Network and WSL repository paths

Add local repository accepts normal UNC shares, Windows mapped drives, and WSL UNC shares as first-class repository locations. It preserves the exact UNC root instead of folding it through the current local drive and identifies the connection type during validation.

Behavior and configuration

• \\server\share\repo is retained as a UNC path.
• mapped drive letters are detected with a bounded net.exe use DRIVE: probe.
• \\wsl.localhost\Distro\... and \\wsl$\Distro\... are identified as WSL shares.
• a successful add explains that the path depends on a reconnectable location; an unavailable location gives network-specific recovery guidance.

No mount or credential setting is stored by Desktop Material. Windows and WSL remain responsible for reconnecting the location.

Failure modes and recovery

An offline share, disconnected VPN, unavailable mapped drive, or stopped WSL distribution is reported as unavailable instead of encouraging repository creation on a missing network path. Reconnect it and submit the same path again. Persisted repositories continue to use the existing Missing status and picker filter while their location is offline.

Security considerations

Device namespace paths such as \\?\ and \\.\, controls, and empty paths are rejected. Mapped-drive detection runs a fixed executable with positional arguments, no shell, a two-second timeout, and a 32 KiB output cap. Git's existing unsafe-owner check and explicit safe-directory review still apply to network repositories.

Verification

Unit coverage proves UNC preservation, UNC/WSL classification, exact mapped drive probing, local-drive fallback, and device/control rejection.