SEO: Fix structured data validation errors, delete static sitemap, and update indexing scripts

src/components/Breadcrumbs.tsx

@@ -8,11 +8,12 @@ export interface BreadcrumbItem {
 
 interface BreadcrumbsProps {
   items: BreadcrumbItem[];
+  className?: string;
 }
 
-export default function Breadcrumbs({ items }: BreadcrumbsProps) {
+export default function Breadcrumbs({ items, className }: BreadcrumbsProps) {
   return (
-    <nav aria-label="Breadcrumb" className="mb-6">
+    <nav aria-label="Breadcrumb" className={`mb-6 ${className || ''}`}>
       <ol className="flex items-center space-x-2 text-sm text-gray-600">
         {items.map((item, index) => (
           <li key={item.url} className="flex items-center">