Fixed fog leaking into inventory previews

I fixed the equipment preview inheriting the desert fog. The inventory now keeps its own lit materials, so the body and field pack remain visible even when the world behind the interface is unexplored.

The preview clones its materials for the inspection scene. This keeps the lighting correction separate from world visibility and leaves the field fog rules intact.

“Equipment previews retain their own lit materials instead of inheriting the world fog silhouette.”

The clips open the native equipment interface and turn its preview to inspect the body and pack. They show the current lit result, rather than recreating a before-and-after comparison.