[Joltras]

Proposed changes

The floor JSON was built by concatenating strings, so seeds containing quotes produced invalid JSON, and it is now generated with json.dumps while keeping the same keys and structure. Loading a floor did not restore the floor grid or the room id counter, which broke neighbour checks and caused duplicate ids for new rooms, and both are now rebuilt from the loaded rooms. Teleport rooms now store their connected room id and are restored as teleport rooms, while older files without that field still load as before. Opening a floor in the UI also dropped all doors and teleport connections, which are now kept as well.

Types of changes

What types of changes does your code introduce to this project?
Put an x in the boxes that apply

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)