Synaply

Migrate the Synaply repository schema and Supabase infrastructure to a Supabase Cloud project. Use when Codex needs to deploy `apps/backend/prisma/migrations` and `supabase/migrations` to a remote Supabase database, verify migration status, or repeat the Synaply Cloud cutover workflow after env variables have been configured.

Operate Synaply's project-specific localization workflow for the Next.js + next-intl frontend. Use when translating or updating user-facing copy in `synaply-frontend`, syncing `en`/`zh`/`ko`/`ja` message JSON files, adding a locale, replacing hardcoded strings with translation keys, validating ICU placeholders, or keeping `routing.ts`, `request.ts`, `merge-messages.ts`, and `LanguageSwitcher.tsx` aligned.