- Add helpers/NotificationHelper.php: shared Matrix webhook sender
that reads MATRIX_WEBHOOK_URL and MATRIX_NOTIFY_USERS from config
- Remove sendDiscordWebhook() from TicketController; call
NotificationHelper::sendTicketNotification() instead
- Replace 60-line Discord embed block in create_ticket_api.php
with a single NotificationHelper call
- config/config.php: DISCORD_WEBHOOK_URL → MATRIX_WEBHOOK_URL +
new MATRIX_NOTIFY_USERS key (comma-separated Matrix user IDs)
- .env.example: updated env var names and comments
Payload sent to hookshot includes notify_users array so the
JS transform can build proper @mention links for each user.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
