Fix/ui fixes

Issue description (clear version):

The dashboard UI had four core problems:

1. Profile behavior in navbar

• Navbar had a direct Logout button.
• It should show a profile icon, and on click open a dropdown.
• Dropdown should show the logged-in user’s number (from login credentials) and logout action.

2. Intern add/search input not clearing

• In the team add-intern input, after clicking Add Intern, the selected name could still remain.
• Expected behavior: input must become empty immediately after successful add.

3. Team summary cards mismatch

• The top team-wise summary included an unwanted Completed box.
• Expected: only Teams and Interns boxes should be visible.

4. Extra intern action buttons

• Intern rows showed actions beyond required scope.
• Expected: only Edit and Delete buttons should be visible (remove Completed/Verify actions).

Impact:

• Confusing profile identity display,
• slower repeated intern additions due to uncleared input,
• cluttered dashboard cards/actions not matching expected workflow/UI.