⛏️ Director's Cut — moving up from Mining Layers V1

Everything about the Director's Cut goes here. It is the long version of Mining Layers, not a replacement: V1 stays free and keeps getting fixes.

Questions about the move help most. Layers that behave differently from V1. Savegames that already carry material in the ground. Maps you have been running for months. The Cut is still being built, so what you report here can still change it.