Guarded to only fire for interactive shells with a real tty, when
tmux isn't already active, and only if the tmux binary is found -
so it falls back to a plain shell if any of that isn't true. Not
exec'd, so an unexpected tmux exit also drops back to a normal shell
instead of closing the connection. Replaces manually running bin/tmx.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Same host-differentiation as the tmux statusbar: blue accent for
prosrvdemadev01, existing yellow/gray colors kept as the default
elsewhere.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
daniel fusser