Function refreshTokens

frontend/src/connect/refreshToken.ts:14–25

()

 * Only one tab performs the refresh; others wait for completion.
 */
export async function refreshTokens(): Promise<void> {
  // Same-tab deduplication
  if (localPromise) {
    return localPromise;
  }

  localPromise = doRefresh().finally(() => {
    localPromise = null;
  });

  return localPromise;
}

async function doRefresh(): Promise<void> {
  if (await tryAcquireAndRefresh()) {