Improve auth flow error handling and add debug logging

- Add early returns for better error handling flow
- Add console.log for SignUp result to debug user creation
- Ensure loading state is always reset properly
- Add explicit check for missing user data after signUp

src/pages/Auth.tsx

@@ -69,6 +69,9 @@ export default function Auth() {
       }
 
       const { error, data } = await signUp(email, password, name);
+
+      console.log('SignUp result:', { error, data, hasUser: !!data?.user, hasSession: !!data?.session });
+
       if (error) {
         if (error.message.includes('already registered')) {
           toast({ title: 'Error', description: 'This email is already registered. Please login instead.', variant: 'destructive' });
@@ -76,7 +79,15 @@ export default function Auth() {
           toast({ title: 'Error', description: error.message, variant: 'destructive' });
         }
         setLoading(false);
-      } else if (data?.user) {
+        return;
+      }
+
+      if (!data?.user) {
+        toast({ title: 'Error', description: 'Failed to create user account. Please try again.', variant: 'destructive' });
+        setLoading(false);
+        return;
+      }
+
       // User created, now send OTP
       const userId = data.user.id;
       console.log('User created successfully:', { userId, email, session: data.session });
@@ -98,7 +109,6 @@ export default function Auth() {
       }
       setLoading(false);
     }
-    }
   };
 
   const handleOTPSubmit = async (e: React.FormEvent) => {