Merged the refactorer handoff (e77e174). The architecture holds: the image
helpers isImageUrl/imageAltText are pure post-links functions, failed-images
is a pure state transition, and PostImage/PostContent stay presentational
with no IO. Added a unit test for isImageUrl non-string input to kill the
last surviving language mutant; mutation and acceptance manifests are
tool-written.
By architect.
Add Gherkin for inline image rendering in posts: extension-based image URL
detection (.jpg/.jpeg/.png/.gif/.webp/.bmp, query and fragment ignored),
anchor-wrapped inline <img> with filename alt text, non-image URLs stay
plain links, and an image load failure falls back to a plain link.
By specifier.
Chris Troutner