fixes

repos/assets_repo.py

@@ -175,6 +175,8 @@ class AssetsRepo:
             filter["linked_char_id"] = character_id
         if created_by:
             filter["created_by"] = created_by
+            if project_id is None:
+                filter["project_id"] = None
         if project_id:
             filter["project_id"] = project_id
         return await self.collection.count_documents(filter)