Fix bugs (#232)

* fix default engine settings

* fix conversation & cloudflare transcribe

* update arm64/darwin whisper

* empty notice for conversations

* display user rankings

* fix enjoy ai

* update whisper.cpp for arm64 darwin to v1.5.4

* upgrade yarn to 4.1.0

enjoy/src/renderer/components/preferences/default-engine-settings.tsx

@@ -31,9 +31,10 @@ export const DefaultEngineSettings = () => {
         <Select
           value={defaultEngine}
           onValueChange={(value) => {
-            setDefaultEngine(value);
-            if (value === "openai" && !openai.key) {
+            if (value === "openai" && !openai?.key) {
               toast.warning(t("openaiKeyRequired"));
+            } else {
+              setDefaultEngine(value);
             }
           }}
         >