Enhance: 2段階認証時のリカバリーコードのファイル名にサーバーURLを含めるように (#15677)

* enhance(frontend): include server hostname and port in 2fa recovery code filename

* chore(frontend): fix mistake(use `@` for indicate server hostname)

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Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>

packages/frontend-shared/js/config.ts

@@ -12,6 +12,7 @@ const siteName = document.querySelector<HTMLMetaElement>('meta[property="og:site
 export const host = address.host;
 export const hostname = address.hostname;
 export const url = address.origin;
+export const port = address.port;
 export const apiUrl = location.origin + '/api';
 export const wsOrigin = location.origin;
 export const lang = localStorage.getItem('lang') ?? 'en-US';