fix whisper join

src/chatbox.tsx

@@ -525,14 +525,15 @@ export default function ChatBOX(props: {
                 }
 
                 // build prompt
-                const prompt =
+                const prompt = [chatStore.systemMessageContent]
+                  .concat(
                     chatStore.history
                       .filter(({ hide }) => !hide)
                       .slice(chatStore.postBeginIndex)
                       .map(({ content }) => content)
-                    .join(" ") +
+                  )
-                  " " +
+                  .concat([inputMsg])
-                  inputMsg;
+                  .join(" ");
                 console.log({ prompt });
 
                 setIsRecording("Recording");