diff --git a/admin-spa/src/App.tsx b/admin-spa/src/App.tsx
index 26fcf5c..58dffc4 100644
--- a/admin-spa/src/App.tsx
+++ b/admin-spa/src/App.tsx
@@ -266,7 +266,7 @@ function Header({ onFullscreen, fullscreen, showToggle = true }: { onFullscreen:
   
   const handleLogout = async () => {
     try {
-      await fetch(window.WNW_CONFIG.restUrl + '/auth/logout', {
+      await fetch((window.WNW_CONFIG?.restUrl || '') + '/auth/logout', {
         method: 'POST',
         credentials: 'include',
       });
@@ -465,7 +465,7 @@ function AuthWrapper() {
     // In standalone mode, trust the initial PHP auth check
     // PHP uses wp_signon which sets proper WordPress cookies
     if (window.WNW_CONFIG?.standaloneMode) {
-      setIsAuthenticated(window.WNW_CONFIG.isAuthenticated);
+      setIsAuthenticated(window.WNW_CONFIG.isAuthenticated ?? false);
       setIsChecking(false);
     } else {
       // In wp-admin mode, always authenticated
diff --git a/admin-spa/src/routes/Login.tsx b/admin-spa/src/routes/Login.tsx
index 6810a9b..60b46cf 100644
--- a/admin-spa/src/routes/Login.tsx
+++ b/admin-spa/src/routes/Login.tsx
@@ -20,7 +20,7 @@ export function Login() {
     setError('');
 
     try {
-      const response = await fetch(window.WNW_CONFIG.restUrl + '/auth/login', {
+      const response = await fetch((window.WNW_CONFIG?.restUrl || '') + '/auth/login', {
         method: 'POST',
         headers: {
           'Content-Type': 'application/json',
@@ -118,7 +118,7 @@ export function Login() {
           {/* Footer Links */}
           <div className="mt-6 space-y-3">
             <a
-              href={window.WNW_CONFIG.wpAdminUrl}
+              href={window.WNW_CONFIG?.wpAdminUrl || '/wp-admin'}
               className="flex items-center justify-center gap-2 text-sm text-blue-600 hover:text-blue-700 dark:text-blue-400 transition-colors"
             >
               <ArrowLeft className="w-4 h-4" />
@@ -127,7 +127,7 @@ export function Login() {
             
             <div className="text-center">
               <a
-                href={window.WNW_CONFIG.siteUrl + '/wp-login.php?action=lostpassword'}
+                href={(window.WNW_CONFIG?.siteUrl || '') + '/wp-login.php?action=lostpassword'}
                 className="text-sm text-gray-600 hover:text-gray-700 dark:text-gray-400 transition-colors"
               >
                 {__('Forgot password?')}
@@ -138,7 +138,7 @@ export function Login() {
 
         {/* Site Info */}
         <div className="text-center mt-6 text-sm text-gray-600 dark:text-gray-400">
-          {window.WNW_CONFIG.siteName}
+          {window.WNW_CONFIG?.siteName || 'WooNooW'}
         </div>
       </div>
     </div>
diff --git a/admin-spa/src/types/window.d.ts b/admin-spa/src/types/window.d.ts
index 91ea126..2bc5e81 100644
--- a/admin-spa/src/types/window.d.ts
+++ b/admin-spa/src/types/window.d.ts
@@ -16,11 +16,39 @@ interface WNW_WC_MENUS {
   items?: any[];
 }
 
+interface WNW_CONFIG {
+  standaloneMode?: boolean;
+  restUrl?: string;
+  wpAdminUrl?: string;
+  siteUrl?: string;
+  siteName?: string;
+  isAuthenticated?: boolean;
+  currentUser?: {
+    id: number;
+    name: string;
+    email: string;
+  };
+  user?: {
+    id: number;
+    name: string;
+    email: string;
+  };
+  store?: {
+    currency: string;
+    currencySymbol: string;
+    currencyPosition: string;
+    thousandSeparator: string;
+    decimalSeparator: string;
+    decimals: number;
+  };
+}
+
 declare global {
   interface Window {
     WNW_API?: WNW_API_Config;
     wnw?: WNW_Config;
     WNW_WC_MENUS?: WNW_WC_MENUS;
+    WNW_CONFIG?: WNW_CONFIG;
   }
 }