Module compat 

Module for converting between legacy and new message formats.

This allows gradual migration without breaking the existing frontend.

Functions

legacy_game_state_to_snapshot

Convert legacy game state JSON to new GameSnapshot format.

parse_client_message

Parse a raw JSON message, handling both legacy and new formats.

serialize_server_message

Serialize a server message, optionally wrapping in an envelope.

snapshot_to_legacy_game_state

Convert new GameSnapshot to legacy game_state message format.