Fix currency rendering (#9308)

- Closes https://github.com/inventree/InvenTree/issues/9300

src/frontend/src/pages/purchasing/PurchaseOrderDetail.tsx

@@ -191,7 +191,7 @@ export default function PurchaseOrderDetail() {
         label: t`Total Cost`,
         value_formatter: () => {
           return formatCurrency(order?.total_price, {
-            currency: order?.order_currency ?? order?.supplier_detail?.currency
+            currency: order?.order_currency || order?.supplier_detail?.currency
           });
         }
       }

src/frontend/src/pages/sales/ReturnOrderDetail.tsx

@@ -155,7 +155,7 @@ export default function ReturnOrderDetail() {
         label: t`Total Cost`,
         value_formatter: () => {
           return formatCurrency(order?.total_price, {
-            currency: order?.order_currency ?? order?.customer_detail?.currency
+            currency: order?.order_currency || order?.customer_detail?.currency
           });
         }
       }

src/frontend/src/tables/purchasing/PurchaseOrderTable.tsx

@@ -135,7 +135,7 @@ export function PurchaseOrderTable({
         sortable: true,
         render: (record: any) => {
           return formatCurrency(record.total_price, {
-            currency: record.order_currency ?? record.supplier_detail?.currency
+            currency: record.order_currency || record.supplier_detail?.currency
           });
         }
       },

src/frontend/src/tables/sales/ReturnOrderTable.tsx

@@ -144,7 +144,7 @@ export function ReturnOrderTable({
         sortable: true,
         render: (record: any) => {
           return formatCurrency(record.total_price, {
-            currency: record.order_currency ?? record.customer_detail?.currency
+            currency: record.order_currency || record.customer_detail?.currency
           });
         }
       }

src/frontend/src/tables/sales/SalesOrderTable.tsx

@@ -179,7 +179,7 @@ export function SalesOrderTable({
         sortable: true,
         render: (record: any) => {
           return formatCurrency(record.total_price, {
-            currency: record.order_currency ?? record.customer_detail?.currency
+            currency: record.order_currency || record.customer_detail?.currency
           });
         }
       }