v4.0.0

v4.0.0 moves the desktop app to Tauri v2.

Highlights:

• Rust-backed desktop runtime and platform integration
• Updated interface and streamlined installer workflow
• Cross-platform packaging for Windows and Linux builds
• Improved hardware scan, validation, EFI build, and recovery flow

Release assets:

• Windows installer (.exe)
• Linux AppImage
• Linux .deb package