fix: Windows Server 2016 compatibility due to Qt6 upstream

Author: moeleak

.github/workflows/build.yml

@@ -37,7 +37,7 @@ jobs:
       - name: Install Qt
         uses: jurplel/install-qt-action@v3
         with:
-          version: "6.10.0"
+          version: "6.10.1"
           arch: win64_msvc2022_64
           modules: qt5compat qtshadertools
           cache: true

flake.lock

@@ -5,6 +5,7 @@
 
 #include <QCoreApplication>
 #include <QGuiApplication>
+#include <QOperatingSystemVersion>
 #include <QQmlApplicationEngine>
 #include <QQmlContext>
 #include <QQmlEngine>
@@ -15,6 +16,15 @@ int main(int argc, char *argv[]) {
   QCoreApplication::setOrganizationName(QStringLiteral("ConnectTool"));
   QCoreApplication::setApplicationName(QStringLiteral("ConnectTool"));
 
+#if defined(Q_OS_WIN)
+  if (const auto osVersion = QOperatingSystemVersion::current().version();
+      osVersion < QOperatingSystemVersion::Windows10_1809.version() &&
+      qEnvironmentVariableIsEmpty("QT_QPA_PLATFORM")) {
+    // Avoid missing text on Windows Server 2016 and older Windows builds.
+    qputenv("QT_QPA_PLATFORM", "windows:nodirectwrite");
+  }
+#endif
+
   QGuiApplication app(argc, argv);
   QQuickStyle::setStyle(QStringLiteral("Material"));