fix(registry): initialize sample user directly in Follow page

Author: pablof7z

svelte/registry/src/routes/(app)/components/follow/+page.svelte

@@ -21,7 +21,11 @@
     title: 'Follow',
     description: 'Follow buttons for Nostr users and topics'
   };
-  let sampleUser = $state<NDKUser | undefined>();
+
+  // Initialize sample user directly with npub
+  let sampleUser = $state<NDKUser | undefined>(
+    NDKUser.fromNpub("npub1l2vyh47mk2p0qlsku7hg0vn29faehy9hy34ygaclpn66ukqp3afqutajft")
+  );
 
   // Components section configuration
   const componentsSection = {