fix: translation of login page

lib/mv_web/controllers/join_confirm_controller.ex

@@ -2,8 +2,9 @@ defmodule MvWeb.JoinConfirmController do
   @moduledoc """
   Handles GET /confirm_join/:token for the public join flow (double opt-in).
 
-  Calls a configurable callback (default Mv.Membership) so tests can stub the
-  dependency. Public route; no authentication required.
+  Renders a full HTML page with public header and hero layout (success, expired,
+  or invalid). Calls a configurable callback (default Mv.Membership) so tests can
+  stub the dependency. Public route; no authentication required.
   """
   use MvWeb, :controller
 
@@ -26,20 +27,36 @@ defmodule MvWeb.JoinConfirmController do
 
   defp success_response(conn) do
     conn
-    |> put_resp_content_type("text/html")
-    |> send_resp(200, gettext("Thank you, we have received your request."))
+    |> assign_confirm_assigns(:success)
+    |> put_view(MvWeb.JoinConfirmHTML)
+    |> render("confirm.html")
   end
 
   defp expired_response(conn) do
     conn
-    |> put_resp_content_type("text/html")
-    |> send_resp(200, gettext("This link has expired. Please submit the form again."))
+    |> assign_confirm_assigns(:expired)
+    |> put_view(MvWeb.JoinConfirmHTML)
+    |> render("confirm.html")
   end
 
   defp invalid_response(conn) do
     conn
-    |> put_resp_content_type("text/html")
     |> put_status(404)
-    |> send_resp(404, gettext("Invalid or expired link."))
+    |> assign_confirm_assigns(:invalid)
+    |> put_view(MvWeb.JoinConfirmHTML)
+    |> render("confirm.html")
+  end
+
+  defp assign_confirm_assigns(conn, result) do
+    club_name =
+      case Mv.Membership.get_settings() do
+        {:ok, settings} -> settings.club_name || "Mitgliederverwaltung"
+        _ -> "Mitgliederverwaltung"
+      end
+
+    conn
+    |> assign(:result, result)
+    |> assign(:club_name, club_name)
+    |> assign(:csrf_token, Plug.CSRFProtection.get_csrf_token())
   end
 end