Client App Fix Issue [Bug] 'export' button does not work #2884

[+] fix(exporter.tsx): add async keyword to download function
[+] feat(exporter.tsx): add support for saving image file using window.__TAURI__ API
[+] feat(global.d.ts): add types for window.__TAURI__ API methods
[+] feat(locales): add translations for download success and failure messages
[+] feat(sync.ts): add support for generating backup file name with date and time
[+] fix(utils.ts): add async keyword to downloadAs function and add support for saving file using window.__TAURI__ API