Tokibean 码豆 0.4.2

Release v0.4.2: smooth night moon — phase-accurate crescent, no dark disc

Replace the per-pixel moon (blocky lit/#3a3a4a-shaded disc) with the original
night-scene's clean smooth crescent look — a warm #f3e7a6 lit lune, no dark
disc and no glow — while keeping real phase accuracy. The terminator is a
half-ellipse (rx = R·cos θ) so it tracks new → crescent → half → gibbous →
full and back, sign-flipping crescent↔gibbous at the quarters.

Co-Authored-By: Claude Opus 4.8 noreply@anthropic.com