MeshChat V5 - Windows

FIRST RUN:
Double-click INSTALL_AND_RUN.bat.

That single installer will:
1. Reuse Python 3.10 or newer when already installed.
2. Install Python 3.13 automatically when Python is missing.
3. Create MeshChat's private virtual environment.
4. Install and verify required packages.
5. Start MeshChat.

LATER:
Double-click run.bat. If setup is incomplete, run.bat starts the installer automatically.

Server: chat.meshnet.bespace.one:443 with mandatory TLS verification.
Account data remains in MeshChatData. Received executables are never run automatically.
