Support Windows paths containing spaces via PowerShell -EncodedCommmand

[linghengqian]

Problem

On Windows, the plugin passed paths unquoted to cmd.exe /c because Go's argv re-quoting turns " into \", which cmd.exe misinterprets as a volume-relative path (\path\) and rejects with "The filename, directory name, or volume label syntax is incorrect." This meant paths containing spaces (e.g. C:\Users\John Doe\.vfox) were completely unsupported.

The previous workaround was to skip quoting entirely — unquoted paths break at the first space. The drift check in manifest.lua silently failed rather than crashing, and git operations simply didn't work.

Solution

Route all path-bearing shell commands through PowerShell's -EncodedCommand (base64 UTF-16LE). The encoded string contains only [A-Za-z0-9+/=] — no spaces, no quotes — so Go's EscapeArg cannot mangle it. Inside the PowerShell script, paths are passed as single-quoted strings, which PowerShell handles natively.

Changes

lib/git.lua

• Added psQuote() for PowerShell single-quote quoting and execPS() for running scripts via -EncodedCommand
• git(), M.removeDir(), makeParentDir(), M.init() now use PowerShell on Windows
• probeWithTimeoutWindows reuses execPS, eliminating duplicate base64 code
• M.init batches git init + git config into a single PowerShell script

lib/manifest.lua

• Added base64, utf16le, psQuote helpers
• capture() auto-wraps commands in -EncodedCommand on Windows
• M.gitRoot uses Get-ChildItem -Directory instead of dir /b /ad
• New gitRevParse() helper used by M.currentHead and M.write

docs/ohos.md

• Removed the "Windows home containing a space is not supported" limitation

tests/e2e/windows/

• Added a new e2e combo (latest-ohos-default-spaces) that sets VFOX_HOME to a path containing a space, exercising the fix end-to-end

[linghengqian]

• This is a bug in https://github.com/version-fox/vfox itself.