feat: 关键词提取

pay.puml

+@startuml
+'https://plantuml.com/sequence-diagram
+
+autonumber
+
+participant User
+participant FrontEnd
+participant BackEnd
+participant Pay
+
+
+
+User -> FrontEnd: 充值权益
+
+FrontEnd -> BackEnd: 获取支付权益套餐信息
+note right of BackEnd: 套餐名、价格、等级【专业版、旗舰版】
+BackEnd -> FrontEnd: 返回权益套餐信息
+
+note right of FrontEnd: 每次切换支付宝或微信都需要重新创建订单
+FrontEnd -> BackEnd: 创建支付订单
+BackEnd -> FrontEnd: 返回支付订单号
+
+FrontEnd -> BackEnd: 获取支付二维码\n(传入渠道码、支付订单号)
+BackEnd -> Pay: 获取渠道支付二维码
+Pay -> BackEnd: 返回二维码URL
+BackEnd -> FrontEnd: 返回二维码URL
+
+FrontEnd -> BackEnd: 轮询订单状态
+User -> FrontEnd: 扫码支付
+
+Pay --> BackEnd: 支付成功回调
+BackEnd -> BackEnd: 修改订单状态、更新用户权益
+
+FrontEnd -> BackEnd: 获取订单状态
+BackEnd -> FrontEnd: 支付成功
+
+@enduml
\ No newline at end of file