Build a clear screen-reader label for a send button.
Write `sendButtonLabel(amount, symbol, recipient)` returning `` `Send ${amount} ${symbol} to ${shortenAddress(recipient)}` `` — reuse a local `shortenAddress` helper (first 6 + last 4 chars joined by `…`).
Required in your answer: shortenAddress(
Transpiled, then run in a sandbox
function shortenAddress(addr) {
// TODO
}
function sendButtonLabel(amount, symbol, recipient) {
// TODO
}
