yaml.changelog and repo.json.Changelog now use **vX.Y.Z** subblock
headers instead of the older **Hellion Chat X.Y.Z** form. Updated the
three regex patterns (yaml check, repo.json check, version counter)
and re-enabled Block C in preflight.sh — the SKIP workaround is no
longer needed.
Establishes the local pre-push gate. preflight.sh runs four blocks: version
consistency, manifest shape (Icon plus all ImageUrls), changelog sync, plus a
release build as compile-health smoke. setup-hooks.sh wires core.hooksPath to
.githooks. .gitignore opens scripts/ for tracking (setup-dev-env.sh stays
private). Test execution itself lives in a separate local repository and is
not part of this codebase.