v0.3.0 - Polish: accessibility, security, performance, RTL, French translation

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

views/pages/hero.html.twig

@@ -5,7 +5,7 @@
 {% block content %}
 <section class="bg-primary text-white py-5 mb-5{% if post.thumbnail %} position-relative overflow-hidden{% endif %}">
     {% if post.thumbnail %}
-        <div class="position-absolute top-0 start-0 w-100 h-100" style="background: url('{{ post.thumbnail }}') center/cover no-repeat; opacity: 0.3;"></div>
+        <div class="hero-overlay position-absolute top-0 start-0 w-100 h-100" style="background-image: url('{{ post.thumbnail|e('html_attr') }}');"></div>
     {% endif %}
     <div class="container position-relative py-5 text-center">
         <h1 class="display-4 fw-bold">{{ post.title }}</h1>