System Information:

Webmin Version: 2.500
Authentic theme version: 25.00
Operating System: Ubuntu Linux 24.04.3
Kernel and CPU: Linux 6.8.0-79-generic on x86_64

Description of the Bug:
When reopening webmin the dark mode setting is not retained.
The dark mode is set, but the page is rendered in light mode.
Need to toggle back to light mode, then toggle dark mode as a work around.

Steps to Reproduce:
Toggle Dark Mode
Close Webmin
Open Webmin in new page or tab

Expected Behavior:
Dark mode should be retained between page loads

Actual Behavior:
Light mode is used when page is reopened, even when dark mode is set.