fix: pass context.Context to alipay TradePreCreate call

The smartwalle/alipay/v3 Client.TradePreCreate method signature requires
a context.Context as its first argument. Add a Ctx field to
UserRechargeLinkReq, populate it from the HTTP request context in Bind,
and forward it to the TradePreCreate call to fix the build failure.

internal/model/web/alipay.go

@@ -27,8 +27,9 @@ type UserWalletBillsResp base.PageResp
 
 type UserRechargeLinkReq struct {
 	BaseInfo `json:"-" form:"-" binding:"-"`
-	Host     string `json:"-" form:"-" binding:"-"`
-	Amount   int64  `json:"amount" form:"amount" binding:"required"`
+	Ctx      context.Context `json:"-" form:"-" binding:"-"`
+	Host     string          `json:"-" form:"-" binding:"-"`
+	Amount   int64           `json:"amount" form:"amount" binding:"required"`
 }
 
 type UserRechargeLinkResp struct {
@@ -82,6 +83,7 @@ func (r *UserWalletBillsReq) Bind(c *gin.Context) error {
 
 func (r *UserRechargeLinkReq) Bind(c *gin.Context) error {
 	r.Host = c.Request.Host
+	r.Ctx = c.Request.Context()
 	return bindAny(c, r)
 }
 

internal/servants/web/alipay.go

@@ -80,7 +80,7 @@ func (s *alipayPrivSrv) UserRechargeLink(req *web.UserRechargeLinkReq) (*web.Use
 	p.Subject = "PaoPao用户钱包充值"
 	p.TotalAmount = fmt.Sprintf("%.2f", float64(recharge.Amount)/100.0)
 	p.NotifyURL = "https://" + req.Host + "/v1/alipay/notify"
-	rsp, err := s.alipayClient.TradePreCreate(p)
+	rsp, err := s.alipayClient.TradePreCreate(req.Ctx, p)
 	if err != nil {
 		logrus.Errorf("client.TradePreCreate err: %v\n", err)
 		return nil, web.ErrRechargeReqFail