Improve message schema, assign or create main agent chat automatically

backend/server.py

@@ -119,9 +119,10 @@ def start_server(app):
                     await send({'message': "pong"})
 
                 elif action == "create-agent":
+                    name = body['name']
                     agent_id = app.create_agent(
                         user_id=user_id,
-                        name=body['name'],
+                        name=name,
                         agentname=body.get('agentname'),
                         description=body.get('description'),
                         picture=body.get('picture'),