fix: prevent auth dialog jankiness on start

src/MainWindow.cpp

@@ -19,10 +19,15 @@ MainWindow::MainWindow(QWidget *parent)
   ui = new Ui::MainWindow;
   ui->setupUi(this);
 
-  // Show auth dialog initially (user sees this while init() checks for session)
   m_authDialog->setModal(true);
-  m_authDialog->reset();
-  m_authDialog->show();
+
+  QTimer::singleShot(3000, this, [this]() {
+    if (!m_authManager->isSignedIn())
+    {
+      m_authDialog->reset();
+      m_authDialog->show();
+    }
+  });
 
   // Connect signal so dialog hides if valid session found, shows and resets on sign out
   connect(m_authManager, &AuthManager::isSignedInChanged, this, [this]() {