Bug: Incorrect Chinese client language detection

The project utilizes the `CNString` method for Chinese localization, and determines Chinese client status via `RotationSolver.UI.RotationConfigWindow.CNLanguageClient`. The current judgment logic works incorrectly and cannot properly recognize Chinese clients. Suggest updating the property definition: ```C# public bool CNLanguageClient => _cachedDiagInfo?.Language.ToString() is "Chinese" or "ChineseSimplified"; ```