Bug: Incorrect project config path created for UNC paths on Windows

Environment:

• OS: Windows
• Claude Code version: 2.1.27
• Working directory: \\192.168.70.7\config\

Problem:
When running Claude Code from a UNC path, it incorrectly creates the project .claude folder at:

\\192.168.70.7\config\192.168.70.7\config\.claude

Instead of:

\\192.168.70.7\config\.claude

This causes Claude Code to re-run project initialization on every startup because it cannot find the config folder it created.

Expected behavior:
Project .claude folder should be created directly in the working directory root.

Workaround:
Using mapped network drive (e.g., net use Z: \\192.168.70.7\config) works correctly.