v4.0.2

Changed

• examples/jack reads JACK_* environment variables. ASK_AGENTDECK_ORIGINS,
  ASK_AGENTDECK_SESSIONS_PER_DAY and ASK_AGENTDECK_TURNS_PER_SESSION are now
  JACK_ORIGINS, JACK_SESSIONS_PER_DAY and JACK_TURNS_PER_SESSION, correcting 4.0.1,
  which said they would keep their names. A deployment that sets the old names falls back to
  the defaults silently, so rename them when you upgrade.
• The documentation landing page is one continuous build rather than nine chapters. It
  builds Jack once, from an Agent to a live run, and the execution tree beside the code is
  that code's own tree.
• How Jack is built is its own page, with the decisions
  and the alternatives they beat in
  Implementation notes. The README follows the same
  build.

Fixed

• Jack could not be reached from the published site. The docs build baked
  http://localhost:8100 as its API origin whenever NEXT_PUBLIC_AGENTDECK_API_URL was
  unset, so the panel called the visitor's own machine. docs-site/.env.production now
  carries the origin, and a real environment variable still wins.
• A second question to Jack replaced the first. The panel keeps the transcript, so a
  conversation reads as one.