babypat rewrite: tone-key layout now mirrors notepat.mjs NOTE_TO_KEY exactly, so muscle memory carries over once the baby graduates. Every letter key + ; ' ] plays a chromatic note in the piano voice across 4 octaves (sub-base / base / upper / highest). Numbers play drums, arrows swoosh, space kicks. Visual: every press flashes a new background color, with the settled bg drifting through hues as you play. Splash letters still pop and fade. Note colors mirror notepat's NOTE_COLORS palette so the same note shows the same color in both pieces. flash-mac.sh: AC_BOOT_PIECE env var overrides the hardcoded boot piece in config.json on both ACBOOT and ACEFI partitions. Default stays "notepat". Lets us flash a stick that boots straight into babypat (or any other piece) without editing the script. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>