Notifications — Code Map

API

File	Role
`apps/api/src/notifications/notifications.module.ts`	Global module; registers `RESEND_CLIENT`, `ScheduleModule`, exports services
`apps/api/src/notifications/email.service.ts`	Thin wrapper over Resend; from-address management; test mode in-memory log
`apps/api/src/notifications/notification-scheduler.service.ts`	Cron jobs: `handleClassReminders`, `handleExpirationWarnings`
`apps/api/src/notifications/cancellation-notifications.service.ts`	Booking cancellation emails (called from `bookings` module)
`apps/api/src/notifications/constants.ts`	DI token `RESEND_CLIENT`
`apps/api/src/notifications/email-types.ts`	Type definitions for email payloads
`apps/api/src/notifications/templates/`	`class-reminder.ts`, `expiration-warning.ts`, `payment-reminder.ts`, `cancellation.ts`
`apps/api/src/notifications/notification-scheduler.service.unit.spec.ts`	Tests
`apps/api/src/common/crons-enabled.ts`	`cronsEnabled()` gate
`apps/api/src/common/cron-retry.ts`	`runWithRetry` helper

Env	Purpose
`RESEND_API_KEY`	Required at boot
`RESEND_FROM_ADDRESS`	Optional; defaults to `FitKit <noreply@fitkit.fit>`
`CRONS_ENABLED` or equivalent	Toggle; off in dev

Bookings, subscriptions, class sessions are queried; no schema lives in this module.