minor changes

nonpacks/library/views.py

@@ -156,13 +156,30 @@ def _tags_from_text(text):
     return pairs
 
 
+def _managed_creator_names(project):
+    """Slugified usernames of the owner + contributors — the creator tags that
+    sync_creator_tags manages automatically. Creator tags that are NOT backed
+    by an account (e.g. an offline artist) are treated as manual and stay
+    editable/removable."""
+    names = {slugify_tag(project.owner.username)}
+    names.update(
+        slugify_tag(c.user.username)
+        for c in project.contributors.select_related('user')
+    )
+    return names
+
+
 def _apply_tags(project, raw_tags, actor):
-    """Replace a project's manual tags (auto-creating new ones). Creator tags
-    are managed separately by sync_creator_tags."""
+    """Replace a project's manual tags (auto-creating new ones). Account-backed
+    creator tags (owner + contributors) are managed by sync_creator_tags and
+    preserved; any other creator tag is editable like any other manual tag."""
     creator_cat = TagCategory.objects.filter(slug='creator').first()
     to_delete = project.tag_links.all()
     if creator_cat is not None:
-        to_delete = to_delete.exclude(tag__category=creator_cat)
+        to_delete = to_delete.exclude(
+            tag__category=creator_cat,
+            tag__name__in=_managed_creator_names(project),
+        )
     to_delete.delete()
 
     for category_slug, name in _tags_from_text(raw_tags):
@@ -178,11 +195,18 @@ def _apply_tags(project, raw_tags, actor):
 
 
 def _current_tags(project):
-    """Serialize a project's non-creator tags back to 'category:name' form."""
+    """Serialize a project's editable tags back to 'category:name' form.
+
+    Account-backed creator tags (owner + contributors) are auto-managed and
+    hidden; manual creator tags (no matching account) remain visible so they
+    can be removed."""
     creator_cat = TagCategory.objects.filter(slug='creator').first()
     qs = project.tag_links.select_related('tag__category').all()
     if creator_cat is not None:
-        qs = qs.exclude(tag__category=creator_cat)
+        qs = qs.exclude(
+            tag__category=creator_cat,
+            tag__name__in=_managed_creator_names(project),
+        )
     return ' '.join(f'{tl.tag.category.slug}:{tl.tag.name}' for tl in qs)