feat(payment): add customerID field, TTL-based QR polling

- POST /qr body gains customerID (telegram id), qrDescription now
  guaranteed non-empty (fallback text when note is blank)
- CreateQrResponse gains qrTTL; polling now bounded by it (min 60s)
  instead of running unbounded via setInterval

src/app/pages/create-page/create-page.ts

@@ -33,6 +33,7 @@ interface CreateQrResponse {
   nspkurl?: string; // actual field name in real responses
   qrUrl?: string;
   status?: string; // e.g. "REGISTERED"
+  qrTTL?: number;
 }
 
 interface QrStatusResponse {
@@ -44,16 +45,18 @@ interface QrStatusResponse {
   selector: 'app-create-page',
   imports: [FormsModule, TranslatePipe],
   templateUrl: './create-page.html',
-  styleUrl: './create-page.scss'
+  styleUrl: './create-page.scss',
 })
 export class CreatePage {
   private http = inject(HttpClient);
   private i18n = inject(TranslationService);
   private readonly sites: Record<string, string> = {
-    '51': 'fastcheck.store'
+    '51': 'fastcheck.store',
   };
 
-  private t(key: string): string { return this.i18n.translate(key); }
+  private t(key: string): string {
+    return this.i18n.translate(key);
+  }
 
   // Limits – updated from settings API on init.
   minAmount = signal<number>(30);
@@ -84,6 +87,9 @@ export class CreatePage {
   qrStatus = signal<string>('');
   paymentDone = signal<boolean>(false);
   private pollHandle: ReturnType<typeof setInterval> | null = null;
+  private static readonly POLL_INTERVAL_MS = 5000;
+  private static readonly MIN_POLL_SECONDS = 60;
+  private pollChecksRemaining = 0;
 
   /** Auth credentials passed by the host page as URL params. */
   private get authKey(): string {
@@ -126,7 +132,7 @@ export class CreatePage {
         } else {
           this.lockedAmount.set(null);
         }
-      }
+      },
     });
   }
 
@@ -137,7 +143,9 @@ export class CreatePage {
       return;
     }
     if (val !== null && val > this.maxAmount()) {
-      this.error.set(`${this.t('errors.invalid_amount')} (макс. ${this.maxAmount().toLocaleString('ru')} ₽)`);
+      this.error.set(
+        `${this.t('errors.invalid_amount')} (макс. ${this.maxAmount().toLocaleString('ru')} ₽)`,
+      );
       return;
     }
 
@@ -162,12 +170,13 @@ export class CreatePage {
           ...(val !== null ? { amount: val } : {}),
           currency: this.currency(),
           partnerqrID,
-          qrDescription: this.note().trim(),
+          qrDescription: this.note().trim() || 'Покупка на Маркетплейсе',
+          customerID: this.userId,
           Userid: this.userId,
           Reference: this.reference,
-          RedirectUrl: `https://fastcheck.store?id=fast-c202-4062-bcfb-8b4c8cc59adc`
+          RedirectUrl: `https://fastcheck.store?id=fast-c202-4062-bcfb-8b4c8cc59adc`,
         },
-        { headers }
+        { headers },
       )
       .subscribe({
         next: (res) => {
@@ -187,7 +196,7 @@ export class CreatePage {
               ? `https://api.qrserver.com/v1/create-qr-code/?size=256x256&margin=8&data=${encodeURIComponent(nspkUrl)}`
               : (res.qrUrl ?? null);
             this.qrImageUrl.set(qrData);
-            if (qrId) this.startPolling(qrId);
+            if (qrId) this.startPolling(qrId, res?.qrTTL);
           } else {
             this.error.set(this.t('errors.payment_failed'));
           }
@@ -196,15 +205,30 @@ export class CreatePage {
           this.loading.set(false);
           const msg: string | undefined = err?.error?.message;
           this.error.set(msg ?? this.t('errors.lookup_failed'));
-        }
+        },
       });
   }
 
-  private startPolling(qrId: string): void {
+  private startPolling(qrId: string, qrTTL?: number): void {
     this.stopPolling();
     this.qrPolling.set(true);
+
+    const pollSeconds = Math.max(CreatePage.MIN_POLL_SECONDS, (qrTTL ?? 0) * 60);
+    this.pollChecksRemaining = Math.ceil(pollSeconds / (CreatePage.POLL_INTERVAL_MS / 1000));
+
     this.pollHandle = setInterval(() => {
-      this.http.get<QrStatusResponse>(`${QR_VITANOVA_API}/qr/dynamic/${encodeURIComponent(this.partnerqrID)}/${qrId}`)
+      if (this.pollChecksRemaining <= 0) {
+        this.stopPolling();
+        this.error.set(this.t('errors.payment_failed'));
+        this.qrImageUrl.set(null);
+        return;
+      }
+      this.pollChecksRemaining -= 1;
+
+      this.http
+        .get<QrStatusResponse>(
+          `${QR_VITANOVA_API}/qr/dynamic/${encodeURIComponent(this.partnerqrID)}/${qrId}`,
+        )
         .subscribe({
           next: (res) => {
             const st = res?.status ?? '';
@@ -221,9 +245,9 @@ export class CreatePage {
           error: () => {
             this.closeQr();
             this.error.set('оплата не прошла');
-          }
+          },
         });
-    }, 5000);
+    }, CreatePage.POLL_INTERVAL_MS);
   }
 
   private stopPolling(): void {
@@ -268,7 +292,7 @@ export class CreatePage {
       .post(`https://fastcheck.store/api/fastcheck/settings/${encodeURIComponent(id)}`, paidQr)
       .subscribe({
         next: () => this.redirectToSource(id),
-        error: () => this.redirectToSource(id)
+        error: () => this.redirectToSource(id),
       });
   }