BUG: Page automatically switches to light mode even if it was previously set to dark mode

[MrPC7]

Issue Description
When the page is refreshed, it automatically switches to light mode even if it was previously set to dark mode.

Steps to Reproduce

1. Open the web application.
2. Toggle the theme to dark mode.
3. Refresh the page.

Expected Behavior
The page should retain the dark mode setting after being refreshed.

Actual Behavior
The page reverts to light mode upon refresh, ignoring the previously set dark mode preference.

Solution Description

Stored the theme preference in localStorage and ensured it is retrieved and applied on page load to maintain the selected mode after refresh.

Assign me this issue under GSSOC24.

[Sooraj002]

I would like to resolve this issue.

[MrPC7]

@JiyaGupta-cs