refactor websocket message protocol, keep the only connection for all clients

api/service/ws_service.go

@@ -5,3 +5,9 @@ import "geekai/core/types"
 type WebsocketService struct {
 	Clients *types.LMap[string, *types.WsClient] // clientId => Client
 }
+
+func NewWebsocketService() *WebsocketService {
+	return &WebsocketService{
+		Clients: types.NewLMap[string, *types.WsClient](),
+	}
+}