Separate floors from structures for occupancy, rendering, interaction and deconstruction. Convert marked Tiled tiles to stateful gameplay buildings, retain a configurable default terrain tile, and preserve legacy saved terrain without reseeding it.
Bundle a Tiled conversion extension with editable per-object properties, conflict checks and single-step undo. Cover conversion, persistence, collision and gameplay in Rust tests and run the extension tests in CI.
BREAKING CHANGE: network protocol version 6 adds layered building state and default terrain metadata; clients and servers must be upgraded together.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Steve Biedermann
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