fix: retain selected model when regenerating message (#1382)

* fix: retain selected model when regenerating message instead of reverting to default model

* fix: use props model

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Co-authored-by: Shern <shenkeji@corp.netease.com>

src/renderer/src/pages/home/Messages/MessageMenubar.tsx

@@ -197,7 +197,7 @@ const MessageMenubar: FC<Props> = (props) => {
 
   const onRegenerate = async () => {
     await modelGenerating()
-    const _message: Message = resetAssistantMessage(message, assistantModel)
+    const _message: Message = resetAssistantMessage(message, model || assistantModel)
     onEditMessage?.(_message)
   }