Draft v5.0.1

Changed

• npm version now bumps the website's version labels too.
  sync-version.sh rewrites the nav version pill on every page that carries
  one, the landing hero's REV, and the book landing's REV, found by CSS class
  so new pages are covered automatically; the hook stages exactly those files
  with the manifests (--stage). 5.0.0 needed those 15 labels edited by hand.
  test-version-sync.sh now fails on a site label that drifts from
  package.json.

Fixed

• The landing page's graph demos showed the retired engine's output. The
  playground promised the engine's real output schema, but all six fixtures
  used the old shapes (file-level hotspots, module cycles, files_by_depth,
  doc/config buckets); they now match each wrapper's 5.0 output. The hero
  ledger shows code · test only, as by_category does. The engine blog post
  no longer tells readers to run /draft:graph for fresh results, and the May
  walkthrough carries a note on the changed output. CONTRIBUTING's CI table,
  the architecture template's module count, and the fetch script's header
  are corrected too.
• The landing-page hero overflowed on phones. Below 1100px the hero grid
  switched to a 1fr track, whose minimum is its content's width, and the
  install chip's no-wrap command held that at ~430px — so on a 390px screen
  the tagline, install chip, stats row, and Impact Console were cut off at the
  right edge. The track is now minmax(0, 1fr) and the command truncates with
  an ellipsis beside its Copy button.