feat(conversation): TTS 投递与 WebSocket 管线；客户端播放门禁与会话页联动；COS 键与迁移脚本调整

app-expo/src/core/ws/client.ts

@@ -49,6 +49,7 @@ function mapServerMessage(raw: RawServerMessage): WsEvent | null {
         audioUrl: d.audio_url as string | undefined,
         index: d.index as number | undefined,
         total: d.total as number | undefined,
+        assistantMessageId: d.assistant_message_id as string | undefined,
       };
 
     case 'end_conversation':
@@ -166,6 +167,10 @@ export class WsClient {
     return this.send({ type: 'text', data: { text } });
   }
 
+  sendTtsCancel(): boolean {
+    return this.send({ type: 'tts_cancel', data: {} });
+  }
+
   sendEndConversation(): boolean {
     return this.send({ type: 'end_conversation', data: {} });
   }