avoid depend on qGuiApp directly

xcbthread.h

@@ -0,0 +1,22 @@
+// SPDX-FileCopyrightText: 2024 UnionTech Software Technology Co., Ltd.
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include <QThread>
+#include <xcb/xcb.h>
+
+namespace tray {
+class XcbThread : public QThread {
+    Q_OBJECT
+public:
+    XcbThread(xcb_connection_t *connection, QObject *parent = nullptr);
+    ~XcbThread();
+
+    void run() override;
+
+private:
+    xcb_connection_t *m_connection;
+};
+}