Desktop/remove hard requirement auth wall on desktop (#5956)

Co-authored-by: Claude Sonnet 4.6 <[email protected]>

frontend/src/desktop/components/SetupWizard/SaaSLoginScreen.tsx

@@ -15,6 +15,8 @@ interface SaaSLoginScreenProps {
   onOAuthSuccess: (userInfo: UserInfo) => Promise<void>;
   onSelfHostedClick: () => void;
   onSwitchToSignup: () => void;
+  onSkipSignIn?: () => void;
+  onClose?: () => void;
   loading: boolean;
   error: string | null;
 }
@@ -25,6 +27,8 @@ export const SaaSLoginScreen: React.FC<SaaSLoginScreenProps> = ({
   onOAuthSuccess,
   onSelfHostedClick,
   onSwitchToSignup,
+  onSkipSignIn,
+  onClose,
   loading,
   error,
 }) => {
@@ -57,7 +61,7 @@ export const SaaSLoginScreen: React.FC<SaaSLoginScreenProps> = ({
 
   return (
     <>
-      <LoginHeader title={t('setup.saas.title', 'Sign in to Stirling Cloud')} />
+      <LoginHeader title={t('setup.saas.title', 'Sign in to Stirling Cloud')} onClose={onClose} />
 
       <ErrorMessage error={displayError} />
 
@@ -110,6 +114,19 @@ export const SaaSLoginScreen: React.FC<SaaSLoginScreenProps> = ({
       </div>
 
       <SelfHostedLink onClick={onSelfHostedClick} disabled={loading} />
+
+      {onSkipSignIn && (
+        <div className="navigation-link-container" style={{ marginTop: '0.5rem', textAlign: 'center' }}>
+          <button
+            type="button"
+            onClick={onSkipSignIn}
+            className="navigation-link-button"
+            disabled={loading}
+          >
+            {t('setup.login.skipSignIn', 'Continue without signing in')}
+          </button>
+        </div>
+      )}
     </>
   );
 };