want to fix focus music in pomodoro timer

## Describe the bug
when clicking on the play button nothing is working it seems like it has an issue. I would like to resolve it.

## Steps to reproduce
Steps to reproduce the behavior:
1. Go to 'pomodoro timer tab'
2. Click on 'play'
3. Observe the issue

## Expected behavior
i want the music to play

## Actual behavior
it wasn't playing any music

Open the pomodoro timer tab and reproduce the failure by clicking Play. Confirm the work is done when the focus music starts playing as expected.

Written by the indexing model from the issue text.