Chore/astro docs tasks

[pixelgitter]

Deze branch voert een aantal taken uit beschreven in de gist https://gist.github.com/bddjong/cec00af3936bb4b21bfbe30639151f1b

Daarnaast zijn ook de headings en mobile navigation aangepast.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Review	Updated (UTC)
utrecht	Ready	Preview, Comment	Dec 19, 2025 5:49pm

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.73%. Comparing base (0e0e724) to head (7e82edd).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3004   +/-   ##
=======================================
  Coverage   90.73%   90.73%           
=======================================
  Files         201      201           
  Lines        1760     1760           
  Branches      383      390    +7     
=======================================
  Hits         1597     1597           
- Misses        155      157    +2     
+ Partials        8        6    -2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.