refactor: simplify order status model — remove DELIVERY_FEE_ADJUSTMENT and PAYMENT_VERIFICATION

- Add deliveryFeeLocked field to Order model
- Remove DELIVERY_FEE_ADJUSTMENT and PAYMENT_VERIFICATION statuses (11→8)
- 3 order paths: delivery+online (locked→unlocked→paid), pickup+online (unlocked→paid), pickup+on_pickup (direct to in_progress)
- Update checkout to use PENDING_PAYMENT + deliveryFeeLocked
- Update payment flow to stay in PENDING_PAYMENT until admin confirms
- Update admin UI to use deliveryFeeLocked instead of status check
- Update client payment UI with new deliveryFeeLocked logic

client/src/shared/lib/order-status-labels.ts

@@ -2,9 +2,7 @@
 export function orderStatusLabelRu(code: string): string {
   const map: Record<string, string> = {
     DRAFT: 'Черновик',
-    DELIVERY_FEE_ADJUSTMENT: 'Корректировка стоимости доставки',
     PENDING_PAYMENT: 'Ожидает оплаты',
-    PAYMENT_VERIFICATION: 'Проверка оплаты',
     PAID: 'Оплачен',
     IN_PROGRESS: 'В работе',
     SHIPPED: 'Отправлен',