Assistant ignore Nextcloud light theme and use browser default

[slu-010101]

Which version of assistant are you using?

3.4.0

Which version of Nextcloud are you using?

33.0.3

Which browser are you using? In case you are using the phone App, specify the Android or iOS version and device please.

Firefox 150.0.1

Describe the Bug

Firefox default theme "dark"
Nextcloud setting "Light theme"

Assistant ignore the Nextcloud theme setting and use the browser default dark.

Expected Behavior

Assistant should use the Nextcloud theme setting.

To Reproduce

Set browser default theme to dark and Nextcloud theme to "Light theme".

[julien-nc]

Fixed by #519