fix: restore and simplify events

backend/src/server.py

@@ -141,7 +141,7 @@ async def start_server(app):
             
             # Listen for events and broadcast them
             async def on_event(name, data):
-                await send({"action": event, "name": name, "data": data})
+                await send({"action": "event", "name": name, "data": data})
             app.on_event(on_event)
 
             while True: