[Bug]: Email confirmation lack background box

[ChristophWurst]

⚠️ This issue respects the following points: ⚠️

• [X] This is a bug, not a question or a configuration/webserver/proxy issue.
• [X] This issue is not already reported on Github (I've searched it).
• [X] Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• [X] Nextcloud Server is running on 64bit capable CPU, PHP and OS.
• [X] I agree to follow Nextcloud's Code of Conduct.

Bug description

Confirming an email renders text on the background image. There should be a box for it. This is likely a Nextcloud 25 design leftover.

Steps to reproduce

1. Set up a Nextcloud account
2. Add an additional email address on the profile
3. Click the link in the email

Expected behavior

Smooth design

Installation method

None

Nextcloud Server version

26

Operating system

None

PHP engine version

None

Web server

None

Database engine version

None

Is this bug present after an update or on a fresh install?

None

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

• [ ] Default user-backend (database)
• [ ] LDAP/ Active Directory
• [ ] SSO - SAML
• [ ] Other

Configuration report

No response

List of activated Apps

n/a

Nextcloud Signing status

No response

Nextcloud Logs

No response

Additional info

No response

[szaimen]

cc @nextcloud/server-frontend

[susnux]

I would suggest the same style as the dashboard and the login box to keep design consistent.

[joshtrichards]

I guess the templates involved here are:

• https://github.com/nextcloud/server/blob/master/core/templates/confirmation.php
• https://github.com/nextcloud/server/blob/master/core/templates/error.php
• https://github.com/nextcloud/server/blob/master/core/templates/success.php