fix: update category selection logic to use code instead of id

app/routes/_news.category.$code.tsx

@@ -6,7 +6,7 @@ import type { Route } from './+types/_news.category.$code'
 export const loader = async ({ params }: Route.LoaderArgs) => {
   const { data: categoriesData } = await getCategories()
   const categoryData = categoriesData.find(
-    (category) => category.id === params.id,
+    (category) => category.code === params.code,
   )
   return { categoryData }
 }