Fixes blank screen if the user chooses to Connect Now during onboarding

lib/features/macos_extension/macos_extension_dialog.dart

@@ -37,9 +37,11 @@ class _MacOSExtensionDialogState extends ConsumerState<MacOSExtensionDialog> {
       }
       if (systemExtensionStatus.status == SystemExtensionStatus.installed ||
           systemExtensionStatus.status == SystemExtensionStatus.activated) {
-        appLogger.info(
-            "System Extension is installed and activated. Closing dialog.");
-        appRouter.pop();
+        WidgetsBinding.instance.addPostFrameCallback((_) {
+          appLogger.info(
+              "System Extension is installed and activated. Closing dialog.");
+          appRouter.pop();
+        });
       }
       return null;
     }, [systemExtensionStatus.status]);

lib/features/onboarding/onboarding.dart

@@ -26,13 +26,17 @@ class _OnboardingState extends ConsumerState<Onboarding> {
 
     void onboardingCompleted() {
       ref.read(appSettingProvider.notifier).setOnboardingCompleted(true);
+      final shouldShowExtensionDialog =
+          appSetting.showSplashScreen && PlatformUtils.isMacOS;
       appRouter.pop();
-      if (appSetting.showSplashScreen && PlatformUtils.isMacOS) {
+      if (shouldShowExtensionDialog) {
         appLogger.info("Showing System Extension Dialog");
-        appRouter.push(const MacOSExtensionDialog());
+        // Defer the push to the next frame to avoid calling setState during build
+        WidgetsBinding.instance.addPostFrameCallback((_) {
+          appRouter.push(const MacOSExtensionDialog());
+        });
         // User has seen dialog, do not show again
         appLogger.info("Setting showSplashScreen to false");
-
         ref.read(appSettingProvider.notifier).setSplashScreen(false);
         return;
       }
@@ -120,7 +124,6 @@ class _OnboardingState extends ConsumerState<Onboarding> {
                 label: 'skip_connect_now'.i18n,
                 textColor: AppColors.gray9,
                 onPressed: () {
-                  appRouter.pop();
                   onboardingCompleted();
                 },
               )
@@ -243,14 +246,16 @@ class _OnboardingState extends ConsumerState<Onboarding> {
     final routeMode =
         ref.watch(appSettingProvider.select((value) => value.routingMode));
     useEffect(() {
-      final routeMode =
-      ref.read(appSettingProvider.select((v) => v.routingMode));
+      Future(() {
+        final routeMode =
+            ref.read(appSettingProvider.select((v) => v.routingMode));
 
-      if (routeMode == RoutingMode.full) {
-        ref
-            .read(appSettingProvider.notifier)
-            .setRoutingMode(RoutingMode.smart);
-      }
+        if (routeMode == RoutingMode.full) {
+          ref
+              .read(appSettingProvider.notifier)
+              .setRoutingMode(RoutingMode.smart);
+        }
+      });
 
       return null;
     }, const []);