tests/scan.rs: 3 tests exercising scan_from_root via the public API —
finds git repos, skips hidden directories, and respects max_depth.
Note: tempfile::tempdir() generates hidden paths (.tmpXXXXXX) on this
system, so each test creates a visible scan_root/ subdirectory to avoid
filter_entry silently skipping the walk root.
tests/session_config.rs: 2 tests for SessionConfig::load_from_project —
loads a .tmuxido.toml written into a temp dir and returns None when the
file is absent.
tests/cache_lifecycle.rs: round-trip test that saves a ProjectCache and
reloads it, verifying the projects list survives serialisation.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
