Latitude 1.5.0-beta.1 for Minecraft 26.1.2

⚠️ Backup your worlds before updating.

Everything from the 1.5.0 release already out for Minecraft 26.2 — the rebuilt climate model, custom-biome provider support, the poles, HUD Studio, the new create-world screen, /latitude commands — now on 26.1.2, published to the platforms for the first time on this line.

Plus two fixes found and made specifically in this port, not yet in the 26.2 build:

• Structures now match the biome you're standing in. Structure placement and /locate structure were reading two different biome maps — one already repainted by Latitude, one still raw. Fixed both directions: a structure won't generate in a biome it doesn't belong in, and /locate structure won't promise you one that isn't actually there.
• Zone spawns land where they say they will. A Subtropical spawn could land a degree past its own boundary, into Temperate. Every zone's spawn target is now the true center of its latitude band.