Enhance staff member name retrieval with additional fallbacks

[adamspd]

Enhance staff member name retrieval with additional fallbacks

When choosing a staff member, the name retrieval process follows these steps:

1. Get full name
2. If empty, get username
3. If username empty, get email (new)
4. If email is empty too, return "Staff Member {id}" (new)

This pull request adds steps 3 and 4 to provide better fallbacks when limited user information is available.

Note: The correct practice when adding a staff member is to include all relevant user information. These fallbacks are implemented to handle edge cases and ensure a meaningful identifier is always returned.

See issue #237