feat(payment): add qrDescription/customerID fields, TTL-based QR polling

- CartPaymentRequest gains qrDescription (brandName > hostname > fallback
  text) and customerID (telegram id)
- QrCreateResponse gains qrTTL; polling window now derived from it
  (min 60s) instead of a fixed 3-minute/36-check cap
- PAYMENT_MAX_CHECKS replaced by PAYMENT_MIN_POLL_SECONDS

src/app/pages/cart/cart.component.ts

@@ -13,8 +13,10 @@ import { getDiscountedPrice, getMainImage, trackByItemId, getBadgeClass, getTran
 import { LangRoutePipe } from '../../pipes/lang-route.pipe';
 import { TranslatePipe } from '../../i18n/translate.pipe';
 import { TranslateService } from '../../i18n/translate.service';
-import { PAYMENT_POLL_INTERVAL_MS, PAYMENT_MAX_CHECKS, PAYMENT_TIMEOUT_CLOSE_MS, LINK_COPIED_DURATION_MS } from '../../config/constants';
+import { PAYMENT_POLL_INTERVAL_MS, PAYMENT_MIN_POLL_SECONDS, PAYMENT_TIMEOUT_CLOSE_MS, LINK_COPIED_DURATION_MS } from '../../config/constants';
 import { IconComponent } from '../../shared/ui/icon/icon.component';
+import { ConfigService } from '../../core/config/config.service';
+import { TenantResolverService } from '../../core/config/tenant-resolver.service';
 
 type PaymentMethod = 'qr' | 'card';
 
@@ -65,10 +67,13 @@ export class CartComponent implements OnDestroy {
   emailSubmitting = signal<boolean>(false);
   paidItems: CartItem[] = [];
   
-  maxChecks = PAYMENT_MAX_CHECKS;
+  maxChecks = Math.ceil(PAYMENT_MIN_POLL_SECONDS / (PAYMENT_POLL_INTERVAL_MS / 1000));
   private pollingSubscription?: Subscription;
   private closeTimeout?: ReturnType<typeof setTimeout>;
 
+  private configService = inject(ConfigService);
+  private tenantResolver = inject(TenantResolverService);
+
   constructor(
     private cartService: CartService,
     private apiService: ApiService,
@@ -243,6 +248,8 @@ export class CartComponent implements OnDestroy {
       redirectUrl: '',
       telegramUsername: this.getTelegramUsername(),
       paymentMethod,
+      qrDescription: this.getPaymentDescription(),
+      customerID: this.getTelegramUserId() ?? undefined,
       items: this.buildPaymentItems(),
     };
 
@@ -266,7 +273,7 @@ export class CartComponent implements OnDestroy {
             this.bankPaymentUrl.set(bankUrl);
 
             this.paymentStatus.set('waiting');
-            this.startPolling();
+            this.startPolling(response.qrTTL);
             if (paymentMethod === 'card') {
               this.openBankPaymentPopup();
             }
@@ -278,16 +285,19 @@ export class CartComponent implements OnDestroy {
         });
   }
 
-  startPolling(): void {
+  startPolling(qrTTL?: number): void {
     this.stopPolling();
     if (!this.paymentId()) {
       this.setPaymentError();
       return;
     }
 
+    const pollSeconds = Math.max(PAYMENT_MIN_POLL_SECONDS, (qrTTL ?? 0) * 60);
+    this.maxChecks = Math.ceil(pollSeconds / (PAYMENT_POLL_INTERVAL_MS / 1000));
+
     this.pollingSubscription = interval(PAYMENT_POLL_INTERVAL_MS)
       .pipe(
-        take(this.maxChecks), // maximum 36 checks (3 minutes)
+        take(this.maxChecks), // qrTTL minutes from create response, minimum 1 minute
         exhaustMap(() => {
           const statusRequest = this.selectedPaymentMethod() === 'card'
             ? this.apiService.checkCartCardPaymentStatus(this.paymentId())
@@ -568,6 +578,20 @@ export class CartComponent implements OnDestroy {
     return this.getTelegramUserId() ?? `web_${Date.now()}`;
   }
 
+  private getPaymentDescription(): string {
+    const brandName = this.configService.getBootstrapSnapshot()?.branding?.brandName?.trim();
+    if (brandName) {
+      return brandName;
+    }
+
+    const hostname = this.tenantResolver.getHostname();
+    if (hostname && !this.tenantResolver.isLocalhost()) {
+      return hostname;
+    }
+
+    return 'Покупка на Маркетплейсе';
+  }
+
   private generateOrderId(): string {
     const timestamp = Date.now();
     const random = Math.random().toString(36).substring(2, 8);