Memory Game in JavaScript

Another machine-coding favorite: a memory game. Twelve cards lie face down in a fixed order, the words in CARDS. The player turns two cards per move: if their words match, the pair stays face up; if not, both turn back after one second. Three states keep track: turned (the cards turned in this move), matched (the pairs found so far), both holding indexes into CARDS, and moves.

A change that should happen later goes in a timer. setTimeout takes a function and a delay in milliseconds, and runs the function once that time has passed. A Copy button, for example, can say "Copied" and go back by itself:

function copy() {
  setLabel("Copied");
  setTimeout(() => setLabel("Copy"), 2000);
}

While two different cards wait for their timer, a click on a third card must do nothing. A found pair goes into matched, so turned is empty for the next move. The check runs the page's clock itself (500 ms pass) and must print (shortened):

> open the page     text: Moves: 0, button: Card 1 … button: Card 12
> click "Card 1"    - button: Card 1   + button: Mug
> click "Card 2"    - text: Moves: 0   + text: Moves: 1   - button: Card 2   + button: Lamp
> click "Card 3"    screen: no change
> 500 ms pass       screen: no change
> 500 ms pass       - button: Mug   + button: Card 1   - button: Lamp   + button: Card 2
> click "Card 1"    - button: Card 1   + button: Mug
> click "Card 5"    - text: Moves: 1   + text: Moves: 2   - button: Card 5   + button: Mug
> click "Mug"       screen: no change
… the player finds the other pairs …
> click "Card 12"   - text: Moves: 8   + text: You won in 9 moves   - button: Card 12   + button: Stapler

Your task: in src/App.jsx, finish turn: stop after the first card of a move, turn two different cards back after 1000 ms, ignore clicks while two cards are up, keep a found pair in matched and count the moves. Then show Moves: n, or You won in n moves once every card is matched.

Assignment
Follow the Coding Tutorial to compare the two turned cards, turn a wrong pair back with a timer, keep a right pair face up, count the moves and show the win.

Hint
A move ends when its second card turns: that's where moves goes up and where you compare CARDS[first] with CARDS[second]. Each early return in turn stops the lines below it from running.