feat(MED-97): update cart flow for using benefits

app/home/(user)/_lib/server/balance-actions.ts

@@ -0,0 +1,13 @@
+'use server';
+
+import { AccountBalanceService, AccountBalanceSummary } from '@kit/accounts/services/account-balance.service';
+
+export async function getAccountBalanceSummary(accountId: string): Promise<AccountBalanceSummary | null> {
+  try {
+    const service = new AccountBalanceService();
+    return await service.getBalanceSummary(accountId);
+  } catch (error) {
+    console.error('Error getting account balance summary:', error);
+    return null;
+  }
+}