chore: support Qt 6.4 build

headers tweak

examples/dlog-example/main.cpp

@@ -4,6 +4,8 @@
 
 #include <DLog>
 #include <QCoreApplication>
+#include <QTimer>
+
 DCORE_USE_NAMESPACE
 
 int main(int argc, char **argv)

include/log/LogManager.h

@@ -6,7 +6,7 @@
 #ifndef LOGMANAGER_H
 #define LOGMANAGER_H
 
-#include <QtCore>
+#include <QScopedPointer>
 
 #include "dtkcore_global.h"
 

src/log/LogManager.cpp

@@ -2,6 +2,7 @@
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 
+#include <QtCore>
 #include "LogManager.h"
 #include <Logger.h>
 #include <ConsoleAppender.h>