[Bug]: Dark Theme Not Working on Login and Register Pages

Description A clear and concise description of what the bug is.

To Reproduce Steps to reproduce the behavior:

1. Go to the Login or Register page.
2. Click on the dark theme toggle switch.
3. Scroll down or interact with the page.
4. The theme does not change as expected.

Expected behavior When the dark theme toggle is clicked, the theme should switch to a dark mode, applying the appropriate colors across the entire page.

Environment:

• OS : windows
• Browser : chrome

Additional context This issue only seems to affect the Login and Register pages. Other sections of the site respond correctly to the dark theme toggle.