On a Windows profile whose folder name contains a space (e.g. "First Last"),
Windows can expose %TEMP%/%TMP% as an 8.3 short path
(C:\Users\FIRST~1.LAS\AppData\Local\Temp). PowerShell's FileSystem provider
mishandles the "~1.ext" component when the path reaches a provider cmdlet such
as `Tee-Object -FilePath`, throwing:
An object at the specified path C:\Users\FIRST~1.LAS does not exist.
Every Node/Electron install+build stage streams its log to %TEMP% via
Tee-Object, so they all abort with that error (browser-tools npm, Playwright,
TUI npm, and the hard-failing desktop build), while the Python/uv stages --
which never write a side log to %TEMP% through a provider cmdlet -- succeed.
Normalize %TEMP%/%TMP% to their long form once, up front, so every downstream
cmdlet and child process sees a path the provider can resolve.
Fixes#39308
ac83365d96