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

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

views/partials/sidebar.html.twig

@@ -1,7 +1,7 @@
-<aside>
+<aside aria-label="{{ __('Blog sidebar') }}">
     {% if sidebar.recent_posts is defined and sidebar.recent_posts|length > 0 %}
         <div class="mb-4">
-            <h3 class="h6 text-uppercase fw-semibold" style="letter-spacing: 1.6px">
+            <h3 class="sidebar-heading h6 text-uppercase fw-semibold">
                 {{ __('Recent Posts') }}
             </h3>
             <ul class="list-unstyled">
@@ -19,7 +19,7 @@
     {% endif %}
 
     <div class="mb-4">
-        <h3 class="h6 text-uppercase fw-semibold" style="letter-spacing: 1.6px">
+        <h3 class="sidebar-heading h6 text-uppercase fw-semibold">
             {{ __('Search') }}
         </h3>
         {% include 'partials/search-form.html.twig' %}
@@ -29,7 +29,7 @@
 
     {% if sidebar.tags is defined and sidebar.tags|length > 0 %}
         <div class="mb-4">
-            <h3 class="h6 text-uppercase fw-semibold" style="letter-spacing: 1.6px">
+            <h3 class="sidebar-heading h6 text-uppercase fw-semibold">
                 {{ __('Tags') }}
             </h3>
             <div>