Maybe/app/views/transactions/new.html.erb

<%= modal do %>
  <article class="mx-auto w-full p-4 space-y-4">
    <header class="flex justify-between">
      <h2 class="font-medium text-xl">New transaction</h2>
      <%= lucide_icon "x", class: "w-5 h-5 text-gray-500", data: { action: "click->modal#close" } %>
    </header>

    <%= render "form", transaction: @transaction %>
  </article>
<% end %>