New

• dashboard: add double opt-in toggle to contact list detail page
• embed: add default styles to signup form embed.js
• signup-forms: add customizable messages for form localization
• dashboard: add inbound email toggle to domain detail page
• design: European Editorial redesign with anti-slop rules
• smtp: switch bounce server to port 25 natively
• smtp: unified SMTP router for all inbound mail on port 25

Fixed

• api: allow any origin for subscribe embed endpoints
• admin: allow admin to change own plan and fix domain deletion FK
• db: repair domain deletion FK on partitioned emails table
• dashboard: cascade plan change to sub-accounts in admin panel
• ci: correct runner label for update-k8s-tags job
• dashboard: replace oversized checkmark animation with text-only copy feedback