UI fallback

Sometimes the UI mod gets broken after a new release from MG. It would be nice if we could detect this based on the unify version of the game and the UI file - the game does have both of these numbers because they can be found in the log file after such error.

When we detect different unity version we should instead load the vanilla UI which was renamed to `.backup` when installing the mod. Also we should print some message to the screen or into a popup to let the user know what happened and that they should report the issue to us on GitHub or Discord.

該 issue 提到從日誌檔案中偵測 Unity 版本不符並載入備份 UI 檔案。請尋找處理 UI 模組載入和錯誤記錄的程式碼。檢查原版 UI 備份的建立位置以及如何從日誌中解析版本號。實作偵測和回退邏輯需要理解模組的初始化和 UI 載入流程。

由索引模型根據 Issue 內容生成。