Uruky adds image search, URL rewrites

Distributing source code under a non-compete license is a compelling hook for privacy-focused power users, but policing unauthorized redistributions will be near impossible.

* The addition of image search and URL rewrites addresses critical parity gaps with mainstream private search competitors like Kagi.

* Transitioning from NDAs to a PolyForm Shield license lowers user friction for source access while exposing the creators to copycats.

* Using a proof-of-work captcha for trial sign-ups is an elegant, privacy-preserving anti-abuse mechanism that avoids credit card walls.