1. 1. Summary

• Convert the fresh-venv `buildscripts/uv_sync.sh` path to a Bash-safe form in `bazel/wrapper_hook/install_modules.py`.
• Add regression coverage in `bazel/wrapper_hook/install_modules_test.py`.

1. 1. Operational benefit

Prevents fresh Windows checkouts using Git Bash or Cygwin from failing dependency bootstrap with a mangled `C:Users...` path and the subsequent `yaml` import error.

1. 1. Safety and compatibility

• Applies slash conversion only on Windows; POSIX behavior is unchanged.
• Resolves the repository root for the bootstrap script and working directory.
• Dependency selection and existing non-bootstrap sync behavior are unchanged.

1. 1. Testing

• `bazel run format` — passed.
• Focused wrapper-hook unit tests — 11 passed.
• `bazel test //bazel/wrapper_hook:install_modules_test --test_output=errors` could not start in this environment because `/data/bazel_cache` is read-only.