[Feature]: connecting active session dasboard with backend

[ADARSHsri2004]

So, what is it about?

Description

create backend API and connect with dashboard so that

• Users can view all active sessions dynamically from the backend.
• Revoking a session should immediately remove it from the list.
• Secure token-based verification should prevent unauthorized access.

Code of Conduct

• I agree to follow this project's Code of Conduct

[ADARSHsri2004]

@04shubham7 i can work on this .

APPROACH:

• Implement backend endpoint GET /api/sessions to fetch all active user sessions for the logged-in user.
• Implement backend endpoint DELETE /api/sessions/:sessionId to revoke a specific session.
• Connect the frontend ActiveSessions.tsx component with these endpoints.
• Ensure proper JWT authentication and session validation.
• Display success/error toasts for revoke actions.
• Test with multiple active sessions across devices.