feat: add floating navigation bar

> Reference Images of feature from app InstallerX-Revived

![Screenshot_2026-06-11-18-06-31-291_com.rosan.installer.x.revived-edit.jpg](https://github.com/user-attachments/assets/b5225437-4fb5-4348-9405-b9f8419c8cad)
![Screenshot_2026-06-11-18-05-33-788_com.rosan.installer.x.revived-edit.jpg](https://github.com/user-attachments/assets/84604cb4-59d6-4ff7-bebd-9ee01d7193b5)



