List klink in the theme previews

[timkpaine]

The preview links and the bundled theme list in the configuration docs are maintained by hand, so klink was missing from both after it was added.

Cover the links with a test parametrized over BUNDLED_THEMES so a newly added theme cannot go undocumented.

Description

Brief description of the changes in this PR.

Type of Change

• Bug fix
• New feature
• Documentation update
• Refactor / code cleanup
• CI / build configuration
• Other (describe below)

Checklist

• Linting passes (make lint)
• Tests pass (make test)
• New tests added for new functionality
• Documentation updated (if applicable)
• Changelog / version bump (if applicable)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.22%. Comparing base (526cd4a) to head (d51863d).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #154      +/-   ##
==========================================
+ Coverage   86.19%   86.22%   +0.03%     
==========================================
  Files          16       16              
  Lines        2021     2026       +5     
  Branches      209      209              
==========================================
+ Hits         1742     1747       +5     
  Misses        217      217              
  Partials       62       62              

☔ View full report in Codecov by Harness.
📢 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.