Email Invitations Management Dashboard

[Ayaanshaikh12243]

Backend exists: /api/email/* endpoints (send-invitation, send-bulk-invitations, test email service)
Frontend gap: While EmailInvitationModal.jsx exists for inviting during sessions, there's no:

Invitation history/tracking page
Bulk invitation management interface
Template selection/management for invitations
Invitation status tracking (sent, opened, clicked)
What's needed: Create an Invitations page in the dashboard to manage, send, and track email invitations with bulk operations.

[Ayaanshaikh12243]

@anothercoder-nik please assign this issue to me

[anothercoder-nik]

Look currently email service works only when session is started , so keep that in mind and please attach images as well as video of fixes in PR.