Default value Select Input

other way around:

  <.form for={@form}  id="main-form" phx-submit="save" phx-change="validate"  class="space-y-6">
     <div >
       <label>@privacy_options</label>
       <.input field={@form[:theme]} type="select" options={@theme_options} />
    </div>
  </.form>