Added chests on Earth's surface and in caves, with opening and closing, one-time wood or iron loot, and saved positions and state.
Added mineable rocks and loose iron pickups to planet surfaces, and increased rock density in new caves.
Completed missing translations for dialogue, tutorials, controls, rocket objectives, settings, and item names across all supported languages.
Fixed missing translations for the "Find the source of the rumbling" objective and "Meteor Impact" mission title in all non-English languages.