Bump version to 0.8.4 for web app

Updated the application version from 0.8.3 to 0.8.4 in both `package.json` and `Config.ts`. This increment aligns with recent bug fixes and minor enhancements, ensuring consistency across metadata and configuration.

Version updated to 0.8.3

Version updated to 0.8.2

Version updated to 0.8.1

Version updated to 0.8.0

Version updated to 0.7.1

Version updated to 0.7.0

Version updated to 0.6.4

Version updated to 0.6.3

Version updated to 0.6.2