Weather that is never saved
Built a general particle engine, originally scoped as just a few bugs drifting over the catching areas, that also now carries mosquitoes over lakes, falling autumn leaves, cave mist and the sky itself.
Added sky weather (rain, snow, fog) as a layer on top of the existing ground weather reading rather than a replacement for it. A cold marsh in the snow now drains stamina harder than either condition alone.
Sky weather is never saved: each day's sky is rolled from the world seed and the date, the same trick terrain regeneration already uses, and a day's weather now opens at a rolled hour and lasts a rolled few instead of running midnight to midnight.
Fixed new games often opening in rain, fair odds but read as broken, by forcing the first day of every world clear.
Fixed a bug the last missing test file caught: switching from one weather type to another cleared the old particles but kept a spawn credit that had been piling up, so the new weather arrived as one sudden burst instead of fading in.
