• Tmux-aware SSH: new window instead of TUI suspend
• When purple runs inside a tmux session, pressing Enter on a host opens SSH in a new tmux window named after the alias. The purple TUI stays alive in the original window so you can switch between sessions with prefix + n/p and keep navigating other hosts
• Detection via $TMUX env var. No tmux means the current suspend-and-restore behavior is unchanged
• Hosts with an askpass source (keychain, 1Password, Bitwarden, Vault KV, pass, cmd) keep the suspend-TUI flow because the askpass relay needs inherited stdin
• Vault SSH cert signing still runs before the tmux window opens, so short-lived certs are refreshed exactly as before. Signing status messages surface via the purple status bar
• Resolves #18