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>

hugo.yaml

@@ -72,15 +72,10 @@ menus:
     - name: ARCHIV
       pageRef: /archiv
       weight: 25
-    - name: MANIFEST
-      pageRef: /manifest
-      weight: 30
     - name: DIALOG
       pageRef: /dialog
       weight: 40
-    - name: CODE
-      url: https://git.openbureau.ch
-      weight: 50
+    # MANIFEST + CODE stehen im Footer (schlankeres Hauptmenü).
 
 params:
   # Öffentliche Gitea-Repo-URL (für Provenance: Version → Commit, Verlauf).