Improve remote Matrix token refresh

src/bootstrap.ts

@@ -22,9 +22,9 @@ import {
   ChatService,
   MatrixClient,
   MatrixMediaDownloader,
+  MatrixTokenRefresher,
   extractMatrixCredentials,
   loadCachedCredentials,
-  type TokenRefresher,
   type UsernameResolver,
   type MatrixCredentials,
 } from './services/chat/index.js';
@@ -187,16 +187,15 @@ export async function bootstrap(config: Config, logger: Logger): Promise<AppCont
   const mediaDownloader = new MatrixMediaDownloader(matrixClient, logger);
   const mediaService = new MediaService(mediaDownloader, logger);
 
-  // 3. Token refresher — on 401, re-sniff via the running browser session
-  //    and swap the new credentials into the chat service.
+  // 3. Token refresher — on 401, restore the persistent Reddit session when
+  //    possible, re-sniff once, and swap credentials into the chat service.
+  //    Concurrent callers share that refresh rather than opening extra pages.
   let chatService: ChatService;
-  const tokenRefresher: TokenRefresher = {
-    async refresh() {
-      const fresh = await extractMatrixCredentials(browserClient.getContext()!, logger);
-      const next = new MatrixClient(fresh, logger);
-      chatService.setMatrixClient(next);
-    },
-  };
+  const tokenRefresher = new MatrixTokenRefresher(
+    browserClient,
+    logger,
+    (fresh) => chatService.setMatrixClient(new MatrixClient(fresh, logger)),
+  );
 
   // 4. Username resolver — turns t2 IDs into real Reddit usernames so the
   //    dashboard isn't full of `t2_abc123`. Uses Reddit's bulk endpoint.