Hide bottom theme toggle from sidebar/footer

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: MDA2AV

docs/hugo.yaml

@@ -48,6 +48,8 @@ menu:
         icon: github
 
 params:
+  theme:
+    displayToggle: false
   navbar:
     displayTitle: true
     displayLogo: true