notepat: arrow left/right speak side name, no longer change octave
Left/right arrow keys now just select which side's volume the up/down
arrows control, and speak "left" or "right" via TTS. They no longer
shift per-grid octave offsets — the octave offsets stay at their
defaults (0 and 1) so notes always play at their expected pitches.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>