[Feature] Add China-friendly payment options for ZenNotes Cloud (Alipay / WeChat Pay) #950

I would like to subscribe to ZenNotes Cloud, but the current Stripe Checkout only offers card payment. My China-issued credit card is declined, so I currently have no practical way to complete the subscription.

This may also affect other users in mainland China, where Alipay and WeChat Pay are widely used and internationally enabled credit cards are not always available or accepted.

Could ZenNotes Cloud support at least one payment method that is accessible to users in mainland China, ideally:

• Alipay
• WeChat Pay

If recurring wallet payments are not available for the current Stripe account or subscription setup, an annual prepaid option with manual renewal through Alipay or WeChat Pay would also solve this use case. Another broadly accessible option, such as UnionPay or PayPal, could be an alternative.