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/config.toml

@@ -5,7 +5,8 @@ description = "Open firmware for the M5Stack Cardputer ADV with the Cap LoRa-126
 default_language = "en"
 compile_sass = false
 build_search_index = false
-generate_feeds = false
+generate_feeds = false  # the devlog turns its own on (content/devlog/_index.md)
+feed_filenames = ["atom.xml"]
 # The built site goes to public/ at the root of the repository (git ignores it), whether Zola is run
 # from site/ or from the root with `--root site`.
 output_dir = "../public"
@@ -20,6 +21,7 @@ style = "class"
 theme = "nord"
 
 [extra]
+author = "twisla"
 repo = "https://git.twis.la/twisla/roro9stack"
 api = "https://git.twis.la/api/v1/repos/twisla/roro9stack"
 blog = "https://experiments.twis.la"