fix issues in core

core/payments/application/use-cases/GetSponsorBillingUseCase.ts

@@ -149,8 +149,8 @@ export class GetSponsorBillingUseCase
     if (invoices.length === 0) return 0;
 
     const sorted = [...invoices].sort((a, b) => a.date.localeCompare(b.date));
-    const first = new Date(sorted[0].date);
-    const last = new Date(sorted[sorted.length - 1].date);
+    const first = new Date(sorted[0]!.date);
+    const last = new Date(sorted[sorted.length - 1]!.date);
 
     const months = this.monthDiff(first, last) || 1;
     const total = sorted.reduce((sum, inv) => sum + inv.totalAmount, 0);

core/payments/application/use-cases/index.ts

@@ -0,0 +1,13 @@
+export * from './AwardPrizeUseCase';
+export * from './CreatePaymentUseCase';
+export * from './CreatePrizeUseCase';
+export * from './DeletePrizeUseCase';
+export * from './GetMembershipFeesUseCase';
+export * from './GetPaymentsUseCase';
+export * from './GetPrizesUseCase';
+export * from './GetSponsorBillingUseCase';
+export * from './GetWalletUseCase';
+export * from './ProcessWalletTransactionUseCase';
+export * from './UpdateMemberPaymentUseCase';
+export * from './UpdatePaymentStatusUseCase';
+export * from './UpsertMembershipFeeUseCase';