scene: keep the terrain sky and baked tables out of the main chunk (stacked on #47)
trainingNotice: say whose ruling the wording is (comment only)
CI: cancel superseded runs with workflow concurrency groups
quartz-pages: run Pages steps and deploy only on the GitHub mirror
CI: cancel superseded runs with workflow concurrency groups
Plate the remaining bare-sky regions: upload board, scroll-to-top, welcome hero, nav tabs
Sky-state control in the estate title bar; the state picks the theme
scene: ridge and terrain scenes follow the sky state
scene: skyState test takes the worse of both sky ends