refactor

backend/api/serializers/_helpers.py

@@ -0,0 +1,10 @@
+from typing import Any
+
+
+def absolute_image_url(serializer: Any, image_field: Any) -> str | None:
+    if not image_field:
+        return None
+    request = serializer.context.get("request")
+    if request:
+        return request.build_absolute_uri(image_field.url)
+    return image_field.url