replace_string_in_file / create_file tools fail with "File does not exist" on Remote SSH (NFS UNC paths)

[amrzdong]

Environment: VS Code on Windows → Remote SSH to Linux (SLES15), workspace on NFS mount

Repro: Workspace is on a Remote SSH target (Linux). The workspace root is an NFS mount, with a path like /nfs/mount/user/workspace/. VS Code presents this as \nfs\mount\user\workspace... in UNC format. read_file resolves the path and works. replace_string_in_file and create_file fail with "File does not exist" for the same path.

Expected: All file tools should resolve UNC paths consistently in Remote SSH sessions.