add change password functionality to the user's preference page

### Description

The preference page has nothing:

<img width="1374" height="674" alt="Image" src="https://github.com/user-attachments/assets/c969c8bd-8b98-479e-8bdd-17c872e3134d" />

This would be a great place to allow a user to change their password.  You can add 2 password text boxes here  (enter new password /confirm new password).

### Estimated Difficulty

Low

### Priority

Low