Send Events mail from platform SMTP like Invoice, not owner Bird domain.

Use EventMailer with MAIL_FROM and organiser Reply-To instead of the Bird API, which rewrote the From address onto the account's verified domain (e.g. climp.me). Redesign the speaker invitation to use the shared Events email layout.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Services/Events/EventRegistrationService.php

@@ -276,6 +276,8 @@ class EventRegistrationService
                 $registration->badge_code,
                 $joinUrl !== '' ? $joinUrl : null,
                 $registration->attendee_name,
+                $registration->qrCode?->user?->email,
+                $registration->qrCode?->user?->name,
             );
         }