Windows Claude CLI discovery misses executable variants and file URL paths

[mradwankhalil]

Summary

The managed Claude CLI resolver can fail on Windows even when Claude Code is installed.

Observed

• npm global binaries resolve through Windows .cmd/.exe/.bat wrappers, but the resolver only probes the extensionless path.
• URL pathname values used as child-process working directories need file-URL conversion on Windows.

Expected

The resolver should probe Windows executable variants and tests should use filesystem paths rather than URL pathname strings.