zyronon/TypeWords ? reverse-engineered prompt

Build me a clean English learning web app where people can practice words and short articles one keystroke at a time.

I want it to feel simple and fast, with a nice modern interface, no ads, and everything saved locally so it still works on its own. The main experience should include word practice with a few different study modes like follow along, dictation, self test, and typing from memory. It should also keep track of wrong words, mastered words, and favorites so users can review them later.

For articles, I want a way to read and memorize text sentence by sentence, with pronunciation and optional bilingual help. It should include some built in vocabulary lists for common exams, plus a place to add more words or import articles. Please make the app feel polished, with useful settings, keyboard sound effects, and shortcut controls. If you need to check current docs or best practices while building it, go ahead and look them up online.