Sort clients by name in Manage Clients modal

We have a lot of clients now, and the sorting appears to preserve whatever order the API returns them in. It would be nice to sort these alphabetically.

<img width="512" height="900" alt="Image" src="https://github.com/user-attachments/assets/afdb3240-8fb3-4cd3-9c24-beb042c427b4" />