refactor: rename shopLayoutData to storefrontLayoutData

Align Alpine.js base component naming with storefront terminology.
Updated across all storefront JS, templates, and documentation.

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

app/modules/cms/templates/cms/storefront/landing-full.html

@@ -7,7 +7,7 @@
 {% block meta_description %}{{ page.meta_description or store.description or store.name }}{% endblock %}
 
 {# Alpine.js component #}
-{% block alpine_data %}shopLayoutData(){% endblock %}
+{% block alpine_data %}storefrontLayoutData(){% endblock %}
 
 {% block content %}
 <div class="min-h-screen">

app/modules/cms/templates/cms/storefront/landing-modern.html

@@ -7,7 +7,7 @@
 {% block meta_description %}{{ page.meta_description or store.description or store.name }}{% endblock %}
 
 {# Alpine.js component #}
-{% block alpine_data %}shopLayoutData(){% endblock %}
+{% block alpine_data %}storefrontLayoutData(){% endblock %}
 
 {% block content %}
 <div class="min-h-screen">