Maybe/app/views/accounts/_form.html.erb

<%# locals: (account:, url:) %>

<%= styled_form_with model: account, url: url, scope: :account, class: "flex flex-col gap-4 justify-between grow", data: { turbo: false } do |f| %>
  <div class="grow space-y-2">
    <%= f.hidden_field :accountable_type %>
    <%= f.text_field :name, placeholder: t(".name_placeholder"), required: "required", label: t(".name_label"), autofocus: true %>
    <%= f.money_field :balance, label: t(".balance"), required: true, default_currency: Current.family.currency %>

    <% if account.new_record? %>
      <div class="flex items-center gap-2 mt-3 mb-6">
        <div class="w-1/2"><%= f.date_field :start_date, label: t(".start_date"), max: Date.yesterday, min: Account::Entry.min_supported_date %></div>
        <div class="w-1/2"><%= f.number_field :start_balance, label: t(".start_balance"), placeholder: 90 %></div>
      </div>
    <% end %>

    <%= render "accounts/accountables/#{permitted_accountable_partial(account.accountable_type)}", f: f %>
  </div>

  <%= f.submit "#{account.new_record? ? "Add" : "Update"} #{account.accountable.model_name.human.downcase}" %>
<% end %>