Site: the devlog, the blog's roro9stack posts in the site's style; Devlog replaces Blog in the navigation

Seven posts imported into site/content/devlog/ with their text unchanged,
links between them pointing to /devlog/, and shortcodes (sign, cast, steps,
asides, folded sections, diagrams, captions) restyled in the site's palette.
The 17 inline SVG diagrams carried <style> blocks and style attributes the
site's Content-Security-Policy refuses: their rules moved to
devlog-diagrams.css, and a diagram's minimum width is a class. An Atom feed
at /devlog/atom.xml.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EhqxQ49eCju4CzKYNjZzwT

site/templates/shortcodes/cast.html

@@ -0,0 +1,9 @@
+{#- The post's cast of components, from [[extra.cast]] entries (name, role, text) in its front matter -#}
+<dl class="cast">
+  {%- for c in page.extra.cast %}
+  <div>
+    <dt>{{ c.name }}<span>{{ c.role }}</span></dt>
+    <dd>{{ c.text | markdown(inline=true) | safe }}</dd>
+  </div>
+  {%- endfor %}
+</dl>