Add i18n language switcher and localized URL routing

mandelstudio/templates/oxyan/headers/partials/carbasa-user-bar.html

@@ -0,0 +1,25 @@
+{% load i18n %}
+<div class="header-right">
+    <form action="{% url set_language %}" method="post" class="language-switcher-form d-inline-flex align-items-center me-2" aria-label="Language switcher">
+        {% csrf_token %}
+        <input name="next" type="hidden" value="{{ request.get_full_path }}">
+        <label for="header-language-switcher" class="visually-hidden">{% trans "Language" %}</label>
+        <select id="header-language-switcher" name="language" class="form-select form-select-sm" style="width:auto; min-width:84px;" onchange="this.form.submit()">
+            {% get_current_language as LANGUAGE_CODE %}
+            {% get_available_languages as LANGUAGES %}
+            {% for code, name in LANGUAGES %}
+                <option value="{{ code }}" {% if code == LANGUAGE_CODE %}selected{% endif %}>{{ code|upper }}</option>
+            {% endfor %}
+        </select>
+    </form>
+
+    <a tabindex="0" aria-label="Open Search" role="search" class="search-toggler user-button menu-circle">
+        <i class="fa fa-search"></i>
+    </a>
+    <a href="{% url customer:summary %}" aria-label="{% trans Customer summary %}" class="user-button menu-circle"><i class="fa fa-user-solid"></i></a>
+    {% include oxyan/headers/partials/mini_basket.html %}
+</div>
+
+<div class="alert-messages-header" aria-live="polite">
+    {% include "oscar/partials/alert_messages.html" with messages=messages %}
+</div>