v0.9.0 — two songs, shapes for every eye, a real editor

Content, accessibility, and a real editor.

Added

• Second built-in song: "Solder Groove" — a 92 BPM half-time
  groove (Dm–Bb–F–C, syncopated bass, held pad bars) alongside the
  128 BPM "Circuit Breaker"; charts from it exercise sustains and
  slower reading.
• Colorblind-safe lanes, always on — every lane has a distinct
  gem shape (square, circle, diamond, triangle, cross) on notes and
  receptors; fully readable with zero color.
• Stage Motion setting — stills the themed backdrop (reduced
  motion); HOPO notes are now visually distinct (smaller gem, bright
  core).
• Editor v2 — move a note with M, select a range with V
  (X deletes it, H bulk-toggles HOPO — one atomic undo step per
  bulk edit), and P auditions from the cursor with a metronome
  tick on every beat.
• Import pipeline, verified end-to-end — a walkthrough guide
  (docs/importing-songs.md), decode tests for every supported
  format (WAV/OGG/FLAC/MP3 — and M4A/AAC, which turned out to work),
  and songs/imported/<song>/ folders are now actually scanned
  (the old scan was one level too shallow).
• Autopilot can validate any library song
  (BEATBYTE_AUTOPILOT_SONG=<index|title>), and CI now boots the
  real game headless on Linux (Xvfb + lavapipe) and Windows (WARP).

Fixed

• An environment-killed autopilot run (window closed mid-song) could
  exit 0 without a verdict — it now fails loudly.
• Settings and charts from newer/older versions load tolerantly
  (pinned by tests); a settings file never loses your calibration on
  upgrade.

Downloads

Platform	File
macOS (Apple Silicon)	BeatByte-0.9.0-aarch64-apple-darwin.dmg or the .tar.gz
macOS (Intel)	BeatByte-0.9.0-x86_64-apple-darwin.dmg or the .tar.gz
Linux	BeatByte-0.9.0-x86_64.AppImage or the .tar.gz
Windows	beatbyte-v0.9.0-x86_64-pc-windows-msvc.zip

Full Changelog: v0.8.1...v0.9.0