some terminal tools are rendered in multiple parts?

Testing #324419

Note the 3 tools that have been rendered outside of the "thinking" block... you can see that they started to render _inside_ the "thinking" block but then got cut off or something? Very odd.

Here's my prompt:

> ok now i wanna do something other than `ls`... here's what I was asked to do:
>
> ```
> Try a variety of commands (long-running, quoted args, commands writing files, commands with stderr output)
> ```
>
> I will then note, based on what I see:
> - a successful command shows an error decoration
> - a failing command shows a success decoration
> - the decoration is missing when it should reflect a known exit status
> - the decoration state differs from what the command actually returned