Add due date field to task card

[anoopcodehack]

Add a due date picker in TaskModal.jsx
Show it on the TaskCard with red color if overdue.
File: client/src/components/Board/TaskCard.jsx

Line: task.snippets[0].code — hardcoded to index 0!
If a task has 3 snippets, only the first shows.

Fix: map over task.snippets and show each one
with a tab switcher (Snippet 1 | Snippet 2 | Snippet 3)

[Yahia101Imad]

Hi @anoopcodehack !
I'd like to work on this issue. I've already started looking into it, Could you assign it to me?