resized tft display app icons , themes and codecleanup

• made the icons on the physical tft a bit bigger so they’re easier to recognize and use at a glance. they might look a lil pixelated up close bczz of the display resolution, but the goal was to make them more usable

• cleaned up the code in a few places and removing unnecessary comments and organizing things that had become a bit messy while developing

• also added the theme selection and save ui to the web app with 4 preset themes planned for now. the idea is that whichever theme you select should also show up on the physical display. the web side is done, but the actual theme implementation is still in progress. starting with a nothing-inspired black and white theme, while the other themes are still being planned

• and i have also added a subtle, minimal animation on click, so it feels more responsive and gives you that little visual feedback that the click actually registered. Looks pretty good tbh