[Learners] Improve the included front-end of the Voice Assistant

[sudiptog81]

MicroByte Title: Building a Decoupled Voice Assistant

Improvement Proposal:

The front-end of the included sample code for the front-end might be buggy. This needs triage and further refining. Optionally, add instructions on how to use the voice assistant in the form of a modal when a user uses the assistant for the first time.

Benefits of proposed improvements:

Learns would gain a better understanding of how the front-end of the application is designed.