refactor: Replace hardcoded domain with SITE_URL constant across metadata and schema definitions for improved configurability.

app/sitemap.ts

@@ -1,10 +1,11 @@
+import { config } from '@/lib/config';
 import { MetadataRoute } from 'next';
 import { getAllProducts } from '@/lib/mdx';
 import { getAllPosts } from '@/lib/blog';
 import { getAllPages } from '@/lib/pages';
 
 export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
-  const baseUrl = 'https://klz-cables.com';
+  const baseUrl = config.baseUrl || 'https://klz-cables.com';
   const locales = ['de', 'en'];
 
   const routes = [
@@ -38,7 +39,8 @@ export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
       // We need to find the category for the product to build the URL
       // In this project, products are under /products/[category]/[slug]
       // The category is in product.frontmatter.categories
-      const category = product.frontmatter.categories[0]?.toLowerCase().replace(/\s+/g, '-') || 'other';
+      const category =
+        product.frontmatter.categories[0]?.toLowerCase().replace(/\s+/g, '-') || 'other';
       sitemapEntries.push({
         url: `${baseUrl}/${locale}/products/${category}/${product.slug}`,
         lastModified: new Date(),