[Enhancement]: New Task popup uses inconsistent color scheme compared to application UI

[Khushi-Verse]

Description:
The "New Task" popup uses a dark navy-blue color scheme that differs significantly from the application's primary black-and-white theme. This creates visual inconsistency and affects the overall user experience.

Steps to Observe:

1. Open the application.
2. Navigate to the Tasks section.
3. Open the "New Task" popup.
4. Compare the popup styling with the rest of the interface.

Expected Behavior:
The popup should follow the application's established color palette and design system.

Actual Behavior:
The popup uses colors that appear inconsistent with the application's overall UI theme.

Screenshots:

[Khushi-Verse]

Hello Maintainers,

I identified and reported this issue and would be interested in working on it as part of GSSoC 2026. If possible, could you kindly assign this issue to me?

Thank you