新增支付宝当面付充值与前端二维码流程

[JLBcode-code]

当面付无需签名与实体公司执照，面向独立开发者的首选支付方式
变更内容

• 新增当面付支付接口与回调处理
• 前端新增二维码支付与超时重试
• 支付设置与多语言文案更新

测试

• 本地手动测试：创建二维码、超时重试、支付回调更新

Summary by CodeRabbit

• New Features
  • Added Alipay Face-to-Face payment support as a new recharge method.
  • Implemented QR code-based payment flow with automatic expiration and retry capabilities.
  • Added payment settings interface to configure Alipay F2F credentials.
  • Introduced discount display in payment confirmation modal.
  • Extended multilingual support across all payment interfaces (English, French, Japanese, Russian, Vietnamese, Chinese).

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