Send notification when attendee is removed from event

[tompscanlan]

Problem

Users are not notified when a host removes them from an event, creating confusion.

Solution

Send email and in-app notification when attendee is removed.

Implementation

Location: src/event-attendee/event-attendee.service.ts

async remove(eventId: number, attendeeId: number) {
  const attendee = await this.findOne(attendeeId);
  const event = await this.eventService.findOne(eventId);

  await this.eventAttendeeRepository.delete(attendeeId);

  // Send notification
  await this.notificationService.sendRemovedFromEvent(
    attendee.userId,
    event
  );
}

Email Template: Create templates/event-attendee-removed.mjml

Subject: Update about [Event Name]

Hi [User Name],

The host has updated the attendee list for [Event Name]
and you are no longer registered.

If you have questions, please contact the host.

Event: [Event Name]
Date: [Event Date]
Host: [Host Name]

Files to Create/Modify

• MJML template: templates/event-attendee-removed.mjml
• Notification service method

Acceptance Criteria

• Email sent when user removed
• In-app notification created
• Clear message with event details
• No error if user already removed