Adapt to QtConcurrent changes in Qt6

Accessing the QFuture result is no longer implicit, and run() changed
the argument order.

dataengines/activities/activityjob.cpp

@@ -33,7 +33,7 @@ void ActivityJob::start()
         if (name.isEmpty()) {
             name = i18n("unnamed");
         }
-        const QString activityId = m_activityController->addActivity(name);
+        const QString activityId = m_activityController->addActivity(name).result();
         setResult(activityId);
         return;
     }

klipper/clipboardjob.cpp

@@ -119,7 +119,11 @@ void ClipboardJob::start()
                 watcher->deleteLater();
                 delete code;
             });
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
             auto future = QtConcurrent::run(code, &Prison::AbstractBarcode::toImage, QSizeF(pixelWidth, pixelHeight));
+#else
+            auto future = QtConcurrent::run(&Prison::AbstractBarcode::toImage, code, QSizeF(pixelWidth, pixelHeight));
+#endif
             watcher->setFuture(future);
             return;
         } else {

klipper/klipper.cpp

@@ -349,7 +349,11 @@ void Klipper::loadSettings()
         m_saveFileTimer->setSingleShot(true);
         m_saveFileTimer->setInterval(5000);
         connect(m_saveFileTimer, &QTimer::timeout, this, [this] {
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
             QtConcurrent::run(this, &Klipper::saveHistory, false);
+#else
+            QtConcurrent::run(&Klipper::saveHistory, this, false);
+#endif
         });
         connect(m_history, &History::changed, m_saveFileTimer, static_cast<void (QTimer::*)()>(&QTimer::start));
     } else {