@simontatham It's been a looong time since I used #putty (I ran it in a #Wine "bottle", these came from #flatpak, I'm using Debian 13 #KDE). Thanks for all your efforts!
To my mind, 98% of the time, people would use putty to log into a #linux box/VPS, like say a #RaspberryPi (Raspberry Pi OS, is #Debian Trixie 13-based). This would be a sensible default assumption, **demographically**.
It took a good 2 hours of struggling, just to get 256 colors to work in Putty! (#Python's textualize library seriously expects 256, or *it can crash* when the Theme is changed). Please let the defaults be sane, so there's no struggle for 256 colors! Please alleviate my nerd rage - I beseech you!
1) Sane TERM env var:
Connection -> Data -> Terminal details -> Terminal-type string -> "putty-256color"
2) Sane default font:
Window -> Appearance -> Font settings -> "Change" button -> adwaita mono 12
3) Sane bolding of text:
Window -> Colors -> General options for color usage -> Indicate bolded text by changing: The font
4) Sane (Linux-terminal-style) Ctrl + Shift + {C,V} (for copy and paste):
Window -> Selection -> Assign copy/paste actions to clipboard -> Ctrl + Shift + (C,V}: System Clipboard