Test popup remapping and keep headless input tests isolated

tools/chatgui/src/user_activity_monitor.cpp

@@ -184,6 +184,8 @@ void UserActivityMonitor::useLocalActivity() {
 }
 
 qint64 UserActivityMonitor::systemIdleTime() {
+    const QString platform = QGuiApplication::platformName();
+    if (platform == "offscreen" || platform == "minimal") return -1;
 #ifdef Q_OS_WIN
     LASTINPUTINFO info = {sizeof(info), 0};
     if (!GetLastInputInfo(&info)) { GUI_WARN("activity: GetLastInputInfo failed error=%lu", GetLastError()); return -1; }