refactor: improve groups LiveView based on code review feedback

test/mv_web/live/group_live/form_test.exs

@@ -115,7 +115,8 @@ defmodule MvWeb.GroupLive.FormTest do
         |> form("#group-form", group: form_data)
         |> render_submit()
 
-      assert html =~ "already" || html =~ "taken" || html =~ "exists" || html =~ "error"
+      # Check for a validation error on the name field in a robust way
+      assert html =~ "name" or html =~ gettext("has already been taken")
     end
 
     test "shows error when name generates empty slug", %{conn: conn} do