Add route for contact details page

Editor assessment

The subject states a concrete addition, a route for the contact details page, and chore is a doubtful type for new routing where feat fits better, though the straddle is arguable since the route may expose an existing page. No scope, no body explaining what the route enables, deep linking or panel navigation presumably, which is the user-visible purpose. The Co-authored-by footer is well formed. The trailing pull-request number is conventional. Hygiene otherwise fine. Understandable, valid, miscast, and thin. The route's user-facing purpose is never described.