feat: Refine 2fa (#11766)

* wip

* Update 2fa.qrdialog.vue

* Update 2fa.vue

* Update CHANGELOG.md

* tweak

* ✌️

packages/frontend/.storybook/generate.tsx

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import { existsSync, readFileSync } from 'node:fs';
 import { writeFile } from 'node:fs/promises';
 import { basename, dirname } from 'node:path/posix';