amosgyamfi/open-swiftui-animations — reverse-engineered prompt

Build me a SwiftUI demo app that feels like a living gallery of animation ideas I can learn from and reuse in my own apps. I want it to be pure SwiftUI, no extra animation library, and it should showcase a bunch of small expressive effects like loaders, progress and looping states, fade in and fade out, spin, slide to unlock, pulsing hearts, numeric transitions, text typing and erasing, fireworks, rotating text, and a few playful reaction style animations.

Make the app easy to browse, with each animation in its own clean card or screen, plus a short plain English note about what it does and where it would be useful. If possible, include controls so I can replay an animation and tweak timing or springiness to see how it changes. Use newer built in SwiftUI animation features where they make sense, especially for iOS 17 and later, but keep the code readable and educational.

If you need to, look up the current Apple docs online and make it feel polished.