frontend error management enhancement

app/templates/shop/errors/404.html

@@ -0,0 +1,33 @@
+{% extends "shop/errors/base.html" %}
+
+{% block icon %}🔍{% endblock %}
+
+{% block title %}404 - Page Not Found{% endblock %}
+
+{% block content %}
+{% if vendor and theme and theme.branding and theme.branding.logo %}
+<img src="{{ theme.branding.logo }}" alt="{{ vendor.name }}" class="vendor-logo">
+{% endif %}
+
+<div class="error-icon">🔍</div>
+<div class="status-code">404</div>
+<div class="status-name">Page Not Found</div>
+<div class="error-message">
+    Sorry, we couldn't find the page you're looking for. The product or page may have been moved or is no longer available.
+</div>
+
+<div class="action-buttons">
+    <a href="/" class="btn btn-primary">Continue Shopping</a>
+    <a href="/products" class="btn btn-secondary">View All Products</a>
+</div>
+
+<div class="support-link">
+    Can't find what you're looking for? <a href="/contact">Contact us</a> and we'll help you find it.
+</div>
+
+{% if vendor %}
+<div class="vendor-info">
+    {{ vendor.name }}
+</div>
+{% endif %}
+{% endblock %}