Backoffice stage 3: orders and providers, auto-assignment

- Auto-assignment: a new order is offered to the best free provider (same ranking as
  the dispatcher hint); a decline or timeout passes it to the next one; nobody is
  offered the same order twice; after N tries it waits for a dispatcher and the team
  is notified once. The worker retries waiting orders every minute. Settings
  assign.auto / assign.maxAutoOffers (toggle on the Orders page, checkbox in old admin).
- Orders: list by day with groups (need a provider, offered, assigned, in progress,
  done, cancelled), periods and search; order card with progress, provider or ranked
  candidates ("offer" / "pick automatically"), details, checklist and photos,
  history in plain words, client, money (superadmin), payment, status change,
  reschedule (slots or custom time), cancel with fee.
- New order for a client (from the client card or the Orders page): params form,
  address, free slots for 14 days, price with the client's discount.
- Providers: list with rating, orders, declines, low ratings, next order; card with
  quality, ratings, upcoming orders, schedule and districts, admission documents,
  block/unblock with reason, new bot link, money and payouts (superadmin).
- Payout gets paidAt/note/createdById; Provider gets blockedReason/blockedAt/adminNote
  and documents (ProviderDoc).
- Tests for auto-assignment.

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

apps/api/src/routers/backoffice/chats.ts

@@ -82,9 +82,11 @@ export const boChatsRouter = router({
   }),
 
   /** Написать клиенту из карточки: открывает диалог в канале, куда он пишет (или в указанном) */
-  openFor: chatProcedure.input(z.object({ clientId: z.string(), channel: z.enum(CHANNELS).optional() })).mutation(async ({ ctx, input }) => {
-    const channel = input.channel ?? (ctx.channels.length === 1 ? ctx.channels[0] : undefined);
-    const t = await openThreadFor(ctx.svc, { clientId: input.clientId }, channel);
+  openFor: chatProcedure.input(z.object({ clientId: z.string().optional(), providerId: z.string().optional(), channel: z.enum(CHANNELS).optional() })).mutation(async ({ ctx, input }) => {
+    if (!input.clientId && !input.providerId) throw new TRPCError({ code: 'BAD_REQUEST' });
+    // исполнитель пишет только в поддержку
+    const channel = input.providerId ? 'SUPPORT' : (input.channel ?? (ctx.channels.length === 1 ? ctx.channels[0] : undefined));
+    const t = await openThreadFor(ctx.svc, input.providerId ? { providerId: input.providerId } : { clientId: input.clientId! }, channel);
     if (!ctx.channels.includes(t.channel)) throw new TRPCError({ code: 'FORBIDDEN', message: 'ROLE_FORBIDDEN' });
     return { id: t.id };
   }),