feat: group people by role priority

apps/products/models.py

@@ -227,7 +227,7 @@ class Article(models.Model):
 class ProjectPerson(models.Model):
     role = models.CharField(
         "Role / group", max_length=100, default="Collaborator",
-        help_text="Type Organizer, Collaborator, or any other role name.",
+        help_text="Type Lead, Leader, Organizer, Collaborator, or any other role name.",
     )
     name = models.CharField(max_length=200)
     description = models.TextField(blank=True)
@@ -239,23 +239,25 @@ class ProjectPerson(models.Model):
     url = models.URLField(blank=True)
     order = models.PositiveIntegerField(
         "Display order", default=0,
-        help_text="Smaller numbers appear first. Organizers appear before collaborators, then custom roles.",
+        help_text="Smaller numbers appear first within each role. Leads/Leaders, Organizers, Collaborators, then custom roles.",
     )
 
     class Meta:
         abstract = True
         ordering = [
             models.Case(
-                models.When(role__iexact="organizer", then=models.Value(0)),
-                models.When(role__iexact="collaborator", then=models.Value(1)),
-                default=models.Value(2), output_field=models.IntegerField(),
+                models.When(role__iexact="lead", then=models.Value(0)),
+                models.When(role__iexact="leader", then=models.Value(0)),
+                models.When(role__iexact="organizer", then=models.Value(1)),
+                models.When(role__iexact="collaborator", then=models.Value(2)),
+                default=models.Value(3), output_field=models.IntegerField(),
             ),
             "order", "pk",
         ]
 
     @property
     def role_label(self):
-        return self.role.title() if self.role.casefold() in {"organizer", "collaborator"} else self.role
+        return self.role.title() if self.role.casefold() in {"lead", "leader", "organizer", "collaborator"} else self.role
 
     def __str__(self):
         return f"{self.name} ({self.role_label})"