Backend: - Parse EasyPay `payurl2` field, prefer H5 link on mobile - Add `device=mobile` to EasyPay submit.php (popup) mode - Expand isMobile detection keywords (add ipad/ipod) Frontend: - Add `isMobileDevice()` utility (userAgentData + UA regex) - Mobile + pay_url: direct redirect instead of QR/popup - Popup blocked fallback: auto-redirect when window.open fails - Stripe WeChat Pay: dynamic client param (mobile_web vs web)
Add a full payment and subscription system supporting EasyPay (Alipay/WeChat), Stripe, and direct Alipay/WeChat Pay providers with multi-instance load balancing.
