[Feature Request]: Modern UI improvement and custom sound enhancement

[Mdskun]

Is your feature request related to a problem? Please describe.
UI was Okey. Just thought to improve. I really wanted custom sound for inhale and exhale except default sound.

Describe the solution you'd like
Morden UI and option to add/remove custom sound

Additional context
I never contributed on opensource projects before but i already improved app quite much in my forked repo screenshots are below.
i tested on android you and UI is far too customizable and also custom sound(s) can be added as well

[jithware]

At first glance, it looks quite good! A couple of first passes...

• all text and icons should remain stationary and not move with the animated circle (compare to original).
• in the original, the circle on exhale reduced to nothing. this would no longer match the WearOS version if implemented
• there is supposed to be an outer ring added in [Feature Request]: Breathing animation circle outer edge #134.
• 20 preferences may be a bit much, perhaps 8?
• tests in the test folder need to be updated with new tests as they are required on push and pull requests
• languages would need to be updated with any new strings added
• haven't checked, but assume this would add a new permission to access filesystem? see implications in Brethap Permissions #107

[Mdskun]

At first glance, it looks quite good! A couple of first passes...

• all text and icons should remain stationary and not move with the animated circle (compare to original). done
• in the original, the circle on exhale reduced to nothing. this would no longer match the WearOS version if implemented done (tested on Android don't know about wear OS)
• there is supposed to be an outer ring added in [Feature Request]: Breathing animation circle outer edge #134. done

• 20 preferences may be a bit much, perhaps 8? done

• tests in the test folder need to be updated with new tests as they are required on push and pull requests done (I updated tests)
• languages would need to be updated with any new strings added I think it's fully updated but still not that sure
• haven't checked, but assume this would add a new permission to access filesystem? see implications in Brethap Permissions #107 Technically no additional permission required (file_picker package will use storage access framework which will open file manager by OS and then it will copy selected file to app's internal storage then it can freely use file)

[jithware]

Wow nice quick turnaround! Some additional things:

• the outer ring should show/hide on tap status
• Preferences-> Duration TTS and Breath TTS need to expand to align left/right with other fields (see preferences screenshot)
• run the following commands and fix any issues (you may want to first run on master, then on your fork to see how it should behave):
  • Unit tests: flutter test
  • Integration tests: flutter test integration_test/app_test.dart
  • Demo app (for screenshots): flutter drive --no-pub --driver=integration_test/driver.dart --target=integration_test/demo_test.dart
• Should probably have both unit and integration tests for any new widgets you added, with the goal being to identify any future changes that break the new changes you've made. It is difficult in flutter, for example, to integration test something like open an audio file and play, but anything you can add that will help protect your changes would be very helpful. You can go through the testing directories above and follow along how some of the other widgets are tested

I will be creating a new branch for this update. This will be a major upgrade, so I'll name it something like 2.0.0. I have some merging/releasing I need to do to the fdroid branch first, but once done and things look good, I'll have you do a pull request to the new branch.

There will eventually be the painful and tedious process of creating video demos and screenshots for all languages and all device types. If you have the time to get a jump on it, here is how to create screenshots and videos.

[Mdskun]

Wow nice quick turnaround! Some additional things:

• the outer ring should show/hide on tap status done:to
• Preferences-> Duration TTS and Breath TTS need to expand to align left/right with other fields (see preferences screenshot) done
• run the following commands and fix any issues (you may want to first run on master, then on your fork to see how it should behave):
  • Unit tests: flutter test
  • Integration tests: flutter test integration_test/app_test.dart
  • Demo app (for screenshots): flutter drive --no-pub --driver=integration_test/driver.dart --target=integration_test/demo_test.dart

UPDATED SO ABOVE THREE COMMANDS ARE WORKING PROPERLY THE LAST TIME I CHECKED

well it was indeed painful process for tests because of preference and UI changing test added.
for audio file test couldn't be added because how can i automatically a "custom audio file" will be provided ? If we do add then it will be same as tone changing test.
I tested things on my own Android device.
There were some tests which failed due to my device incompatible watchAPI or something also some zombie processes made app little slow so just tried fixing that and made "some" changes.
after 4-5 loops of (think,solve/code,integration test,test on device) i came to this last code working on Android and passing the "tests" and it is "working".