`talosctl dashboard` claims "terminal type unsupported" for tmux-256color, et al

[fahhem]

Bug Report

$ talosctl dashboard
terminal type unsupported
$ TERM=tmux talosctl dashboard
terminal type unsupported
$ TERM=xterm-256color talosctl dashboard
[dashboard launches]

Description

It seems terminal detection is very tight, rather than being capability based (terminfo) or by checking terminal families.

I looked only a little bit, and it seems talosctl uses tcell, which does mention tmux support in their latest releases. I'm not sure where the check against $TERM is happening that causes talosctl to support fewer terminal types.

Logs

Environment

• Talos version:

Client:
        Tag:         v1.7.1
        SHA:         e9cb904e
        Built:       
        Go version:  go1.22.2
        OS/Arch:     linux/amd64

• Kubernetes version: n/a
• Platform: Ubuntu 23.04 Linux 6.2.0-39