add audio_text handler for room request

src/app/components/Main.tsx

@@ -100,6 +100,7 @@ export default function Main() {
         id: m.id,
         role: m.role,
         content: m.content,
+        audioText: m.audio_text ?? undefined,
         timestamp: new Date(m.created_at).getTime(),
         sources: m.sources ?? [],
       }));

src/services/api.ts

@@ -40,6 +40,7 @@ export interface RoomMessage {
   id: string;
   role: "user" | "assistant";
   content: string;
+  audio_text?: string | null;
   created_at: string;
   sources?: ChatSource[];
 }