Fix Google OAuth: add redirectURIOnProviderDashboard parameter

- SuperTokens requires redirectURIOnProviderDashboard param
- Construct it from NEXT_PUBLIC_APP_URL or window.location.origin
- Properly encode the redirect URI in the query string
- Fixes 400 error: 'Please provide the redirectURIOnProviderDashboard'

Co-authored-by: Cursor <cursoragent@cursor.com>

app/components/SuperTokensAuthComponent.tsx

@@ -10,8 +10,14 @@ export default function SuperTokensAuthComponent() {
   const handleGoogleSignIn = async () => {
     setIsLoading(true);
     try {
+      // Get the base URL from environment or current window
+      const baseUrl = process.env.NEXT_PUBLIC_APP_URL || window.location.origin;
+      const redirectUri = `${baseUrl}/api/auth/callback/google`;
+      
       // Get Google OAuth URL from SuperTokens
-      const response = await fetch("/api/auth/authorisationurl?thirdPartyId=google");
+      const response = await fetch(
+        `/api/auth/authorisationurl?thirdPartyId=google&redirectURIOnProviderDashboard=${encodeURIComponent(redirectUri)}`
+      );
       const data = await response.json();
       
       if (data.status === "OK") {