Email Notifications

Notification preferences include an email channel and notification rows store an emailDelivery state. The starter does not send notification emails automatically.

Existing transactional emails remain separate:

• magic links
• organization invitations
• sensitive-action verification codes

To add email delivery:

1. Use packages/backend/convex/email/index.ts.
2. Create notification rows first.
3. Schedule provider delivery from a Convex action or internal background path.
4. Patch emailDelivery to sent, failed, or skipped.
5. Do not block the user-facing mutation on the email provider call.

This keeps in-app notifications reliable even when email is not configured.