02dbbe97

Clarify invalid next path error

Rename the auth handler error so it matches the validation behavior. The
message now reports an invalid 'next' path instead of implying every failure
would cause an open redirect.

Agent Instructions

Each run corresponds to one flake attribute. Click a run for its logs and status.

Example: https://nix-ci.com/cb:mtlynch:little-moments/shared-secret-auth/02dbbe97aac15fac0145f5c7c2f3aef6ad014ad6/3d3ab842-56d1-4de1-8860-14ef59584558

Wait for suite to complete:

curl --netrc -N https://nix-ci.com/cb:mtlynch:little-moments/shared-secret-auth/02dbbe97aac15fac0145f5c7c2f3aef6ad014ad6/wait

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