This commit adds the Tauri desktop app as a completely separate project
in the /tauri folder without modifying anything in the web project.
- Created /tauri folder with standalone Tauri system tray application
- Configured as menu bar/system tray app (matching Mac app architecture)
- Runs embedded HTTP server on port 4020
- Opens web dashboard in default browser
- No embedded web view or frontend code
- Minimal package.json with only Tauri CLI dependency
The web folder remains completely untouched, ensuring clean separation
between the web and desktop projects.
