fix: minor bugs? in v1

[srizvi]

Hey y'all! 👋 (wuddup Shawn!)

Thank you all for your contributions and leadership! After facing some challenges with the CLI initially, tried again today. 🧈 🙌🏽

🐛 Checkout & Currency Issues? Addressed

Resolved two issues while testing locally:

1. Polar Checkout Error

Removed unsupported subscriptionId parameter from checkout creation. The polar API changed:

const checkout = await createCheckout({
  customerEmail: user.email,
  productPriceId: price.polarId,
  successUrl: `${env.SITE_URL}/settings/billing`,
- subscriptionId: user.subscription?.polarId, // Deleted this line
});

2. Currency Locale Error

Simplified getLocaleCurrency() to return USD only (Polar's current support):

export function getLocaleCurrency() {
  return CURRENCIES.USD;

  // Future implementation for multi-currency support:
  /*
  if (typeof window !== 'undefined') {
    return navigator.languages.includes("it-IT")
      ? CURRENCIES.EUR  // My friends from 🇮🇹 can pay in Euro
      : CURRENCIES.USD;
  }
  return CURRENCIES.USD;
  */
}

Thanks again for the awesome work on this. Please ignore me if I'm way off base.