Ghostty SSH input issues are caused by missing terminfo on the remote host

When I SSH'd into Ubuntu from Ghostty, backspace didn't work and cursor movement was broken. Turns out the remote host didn't have the xterm-ghostty terminfo installed. Ghostty sets TERM=xterm-ghostty by default, and without the matching terminfo on the remote side, terminal control sequences get misinterpreted.

Adding this to the Ghostty config fixes it automatically on SSH:

shell-integration-features = ssh-terminfo,ssh-env

Here's what each option does:

• ssh-terminfo — Automatically installs the xterm-ghostty terminfo on the remote host during the first SSH connection
• ssh-env — Falls back to TERM=xterm-256color if the terminfo installation fails

With both set, hosts that accept the terminfo get native support, and the rest gracefully fall back to xterm-256color.