Add COD-in-transit summary and received tab to the dashboard

- GET /orders/summary: count and sum of cash-on-delivery for parcels not
  yet picked up (excludes received, refused, deleted/unknown TTNs, paid COD);
  shown as a card above the tabs.
- New «Полученные» tab: orders with NP received codes (9, 10, 11, 106) move
  there automatically, regardless of receipt; 106 is now a final status.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

frontend/src/features/orders/types.ts

@@ -6,7 +6,7 @@
 import type { ReceiptStatus } from '@/features/receipts/types'
 
 /** Вкладка дашборда (`OrderTab` в backend/app/services/orders.py). */
-export type OrderTab = 'no_receipt' | 'has_receipt' | 'refused'
+export type OrderTab = 'no_receipt' | 'has_receipt' | 'received' | 'refused'
 
 export interface OrderGood {
   id: string
@@ -62,3 +62,9 @@ export interface OrderUpdate {
   total_amount: string
   goods: OrderGoodUpdate[]
 }
+
+/** Ответ `GET /orders/summary` (`OrdersSummaryOut`). */
+export interface OrdersSummary {
+  cod_in_transit_count: number
+  cod_in_transit_amount: string
+}

frontend/src/features/orders/useOrders.ts

@@ -1,11 +1,13 @@
 import { useQuery } from '@tanstack/react-query'
 
-import { getOrders } from '@/api/orders'
+import { getOrders, getOrdersSummary } from '@/api/orders'
 import type { OrderTab } from '@/features/orders/types'
 
 /** Пока чек отправляется в Checkbox — опрашиваем часто, иначе статусы чеков обновляет worker раз в минуту. */
 const PENDING_POLL_MS = 3_000
 const RECEIPTS_POLL_MS = 30_000
+// Статусы NP обновляет worker раз в минуту — чаще сводку опрашивать незачем.
+const SUMMARY_POLL_MS = 60_000
 
 export function useOrders(tab: OrderTab) {
   return useQuery({
@@ -17,3 +19,12 @@ export function useOrders(tab: OrderTab) {
     },
   })
 }
+
+export function useOrdersSummary() {
+  return useQuery({
+    // Под ключом ['orders', ...] — чтобы invalidateQueries(['orders']) обновлял и сводку.
+    queryKey: ['orders', 'summary'],
+    queryFn: getOrdersSummary,
+    refetchInterval: SUMMARY_POLL_MS,
+  })
+}