Default stock currency (#10641)

* Fix for useStockFields

- Use default currency

* Ensure default currency is observed

* Specify field default

* Improve import (for ty)

* Update migration files

- Point currency fields to the correct default method

* Unit tests

- Ensure stock item gets correct default currency

* Cleaner generation of default currency value

- Return empty string during migratoins

* Update existing migrations

* Reduce noise

* Ignore "no-matching-overload" rule for ty

* Tweak money_kwargs

src/frontend/src/forms/StockForms.tsx

@@ -124,10 +124,18 @@ export function useStockFields({
     }
   }, [pricing, quantity]);
 
+  // Set the supplier part if provided
   useEffect(() => {
     if (supplierPartId && !supplierPart) setSupplierPart(supplierPartId);
   }, [partInstance, supplierPart, supplierPartId]);
 
+  // Set default currency from global settings
+  useEffect(() => {
+    setPurchasePriceCurrency(
+      globalSettings.getSetting('INVENTREE_DEFAULT_CURRENCY')
+    );
+  }, [globalSettings]);
+
   return useMemo(() => {
     const fields: ApiFormFieldSet = {
       part: {
@@ -248,6 +256,7 @@ export function useStockFields({
       },
       purchase_price_currency: {
         icon: <IconCoins />,
+        default: globalSettings.getSetting('INVENTREE_DEFAULT_CURRENCY'),
         value: purchasePriceCurrency,
         onValueChange: (value) => {
           setPurchasePriceCurrency(value);