Add refusals tab to the order dashboard

Orders whose Nova Poshta status is a refusal (102/103/105/108) now show
only under «Отказы», whether or not they have a receipt. GET /orders takes
tab=no_receipt|has_receipt|refused instead of has_receipt. NP statuses are
also polled for orders that already have a receipt, until NP reports a
final status.

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

frontend/src/features/orders/types.ts

@@ -5,6 +5,9 @@
 
 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 interface OrderGood {
   id: string
   sku: string

frontend/src/features/orders/useOrders.ts

@@ -1,18 +1,19 @@
 import { useQuery } from '@tanstack/react-query'
 
 import { getOrders } 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
 
-export function useOrders(hasReceipt: boolean) {
+export function useOrders(tab: OrderTab) {
   return useQuery({
-    queryKey: ['orders', hasReceipt],
-    queryFn: () => getOrders(hasReceipt),
+    queryKey: ['orders', tab],
+    queryFn: () => getOrders(tab),
     refetchInterval: (query) => {
       if (query.state.data?.some((order) => order.receipt_status === 'pending')) return PENDING_POLL_MS
-      return hasReceipt ? RECEIPTS_POLL_MS : false
+      return tab === 'has_receipt' ? RECEIPTS_POLL_MS : false
     },
   })
 }