Revert "chore: rm icon next to question bubble"

This reverts commit 565b0c5a9c.

frontend/src/conversation/ConversationBubble.tsx

@@ -58,6 +58,7 @@ const ConversationBubble = forwardRef<
         ref={ref}
         className={`flex flex-row-reverse self-end flex-wrap ${className}`}
       >
+        <Avatar className="mt-2 text-2xl" avatar="🧑‍💻"></Avatar>
         <div
           style={{
             wordBreak: 'break-word',