fix: 修正产品规格值product_spec的显示问题

- subItem.value => subItem.key
- 调整后端CMS的结构，将规格值移入translations中

app/models/mappers/productMapper.ts

@@ -61,12 +61,13 @@ export function toProductSpecGroupView(
 export function toProductSpecView(raw: ProductSpec): ProductSpecView {
   const trans = raw.translations?.[0] ?? {
     key: '',
+    value: '',
   };
 
   return {
     id: raw.id,
     key: trans.key,
-    value: raw.value,
+    value: trans.value,
   };
 }