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' });
@@ -76,28 +79,35 @@ export default function Auth() {
           toast({ title: 'Error', description: error.message, variant: 'destructive' });
         }
         setLoading(false);
-      } else if (data?.user) {
+        return;
-        // User created, now send OTP
-        const userId = data.user.id;
-        console.log('User created successfully:', { userId, email, session: data.session });
-
-        const result = await sendAuthOTP(userId, email);
-
-        console.log('OTP send result:', result);
-
-        if (result.success) {
-          setPendingUserId(userId);
-          setShowOTP(true);
-          setResendCountdown(60); // 60 seconds cooldown
-          toast({
-            title: 'OTP Terkirim',
-            description: 'Kode verifikasi telah dikirim ke email Anda. Silakan cek inbox.',
-          });
-        } else {
-          toast({ title: 'Error', description: result.message, variant: 'destructive' });
-        }
-        setLoading(false);
       }
+
+      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 });
+
+      const result = await sendAuthOTP(userId, email);
+
+      console.log('OTP send result:', result);
+
+      if (result.success) {
+        setPendingUserId(userId);
+        setShowOTP(true);
+        setResendCountdown(60); // 60 seconds cooldown
+        toast({
+          title: 'OTP Terkirim',
+          description: 'Kode verifikasi telah dikirim ke email Anda. Silakan cek inbox.',
+        });
+      } else {
+        toast({ title: 'Error', description: result.message, variant: 'destructive' });
+      }
+      setLoading(false);
     }
   };