Backoffice stage 5: products, broadcasts, activity log, settings

- Products: services with full setup — content (name, description, extras names
  in 5 languages via text overrides), price tiers and extras, booking window,
  late-cancel fee, on/off, checklist; category discounts by membership level;
  membership plan prices; promo codes; relocation steps and documents.
- Text overrides: TextOverride table on top of the i18n files; API, bots and the
  worker reload them every minute, mini apps fetch public.texts at start.
- Promo codes applied to orders (admin new-order form and client API): not
  stacked with membership discount — the larger wins; once per client; validity,
  limit and categories.
- Broadcasts to the client bot by any client filter, per-language texts with
  Russian fallback, test to yourself, ~25 msg/s, per-recipient status, resume after
  worker restart, history with progress and stop.
- Activity log (who/when/what, filters, details) and Settings page with all
  owner settings grouped, plus payment methods.
- Tests for promo codes and text overrides.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

packages/db/prisma/schema.prisma

@@ -706,6 +706,10 @@ model PromoCode {
   validFrom   DateTime?
   validUntil  DateTime?
   active      Boolean    @default(true)
+  /// для команды: откуда код (рассылка, блогер, партнёр)
+  note        String?
+  /// на какие направления действует; пусто — на все
+  categories  CategoryCode[] @default([])
   createdAt   DateTime   @default(now())
 
   uses PromoCodeUse[]
@@ -1369,3 +1373,65 @@ model SalesTask {
 
   @@index([assigneeId, doneAt, dueAt])
 }
+
+// ───────────── Продукты, рассылки (этап 5) ─────────────
+
+/// Текст, изменённый в админке поверх переводов из packages/i18n (название и описание услуги, пункт чек-листа…).
+/// Пустой — не храним: действует стандартный перевод
+model TextOverride {
+  key         String
+  locale      Locale
+  value       String
+  updatedById String?
+  updatedAt   DateTime @updatedAt
+
+  @@id([key, locale])
+}
+
+enum BroadcastStatus {
+  SENDING
+  DONE
+  CANCELLED
+}
+
+enum BroadcastRecipientStatus {
+  PENDING
+  SENT
+  /// заблокировал бота или ни разу его не открывал
+  BLOCKED
+  FAILED
+}
+
+/// Рассылка клиентам в бот по сегменту (фильтры списка клиентов). Текст — на языке клиента, фолбэк — русский
+model Broadcast {
+  id          String          @id @default(cuid())
+  /// { ru, en, zh, hy, es }
+  texts       Json
+  /// кнопка «Открыть приложение» под сообщением
+  appButton   Boolean         @default(true)
+  /// фильтры списка клиентов, по которым собрали получателей
+  filters     Json
+  status      BroadcastStatus @default(SENDING)
+  total       Int             @default(0)
+  sent        Int             @default(0)
+  blocked     Int             @default(0)
+  failed      Int             @default(0)
+  createdById String?
+  createdAt   DateTime        @default(now())
+  finishedAt  DateTime?
+
+  recipients BroadcastRecipient[]
+}
+
+model BroadcastRecipient {
+  id          String                   @id @default(cuid())
+  broadcastId String
+  broadcast   Broadcast                @relation(fields: [broadcastId], references: [id], onDelete: Cascade)
+  clientId    String
+  status      BroadcastRecipientStatus @default(PENDING)
+  error       String?
+  sentAt      DateTime?
+
+  @@unique([broadcastId, clientId])
+  @@index([broadcastId, status])
+}