fix(chat): hide voice message transcript

src/app/chat/components/voice-bubble.tsx

@@ -7,13 +7,11 @@ import styles from "./voice-bubble.module.css";
 
 export interface VoiceBubbleProps {
   audioUrl: string;
-  content?: string;
   isFromAI: boolean;
 }
 
 export function VoiceBubble({
   audioUrl,
-  content = "",
   isFromAI,
 }: VoiceBubbleProps) {
   const audioRef = useRef<HTMLAudioElement>(null);
@@ -82,7 +80,6 @@ export function VoiceBubble({
           <span />
           <span />
         </div>
-        {content.length > 0 ? <p className={styles.text}>{content}</p> : null}
         {hasError ? (
           <p className={styles.error}>Voice message failed to load.</p>
         ) : null}