[分辨率] 找不到自定义分辨率的地方。

分辨率不支持原生2K (2560x1440)以及4K (3840x2160)的选项。

设置的文件中也找不到能手动指定分辨率的选项。

现在我只能选择1080p之后选择全屏来4K显示，导致整个画面很糊。

Start by locating the Unity settings or display-resolution handling described in the issue, including the existing 1080p and fullscreen behavior. Check how resolution choices are exposed and how custom values are stored. Done means native 2560x1440 and 3840x2160 options, or an explicit custom-resolution setting, display sharply without relying on blurry scaling.

Written by the indexing model from the issue text.