minor fixes

* added back the HPCE logo to landing page
* activated the sticky tabs navigation feature (so navigation bar stays
  visible)
* added edit buttons to content (so users can _maybe_ help us in keeping
  our docs up to date)

mkdocs.yml

@@ -3,8 +3,10 @@ site_name: HPCE User Documentation
 site_url: https://hpce.pages.psi.ch
 
 # Repository
-repo_name: hpce/gitea-pages
+repo_name: hpce-userdocs
 repo_url: https://gitea.psi.ch/hpce/gitea-pages
+# TODO unsure if this works, branch needs to be changed from `mkdocs` to `main`
+edit_uri: _edit/mkdocs/docs/
 
 # Copyright
 copyright: Copyright © 2025 HPC and Emerging Technologies Group/CSD @ Paul Scherrer Institut
@@ -15,9 +17,14 @@ theme:
   favicon: images/favicon.ico
   logo: images/hpce_logo.png
   features:
+    - navigation.instant
     - navigation.tabs
+    - navigation.tabs.sticky
     - navigation.sections
     - navigation.indexes
+    - toc.follow
+    - content.action.edit
+    - content.action.view
   palette:
     - media: "(prefers-color-scheme)"
       toggle: