fix(landing-nav): scroll to top on route change in shared shells #4676

Bugbot Review

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Final Result: Bugbot completed review - no issues found! ✅

Request ID: serverGenReqId_e05a623f-2db2-4f90-8615-4eada9544c2f

✅ Bugbot reviewed your changes and found no new issues!

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^{Reviewed by Cursor Bugbot for commit 7e926fe. Configure here.}