The UI coloring scheme

When using `System` setting, it doesn't respect the system's theme. It's always using `dark` theme

<img width="800" height="217" alt="Image" src="https://github.com/user-attachments/assets/370076ff-378d-47b8-a876-0fbce9cf3c5a" />

<img width="800" height="205" alt="Image" src="https://github.com/user-attachments/assets/d097626c-3a15-4765-afc5-e7aca614caf9" />