ankidroid/anki-android — reverse-engineered prompt

Build me an Android flashcard app for studying and memorizing anything, similar to AnkiDroid. I want users to create decks, add cards with text, images, sound, and MathJax, then review them with spaced repetition so hard cards come back sooner and easy cards come back later.

Please include a clean deck list, a review screen, card adding and editing, night mode, optional typed answers, text to speech, a simple whiteboard for drawing during review, progress widgets, and detailed study stats. Users should be able to browse or import premade decks, sync their collection with AnkiWeb, and add cards from other apps like dictionaries through Android sharing or intents.

Make it feel like a real Android app, not just a demo. Use Kotlin and modern Android practices, keep the UI friendly for learners, and look up current Android docs online if you need to.