use agentname in ws actions and frontend

backend/src/app.py

@@ -103,6 +103,12 @@ class App(ChatMixin):
             raise Exception(f"Agent not found with id {agent_id}")
         return agent
 
+    async def agent_id_from_name(self, agentname: str):
+        agent_id = await db.Agent.get_or_none(agentname=agentname).values_list("id", flat=True)
+        if not agent_id:
+            raise Exception(f"Agent not found with agentname {agentname}")
+        return agent_id
+
     async def create_agent(self, user_id, name, agentname, description, picture, kind, data, main_chat_id=None, temporary=False):
         print("create_agent; user_id, name:", user_id, name)