upgrade run ui

backend/src/server.py

@@ -18,8 +18,10 @@ frontend_path = '../../frontend/dist'
 
 def encode_json(value):
     def encode_unknown(value):
-        if value is ToolSpec:
+        if isinstance(value, ToolSpec):
             return value.to_openai_dict()
+        elif isinstance(value, Stream):
+            return {'streamId': value.id}
         else:
             return repr(value)
     return json.dumps(value, default=encode_unknown)