{# "Surname, Name" when the profile has both, whichever it has otherwise, and
   the account's address for a profile not filled in yet (an account opened
   without asking for a name), so the menu never reads as a lone comma. #}
{% set profile = current_user.profile %}
{% set parts = [profile.surname, profile.name] | select | list if profile else [] %}
<a class="nav-link dropdown-toggle d-none d-sm-inline-block" href="#"
   data-bs-toggle="dropdown">
    <span class="text-dark">{{ parts | join(', ') if parts else current_user.email }}</span>
</a>