Add Mailpit email transport

README.md

@@ -11,7 +11,8 @@ beenvoice/
 │   ├── mobile/          # Expo Router mobile app and iOS widgets
 │   └── worker/          # PostgreSQL-backed scheduler and background jobs
 ├── packages/
-│   └── domain/          # Platform-neutral shared rules and parsing
+│   ├── domain/          # Platform-neutral shared rules and parsing
+│   └── email/           # Resend and SMTP/Mailpit delivery adapter
 ├── Dockerfile
 ├── docker-compose*.yml
 ├── package.json
@@ -43,6 +44,7 @@ bun run lint
 bun run test
 bun run build
 bun run check
+bun run email:preview    # sends a PDF-bearing message to local Mailpit
 ```
 
 Run an app-specific command with a workspace filter:
@@ -72,6 +74,7 @@ The root Dockerfile installs the frozen Bun workspace lockfile and exposes separ
 - [Mobile architecture](./apps/mobile/docs/ARCHITECTURE.md)
 - [Worker architecture](./apps/worker/README.md)
 - [Shared domain package](./packages/domain/README.md)
+- [Email delivery package](./packages/email/README.md)
 
 ## Product concepts