Each organizer is different, so the sender identity of ticket emails is
now per event rather than per instance:
- `extra.organizer_name` → From display name "Organizer via <site title>"
(site title alone when unset). The From address stays the instance
mailbox — that is what DKIM signs — so this costs nothing in mail auth.
- `extra.reply_to_email` → Reply-To; blank falls back to the email on the
LNbits account that owns the event wallet; no header when neither
exists. When a reply-to exists the body says "Questions? Reply to this
email and it reaches <organizer>", and "Organizer: <name>" is listed
with the ticket details.
Both fields sit next to the existing per-event subject/body in the admin
dialog. The organizer's own wording (in whatever language) remains
`notification_body`.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EYwoAkZZmXMMmaBp4WGUBo
