFICATION_HANDLER_H
+#define NE_NOTIFICATION_HANDLER_H
+
+#include "notificationhandler.h"
+#include <QMenu>
+#include <QAction>
+
+class MacOSStatusIcon;
+
+class NEStatusBarNotificationHandler : public NotificationHandler {
+    Q_OBJECT
+public:
+    explicit NEStatusBarNotificationHandler(QObject* parent);
+    ~NEStatusBarNotificationHandler() override;
+
+    void setConnectionState(Vpn::ConnectionState state) override;
+    void onTranslationsUpdated() override;
+
+protected:
+    void notify(Message type, const QString& title,
+                const QString& message, int timerMsec) override;
+
+private:
+    void buildMenu();
+
+    QMenu m_menu;
+    MacOSStatusIcon* m_statusIcon;
+
+    QAction* m_actionShow;
+    QAction* m_actionConnect;
+    QAction* m_actionDisconnect;
+    QAction* m_actionVisitWebsite;
+    QAction* m_actionQuit;
+};
+
+#endif // NE_NOTIFICATION_HANDLER_H