Supress frontend exception on unhandled message type (comfyanonymous#4078)

* Supress frontend exception on unhandled message type

* nit

Author: huchenlei

web/scripts/api.js

@@ -136,6 +136,9 @@ class ComfyApi extends EventTarget {
 					    case "execution_start":
 						    this.dispatchEvent(new CustomEvent("execution_start", { detail: msg.data }));
 						    break;
+					    case "execution_success":
+						    this.dispatchEvent(new CustomEvent("execution_success", { detail: msg.data }));
+						    break;
 					    case "execution_error":
 						    this.dispatchEvent(new CustomEvent("execution_error", { detail: msg.data }));
 						    break;