Seven tests covering the Routing tab inside the script editor: add
+ list + remove (handling the window.confirm dialog), match-preview
round trip, path-kind mismatch warning, unclaimed-host warning,
duplicate-route 409, plus reserved-prefix rejection and a path-XSS
adversarial that checks no script tag escapes into the route list.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
