Needs QA From F.A.N(다민)

- 베타 테스트
- 버그 리포팅

The issue is a request for beta testing and bug reporting, but provides no specific instructions. A newcomer would need to understand the TyPress printer billing system, likely a WPF application using MVVM architecture, socket.io, and printer spooler interaction. Start by exploring the repository structure, building the project, and running any existing tests to understand the system's functionality. 'Done' would involve identifying and documenting bugs, but without clear scope or entry points, this is highly ambiguous for a first-timer.

索引モデルが issue の本文から書いたものです。