session-end screen doesn't follow settings.theme.base

[levi-jcbs]

Describe the bug When I set settings.theme.base: light in a brand but the browser is set to dark-theme, authentik does not use the configured light-theme but the browser preferred dark-theme in the session-end screen. This only happens in the session-end screen, everywhere else it's working correctly.

To Reproduce Steps to reproduce the behavior:

1. Set settings.theme.base: light in your current brand
2. Set your browser to dark theme
3. Log out of Application
4. Authentik will use the browser-preferred theme (dark) instead of the configured (light) theme

Expected behavior If settings.theme.base is set in the brand's attributes, authentik should follow it everywhere.

Version and Deployment (please complete the following information):

• authentik version: 2024.8.1
• Deployment: podman, on the basis of docker-compose