feat: SEO schema, Word Count Goals, Internal Linking targets, and Admin UI updates

frontend/src/layouts/BaseLayout.astro

@@ -8,6 +8,7 @@ interface Props {
   globals?: Globals;
   navigation?: Navigation[];
   canonical?: string;
+  schemaJson?: Record<string, any>;
 }
 
 const { 
@@ -16,7 +17,8 @@ const {
   image,
   globals,
   navigation = [],
-  canonical
+  canonical,
+  schemaJson
 } = Astro.props;
 
 const siteUrl = Astro.url.origin;
@@ -63,6 +65,11 @@ const ogImage = image || globals?.logo || '';
     <!-- Head Scripts -->
     {globals?.scripts_head && <Fragment set:html={globals.scripts_head} />}
     
+    <!-- JSON-LD Schema -->
+    {schemaJson && (
+      <script type="application/ld+json" set:html={JSON.stringify(schemaJson)} />
+    )}
+    
     <!-- Styles -->
     <style is:global>
       @import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');