{#- Chirp shell_section macro — htmx plumbing for inner layout shells

   Use for nested shells (forum > subforum > thread). Abstracts hx-target,
   hx-swap so inner layouts don't need to know htmx details.

   The renderer produces fragments for inner layouts, so hx-select is NOT
   needed here — only at the root where responses may be full HTML docs.

   Usage:
       {% from "chirp/macros/shell.html" import shell_section %}
       <div class="forum-shell">
         <nav>Forum navigation</nav>
         {% call shell_section("forum-content") %}
           {% block content %}{% end %}
         {% end %}
       </div>
-#}

{% def shell_section(id, transition=true) %}
<div id="{{ id }}"
     hx-target="#{{ id }}"
     hx-swap="innerHTML{% if transition %} transition:true{% end %}">
  {% slot %}
</div>
{% end %}