hiring: логин в формате <буква имени>.<фамилия>

Иван Иванов -> i.ivanov (транслит pytils, нижний регистр, коллизия +счётчик).
Раньше slugify('Фамилия.Имя') терял точку и давал ivanovivan. Единый формат
в найме (_generate_username) и в импорте (transliterate_username).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

apps/employees/management/commands/import_employees_json.py

@@ -58,7 +58,9 @@ DEPT_73_NAME_TO_CODE = {
 
 def transliterate_username(last_name, first_name, taken):
     from pytils.translit import slugify
-    base = slugify(f'{last_name}.{first_name}') or 'user'
+    # Формат: <первая буква имени>.<фамилия> (Иван Иванов -> i.ivanov).
+    ln, fn = slugify(last_name), slugify(first_name)
+    base = f'{fn[:1]}.{ln}'.strip('.') or 'user'
     username = base
     counter = 1
     while username in taken or Employee.objects.filter(username=username).exists():

apps/hiring/services.py

@@ -11,8 +11,17 @@ from apps.employees.models.base import Employee
 from apps.hiring.models import HiringRequest, InternAccount
 
 
+def _username_base(last_name, first_name):
+    """Формат логина: <первая буква имени>.<фамилия>, транслит, нижний регистр.
+    Иван Иванов -> i.ivanov."""
+    ln = slugify(last_name)
+    fn = slugify(first_name)
+    initial = fn[:1]
+    return f'{initial}.{ln}'.strip('.') or 'user'
+
+
 def _generate_username(last_name, first_name):
-    base = slugify(f'{last_name}.{first_name}') or 'user'
+    base = _username_base(last_name, first_name)
     username = base
     counter = 1
     while Employee.objects.filter(username=username).exists():