Registrieren
<%= form_for(resource, as: resource_name, url: registration_path(resource_name)) do |f| %>
<%= f.label :email %>
<%= f.email_field :email, class: "form-control" %>
<%= f.label :password %>
<%= f.password_field :password, autocomplete: "new‑password", class: "form-control" %>
<%= f.label :password_confirmation %>
<%= f.password_field :password_confirmation, autocomplete: "new‑password", class: "form-control" %>
<%= f.submit "Registrieren", class: "btn btn-success" %>
<% end %>
<%= render "devise/shared/links" %>