Host network picker and persistent lobby

Host network picker and persistent lobby

• The online dialog now lists active IPv4 network devices, prefers ZeroTier, and lets hosts select the interface/address to listen on. Refresh detects newly connected devices. The host log identifies the address to share.
• Removed the three-minute host lobby deadline. Waiting for a guest continues until you leave the session. Setup and gameplay connection timeouts remain.
• Connection failures now identify the endpoint and explain routing, firewall, refused-connection and timeout checks.
• Includes automatic runtime installation and the EGL/GLX packaging fix from previous previews.

Both players should extract this complete archive and run its launcher. Choose Locate installation to reuse an existing installation. In Host a session, choose your ZeroTier interface, start, and share its managed IP and the current invitation privately.

A network picker cannot repair missing ZeroTier routes or firewall rejection. See the expanded player setup and No route to host troubleshooting.

Linux x86_64, glibc 2.38+. Python syntax and packaging were checked; gameplay, GUI and two-PC network testing remain with testers. The native game binary is unchanged.