- Updated billing code label from "Kod" to "Kod pocztowy" for clarity.
- Enhanced error message handling in createFirstUserDataSuccess.php for better user feedback.
- Removed deprecated userdata_order_form.html and userdata_order_form_billing.html.bck templates.
- Adjusted layout in userdata_order_form.html for better responsiveness.
- Added input formatting for postal code in userdata_order_form.html to enforce correct input format.
