Windows: PowerShell installer (1.1.0) does not add vite-plus\bin to user PATH — 'vp' not recognized #2984

Describe the bug

On Windows 11, installing Vite+ with the PowerShell installer completes, but the bin directory (%LOCALAPPDATA%\vite-plus\bin) is never added to the user PATH. In a new PowerShell session, vp is not found:

vp: The term 'vp' is not recognized as a name of a cmdlet, function, script file, or executable program.
Check the spelling of the name, or if a path was included, verify that the path is correct and try again.

What I expect: after the installer finishes (and a new terminal is opened), vp resolves from PATH.

What actually happens: the install itself is fine. Every file is in place, state\self-setup\*.json was written, and running vp.exe by its full path works. But the user PATH (HKCU\Environment\Path) has no vite-plus entry. As far as I can tell from install.ps1, the PATH update is delegated to the vp self-setup handoff (Invoke-InstallHandoff); that step apparently ran but never persisted the user PATH change.

This looks similar to #973, but that was on 0.1.x and was fixed by upgrading. This is a fresh install of 1.1.0.

Reproduction

N/A. No project needed; this is a global install issue (steps below).

Steps to reproduce

1. On Windows 11 Pro (build 26200), in PowerShell 7.1.4, run: irm https://vite.plus/ps1 | iex
2. Open a new PowerShell window.
3. Run vp help or vp env doctor. Result: "The term 'vp' is not recognized…"
4. Run & "$env:LOCALAPPDATA\vite-plus\bin\vp.exe" env doctor. It works and reports the PATH problem:

PATH
  ✗ vp                not in PATH
  note: Run 'vp env setup' to create the vp shim.
  ✗ Shim dir          not in PATH
  note: Expected: C:\Users\<user>\AppData\Local\vite-plus\bin

(All Installation and Configuration checks pass, including shims.)

Possibly relevant: my existing user PATH is a REG_EXPAND_SZ value that contains an unexpanded variable entry (%PNPM_HOME%) and one empty entry (;;). Total length is about 817 characters. I haven't confirmed whether either of these affects the self-setup PATH write.

Workaround: manually prepend %LOCALAPPDATA%\vite-plus\bin to the user PATH and restart the terminal.

System Info

> vp env current
Node.js:
  Version    24.21.0
  Source     lts
  Bin Path   C:\Users\<user>\AppData\Local\vite-plus\data\js_runtime\node\24.21.0\node.exe
  Installed  true
  Mode       managed

> vp --version
vp v1.1.0

OS: Windows 11 Pro 10.0.26200
Shell: PowerShell 7.1.4

Used Package Manager

N/A (global install; no package manager selected yet)