Improve UI for date time picker for smart-datetime-picker

I was going through the edit page of a link and found that the UI for it does not follow the design system of Dub. I want to propose a date time picker that matches the theme of the rest of the application

<img width="1072" height="613" alt="Image" src="https://github.com/user-attachments/assets/558d1ccb-4612-4af7-aa87-671ded1bb1aa" />