1.3.0

• Initial release.
• Direct IP host / join over the game's own UDP transport (no Steam lobby or relay).
• Redesigned in-game panel: home screen with Create Room / Join Room / Mod Settings, top bar with back button, F7 hint and close button, page transitions, toasts and hints.
• Bilingual panel (English / 简体中文) that follows the game's language.
• Host identity reservation and per-connection identity de-duplication (safe saves).
• Save-before-teardown, session watchdog with a clear reason on failure, recent-room history, one-click IP copy.
• Only the game version is a hard requirement; a protocol number guards the wire format.