09-May-2026 - One unsubscribe link, list-scoped ref #18

Tidied up how unsubscribe works in campaign emails. Recipients now see a single Unsubscribe link in each email, and clicking it removes them from just that mailing list rather than blocking every email from your group. There's a separate "update your email subscriptions" link beside it for anyone who wants to manage all their subscriptions at once.

For developers, the click-through chain now resolves correctly when testing locally instead of bouncing out to the live site.