Count to location (#12019)

* Add "location" field to StockCountSerializer

* Adjust location on stock count

* Add unit tests

* Add docs

* Update API and CHANGELOG

src/frontend/src/forms/StockForms.tsx

@@ -967,6 +967,9 @@ function stockCountFields(items: any[]): ApiFormFieldSet {
 
   const initialValue = mapAdjustmentItems(items);
 
+  // Extract all location values from the items
+  const locations = [...new Set(items.map((item) => item.location))];
+
   const fields: ApiFormFieldSet = {
     items: {
       field_type: 'table',
@@ -990,6 +993,12 @@ function stockCountFields(items: any[]): ApiFormFieldSet {
         { title: t`Actions` }
       ]
     },
+    location: {
+      value: locations.length === 1 ? locations[0] : undefined,
+      filters: {
+        structural: false
+      }
+    },
     notes: {}
   };