[Copilot]

The test (windows-latest, 22) job was failing due to cross-platform path handling bugs: Windows absolute paths were being re-resolved as relative, and folder hyperlink URIs were host-dependent. This caused invalid state-file paths (D:\...\C:\...) and mismatched formatted output in Windows CI.

• State location resolution

  • Updated resolveStateLocation to treat both POSIX-absolute and Windows-absolute paths as already absolute before resolving against cwd.
  • Prevents accidental prefixing of Windows absolute --codex-home / CODEX_HOME values.

• Terminal folder hyperlink stability

  • Updated folderLink URI construction to emit stable file:// links for:
    • POSIX absolute paths (/work/... → file:///work/...)
    • Windows drive paths (C:\... → file:///C:/...)
  • Keeps output deterministic across runner OSes.

• Focused regression coverage

  • Added unit coverage for:
    • absolute Windows codexHome when resolved under posix-mode parsing
    • stable hyperlink encoding for absolute folder paths

const codexHome = isAbsolutePath(configuredHome)
  ? configuredHome
  : parser.resolve(cwd, configuredHome);