dev@locazia: ui fix

app/core/models/node_storage.py

@@ -70,6 +70,6 @@ class StoredContent(AlchemyBase):
             "hash": self.hash,
             "cid": self.cid.serialize_v1(),
             "status": self.status,
-            "updated": self.updated.isoformat(),
-            "created": self.created.isoformat(),
+            "updated": self.updated.isoformat() if self.updated else None,
+            "created": self.created.isoformat() if self.created else None,
         }