don't use named events for data messages

see
https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events#event_stream_format
- named events are superfluous for sequences of strictly data messages.

api/openai.go

@@ -346,13 +346,11 @@ func chatEndpoint(cm *ConfigMerger, debug bool, loader *model.ModelLoader, threa
 					enc := json.NewEncoder(&buf)
 					enc.Encode(ev)
 
-					fmt.Fprintf(w, "event: data\n\n")
 					fmt.Fprintf(w, "data: %v\n\n", buf.String())
 					log.Debug().Msgf("Sending chunk: %s", buf.String())
 					w.Flush()
 				}
 
-				w.WriteString("event: data\n\n")
 				resp := &OpenAIResponse{
 					Model:   input.Model, // we have to return what the user sent here, due to OpenAI spec.
 					Choices: []Choice{{FinishReason: "stop"}},