ui: Menü schlanker — Manifest + Code in den Footer

Hauptmenü: JOURNAL · LIBRARY · ARCHIV · DIALOG. Manifest und Code (Repo)
wandern in die Footer-Linkleiste zu Colophon/Impressum/Datenschutz/RSS/Spenden.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

layouts/_partials/footer.html

@@ -9,9 +9,11 @@
     </p>
   </div>
   <nav class="footer-links" aria-label="Footer">
+    <a href="/manifest/">Manifest</a>
     <a href="/colophon/">Colophon</a>
     <a href="/impressum/">Kontakt / Impressum</a>
     <a href="/datenschutz/">Datenschutz</a>
+    <a href="https://git.openbureau.ch">Code</a>
     <a href="/index.xml">RSS</a>
     <a href="/spenden/">Spenden</a>
   </nav>