69cd0c7d

By: Michael Lynch <git@mtlynch.io>

Replace devLoginRedirect bool with build-tagged function

Use the same pattern as upgradeToHttps: a loginConfirmPath function
with separate dev/prod implementations selected by build tags. This
removes the DevLoginRedirect field from ServerParams and Server.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>