fix: failing tests

test/mv_web/live/join_live_email_failure_test.exs

@@ -28,6 +28,8 @@ defmodule MvWeb.JoinLiveEmailFailureTest do
 
     {:ok, view, _html} = live(conn, "/join")
 
+    # Use the HTML returned by render_submit (updated DOM including flash)
+    html =
       view
       |> form("#join-form", %{
         "email" => "fail#{System.unique_integer([:positive])}@example.com",
@@ -37,7 +39,6 @@ defmodule MvWeb.JoinLiveEmailFailureTest do
       })
       |> render_submit()
 
-    html = render(view)
     # Error message is translated; accept English or German wording
     assert html =~ "could not send" or html =~ "confirmation email" or
              html =~ "konnte nicht" or html =~ "Bestätigungs-E-Mail"