fix(i18n): use get_translated_description() in platform base template

The footer and meta description tag used platform.description (raw column)
instead of platform.get_translated_description(), so DE and LB translations
were never displayed. FR/EN appeared to work because the base description
field was synced from the default language on admin save.

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

app/templates/platform/base.html

@@ -10,7 +10,7 @@
     <title>{% block title %}{{ platform.name if platform else 'Wizard' }}{% endblock %}</title>
 
     {# SEO Meta Tags #}
-    <meta name="description" content="{% block meta_description %}{{ platform.description if platform else '' }}{% endblock %}">
+    <meta name="description" content="{% block meta_description %}{{ platform.get_translated_description(current_language|default('fr'), platform.default_language|default('fr')) if platform else '' }}{% endblock %}">
     <meta name="keywords" content="{% block meta_keywords %}letzshop, order management, oms, luxembourg, e-commerce, invoicing, inventory{% endblock %}">
 
     {# Favicon #}
@@ -182,7 +182,7 @@
                         </span>
                     </div>
                     <p class="text-gray-600 dark:text-gray-400 text-sm max-w-md">
-                        {{ platform.description if platform else '' }}
+                        {{ platform.get_translated_description(current_language|default('fr'), platform.default_language|default('fr')) if platform else '' }}
                     </p>
                 </div>