Fix production 404 errors: Add missing OAuth endpoints and domain script

frontend/src/App.tsx

@@ -4,7 +4,7 @@
 
 import React, { useState } from 'react';
 import { useTranslation } from 'react-i18next';
-import { HashRouter as Router, Routes, Route, Navigate } from 'react-router-dom';
+import { BrowserRouter as Router, Routes, Route, Navigate } from 'react-router-dom';
 import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
 import { useCurrentUser, useMasquerade, useLogout } from './hooks/useAuth';
 import { useCurrentBusiness } from './hooks/useBusiness';
@@ -242,17 +242,25 @@ const AppContent: React.FC = () => {
     );
   }
 
-  // Not authenticated on subdomain - show login
+  // Not authenticated - show marketing pages
   if (!user) {
     return (
       <Routes>
+        <Route element={<MarketingLayout user={user} />}>
+          <Route path="/" element={<HomePage />} />
+          <Route path="/features" element={<FeaturesPage />} />
+          <Route path="/pricing" element={<PricingPage />} />
+          <Route path="/about" element={<AboutPage />} />
+          <Route path="/contact" element={<ContactPage />} />
+          <Route path="/signup" element={<SignupPage />} />
+        </Route>
         <Route path="/login" element={<LoginPage />} />
         <Route path="/mfa-verify" element={<MFAVerifyPage />} />
         <Route path="/oauth/callback/:provider" element={<OAuthCallback />} />
         <Route path="/verify-email" element={<VerifyEmail />} />
         <Route path="/accept-invite" element={<AcceptInvitePage />} />
         <Route path="/tenant-onboard" element={<TenantOnboardPage />} />
-        <Route path="*" element={<Navigate to="/login" replace />} />
+        <Route path="*" element={<Navigate to="/" replace />} />
       </Routes>
     );
   }