fix: replace Waypoint placeholder URLs with generic ones

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: vepsala

index.html

@@ -6,7 +6,7 @@
     <link rel="icon" type="image/png" sizes="32x32" href="/src/favicon/favicon-32x32.png" />
     <link rel="icon" type="image/png" sizes="16x16" href="/src/favicon/favicon-16x16.png" />
     <meta name="viewport" content="width=900" />
-    <meta name="description" content="EmailBuilder.js interactive playground. Brought to you by Waypoint." />
+    <meta name="description" content="Email Template Editor interactive playground." />
     <title>Email Template Editor</title>
     <style>
       html {

src/editor/blocks/helpers/editor-children-ids/add-block-menu/buttons.tsx

@@ -59,7 +59,7 @@ export const BUTTONS: TButtonProps[] = [
       data: {
         props: {
           text: 'Button',
-          url: 'https://www.usewaypoint.com',
+          url: 'https://example.com',
         },
         style: { padding: { top: 16, bottom: 16, left: 24, right: 24 } },
       },
@@ -72,7 +72,7 @@ export const BUTTONS: TButtonProps[] = [
       type: 'Image',
       data: {
         props: {
-          url: 'https://assets.usewaypoint.com/sample-image.jpg',
+          url: 'https://placehold.co/600x400/EEE/999?text=Sample+Image',
           alt: 'Sample product',
           contentAlignment: 'middle',
           linkHref: null,