Fix total buy calculation related to activities in custom currency

apps/api/src/app/portfolio/portfolio.service.ts

@@ -2126,11 +2126,11 @@ export class PortfolioService {
         .filter(({ isDraft, type }) => {
           return isDraft === false && type === activityType;
         })
-        .map(({ quantity, SymbolProfile, unitPrice }) => {
+        .map(({ currency, quantity, SymbolProfile, unitPrice }) => {
           return new Big(
             this.exchangeRateDataService.toCurrency(
               new Big(quantity).mul(unitPrice).toNumber(),
-              SymbolProfile.currency,
+              currency ?? SymbolProfile.currency,
               userCurrency
             )
           );