feat: add join form

lib/mv_web/components/layouts.ex

@@ -82,7 +82,25 @@ defmodule MvWeb.Layouts do
         </div>
       </div>
     <% else %>
-      <!-- Not logged in -->
+      <!-- Unauthenticated: simple header (logo, club name, language selector; same classes as sidebar header) -->
+      <header class="flex items-center gap-3 p-4 border-b border-base-300 bg-base-100">
+        <img src={~p"/images/mila.svg"} alt="Mila Logo" class="size-8 shrink-0" />
+        <span class="menu-label text-lg font-bold truncate flex-1">
+          {@club_name}
+        </span>
+        <form method="post" action={~p"/set_locale"} class="shrink-0">
+          <input type="hidden" name="_csrf_token" value={Plug.CSRFProtection.get_csrf_token()} />
+          <select
+            name="locale"
+            onchange="this.form.submit()"
+            class="select select-sm focus:outline-none focus:ring-2 focus:ring-primary focus:ring-offset-2"
+            aria-label={gettext("Select language")}
+          >
+            <option value="de" selected={Gettext.get_locale() == "de"}>Deutsch</option>
+            <option value="en" selected={Gettext.get_locale() == "en"}>English</option>
+          </select>
+        </form>
+      </header>
       <main class="px-4 py-8 sm:px-6">
         <div class="mx-auto space-y-4 max-full">
           {render_slot(@inner_block)}