refactor: migrer les partials vers le contenu localisé

src/_includes/partials/nav.njk

@@ -1,11 +1,11 @@
 <nav>
     <div class="nav-container">
         <a href="/" class="logo">
-            <img src="/assets/images/logo-512x512.png" alt="{{ site.shortName }} Logo" class="logo-image">
-            <span>{{ site.shortName }}</span>
+            <img src="/assets/images/logo-512x512.png" alt="{{ t.site.shortName }} Logo" class="logo-image">
+            <span>{{ t.site.shortName }}</span>
         </a>
         <ul class="nav-links">
-            {% for item in navigation %}
+            {% for item in t.navigation %}
             <li>
                 <a href="{{ item.url }}"{% if item.external %} target="_blank"{% endif %}>
                     {{ item.text }}
@@ -13,7 +13,12 @@
             </li>
             {% endfor %}
         </ul>
-        <button id="theme-toggle" class="theme-toggle" aria-label="Changer de thème" title="Changer de thème">
+        {% if locale == 'en' %}
+        <a href="/" class="lang-switch" onclick="localStorage.setItem('oki-lang-pref','fr')">{{ t.ui.lang_switch_label }}</a>
+        {% else %}
+        <a href="/en/" class="lang-switch" onclick="localStorage.setItem('oki-lang-pref','en')">{{ t.ui.lang_switch_label }}</a>
+        {% endif %}
+        <button id="theme-toggle" class="theme-toggle" aria-label="{{ t.ui.theme_toggle }}" title="{{ t.ui.theme_toggle }}">
             <span class="theme-icon theme-icon-dark">🌙</span>
             <span class="theme-icon theme-icon-light">☀️</span>
         </button>