Theme in vault only enables after page reload

[PrajwolAmatya]

Describe the bug

When changing from Drive to Vault for the first time after mfa, the theme is not changed. The theme is only enabled only after page is reloaded.

Screencast.from.2026-05-29.16-50-20.webm

Steps to reproduce

1. Login
2. Change from `Drive` to `Vault`
3. Setup the MFA
...

Expected behavior

The theme should be loaded when user navigates to Vault after setting up MFA.

Actual behavior

The theme is not changed and manual page reloaded is needed for the theme to load.

Setup

- Web version: 12.4.0
- oCIS version: 8.1.0-rc.1
- browser:

OCIS_XXX=somevalue
OCIS_YYY=somevalue
PROXY_XXX=somevalue

Additional context

No response