Redesign Kindness UI and simplify layouts

[meenbeese]

Refactored the Kindness fragment layout for improved readability and modernized UI. Replaced nested ConstraintLayouts with simpler layouts, introduced card-based sections, and improved spacing and typography.

Continuation of #1516, #1670

Tested on Pixel 9a API 36.

Before	After

[bitmold]

Thanks, I'm actually in the process of implementing a new redesign for kindness mode, but for the time being this is a solid improvement and I'd love to ship it in the next release of the app.

[meenbeese]

Thanks, I'm actually in the process of implementing a new redesign for kindness mode, but for the time being this is a solid improvement and I'd love to ship it in the next release of the app.

It would be great if you created a draft PR when the design is ready so I can give my input on it as well.