fix: add logout button to welcome screen

[Antreesy]

☑️ Resolves

• allows to re-auth in case Network Error persists and client stuck in the infinite loop

🖼️ Screenshots

🏚️ Before	🏡 After

🚧 Tasks

• ...

[nickvergessen]

in case Network Error persists and client stuck in the infinite loop

We should maybe add that info to the screen, instead of looping forever?

[Antreesy]

We don't use translated strings or Vue components on welcome screen, so if we won't keep it 'always English' for simplicity, that would require more efforts

[nickvergessen]

Well I mean:

• No one plans to logout
• The user is not aware that the request failed?
• Should show a dedicated message for maintenance mode, talk being disabled, and other most common problems
• Should show a generic error for others with an "error code" (http status code) so the user can be helped