Bump the engine submodule to a684c23 (Climate + day/night ambient). The
world scene now registers UseClimate and UseDayNight, so it darkens at
night and the HUD shows the season and temperature alongside the date.
Add docs/растения.md capturing the whole plant-ecosystem design (growth as
a suitability product, hybrid Mendelian genome, climate, lighting with
shadows, reproduction, persistence) and the A-D phase plan.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Leonid PershinandClaude Opus 4.8
aff5a947c5