Function test_diff_empty

crates/opencode-session/src/session.rs:1452–1456

()

    #[test]
    fn test_diff_empty() {
        let session = Session::new("project-1", "/path");
        let diffs = session.diff();
        assert!(diffs.is_empty());
    }

    #[test]
    fn test_diff_with_summary() {