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>

packages/i18n/locales/en.json

@@ -871,7 +871,8 @@
       "file": "file",
       "chatAssigned": "{{by}} passed you a conversation: {{name}}",
       "order": "Order #{{number}}",
-      "noOrder": "No current order"
+      "noOrder": "No current order",
+      "autoFailed": "No free provider found for order #{{number}} — please assign manually."
     },
     "partner": {
       "valid": "{{name}} — {{level}}, card is valid",
@@ -1269,7 +1270,9 @@
       "residence_escortFrom": "Residence permit: support from, AMD",
       "residence_stateFee": "Residence permit: state fee (1 year), AMD",
       "transfer_standardPrice": "Transfer “Standard”, AMD",
-      "transfer_premiumPrice": "Transfer “Premium”, AMD"
+      "transfer_premiumPrice": "Transfer “Premium”, AMD",
+      "assign_auto": "Assign orders automatically",
+      "assign_maxAutoOffers": "How many providers to try automatically"
     },
     "presets": {
       "add": "Add preset",