When an unauthenticated user opens a deep link, carry the requested
path through the login page in a redirect query param and return to it
after a successful login instead of always going to the home page.
Only same-origin targets are honored.
Claude-Session: https://claude.ai/code/session_011CFGjgYURSRTpXBaxp1Dq7
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
