- Fix encryption desync by tracking decrypted header bytes in world socket
- Fix UPDATE_OBJECT movement block parsing to handle 3.3.5a update flags
- Fix UNIT_FIELD_DISPLAYID index (67, not 71)
- Add creature spawn/despawn callbacks with DBC-based model loading
- Add SMSG_COMPRESSED_UPDATE_OBJECT opcode support
Replace POSIX-specific socket and process APIs with portable
abstractions so the project builds on both Windows and Linux.
- Add include/network/net_platform.hpp: Winsock2/POSIX socket
abstraction (socket types, non-blocking, error handling,
WSAStartup lifecycle)
- Add include/platform/process.hpp: CreateProcess/fork+exec
abstraction for spawning ffplay subprocesses
- Update network module (tcp_socket, world_socket) to use
portable socket helpers instead of raw POSIX calls
- Update audio module (music_manager, footstep_manager,
activity_sound_manager) to use portable process helpers
instead of fork/exec/kill/waitpid
- Replace hardcoded /tmp/ paths with std::filesystem::temp_directory_path()
- Link ws2_32 and SDL2main on Windows in CMakeLists.txt
