Save Button Added to Webshop User Profile

A Save button has been added to the webshop user profile, where customers can edit their contact and account details.

All fields continue to save automatically, and clicking Save does not trigger additional persistence. However, the button validates the form fields and displays validation messages when needed, such as when a postal code is too short.

This improvement helps users feel confident that their changes have been stored successfully, even though saving happens automatically in the background.