fix wxpay config contract and h5 scene info

backend/internal/payment/provider/wxpay.go

@@ -250,13 +250,12 @@ func (w *Wxpay) prepayNative(ctx context.Context, c *core.Client, req payment.Cr
 func (w *Wxpay) prepayH5(ctx context.Context, c *core.Client, req payment.CreatePaymentRequest, notifyURL string, totalFen int64) (*payment.CreatePaymentResponse, error) {
 	svc := h5.H5ApiService{Client: c}
 	cur := wxpayCurrency
-	tp := wxpayH5Type
 	resp, _, err := wxpayH5Prepay(ctx, svc, h5.PrepayRequest{
 		Appid: core.String(w.config["appId"]), Mchid: core.String(w.config["mchId"]),
 		Description: core.String(req.Subject), OutTradeNo: core.String(req.OrderID),
 		NotifyUrl: core.String(notifyURL),
 		Amount:    &h5.Amount{Total: core.Int64(totalFen), Currency: &cur},
-		SceneInfo: &h5.SceneInfo{PayerClientIp: core.String(req.ClientIP), H5Info: &h5.H5Info{Type: &tp}},
+		SceneInfo: &h5.SceneInfo{PayerClientIp: core.String(req.ClientIP), H5Info: buildWxpayH5Info(w.config)},
 	})
 	if err != nil {
 		return nil, fmt.Errorf("wxpay h5 prepay: %w", err)
@@ -272,6 +271,18 @@ func (w *Wxpay) prepayH5(ctx context.Context, c *core.Client, req payment.Create
 	return &payment.CreatePaymentResponse{TradeNo: req.OrderID, PayURL: h5URL}, nil
 }
 
+func buildWxpayH5Info(config map[string]string) *h5.H5Info {
+	tp := wxpayH5Type
+	info := &h5.H5Info{Type: &tp}
+	if appName := strings.TrimSpace(config["h5AppName"]); appName != "" {
+		info.AppName = core.String(appName)
+	}
+	if appURL := strings.TrimSpace(config["h5AppUrl"]); appURL != "" {
+		info.AppUrl = core.String(appURL)
+	}
+	return info
+}
+
 func resolveWxpayCreateMode(req payment.CreatePaymentRequest) (string, error) {
 	if strings.TrimSpace(req.OpenID) != "" {
 		return wxpayModeJSAPI, nil

backend/internal/payment/provider/wxpay_test.go

@@ -487,3 +487,86 @@ func TestCreatePaymentWithOpenIDReturnsJSAPIResult(t *testing.T) {
 		t.Fatalf("jsapi paySign = %q, want %q", resp.JSAPI.PaySign, "signed-payload")
 	}
 }
+
+func TestCreatePaymentMobileH5IncludesConfiguredSceneInfo(t *testing.T) {
+	origJSAPIPrepay := wxpayJSAPIPrepayWithRequestPayment
+	origNativePrepay := wxpayNativePrepay
+	origH5Prepay := wxpayH5Prepay
+	t.Cleanup(func() {
+		wxpayJSAPIPrepayWithRequestPayment = origJSAPIPrepay
+		wxpayNativePrepay = origNativePrepay
+		wxpayH5Prepay = origH5Prepay
+	})
+
+	jsapiCalls := 0
+	nativeCalls := 0
+	h5Calls := 0
+	wxpayJSAPIPrepayWithRequestPayment = func(ctx context.Context, svc jsapi.JsapiApiService, req jsapi.PrepayRequest) (*jsapi.PrepayWithRequestPaymentResponse, *core.APIResult, error) {
+		jsapiCalls++
+		return &jsapi.PrepayWithRequestPaymentResponse{}, nil, nil
+	}
+	wxpayNativePrepay = func(ctx context.Context, svc native.NativeApiService, req native.PrepayRequest) (*native.PrepayResponse, *core.APIResult, error) {
+		nativeCalls++
+		return &native.PrepayResponse{}, nil, nil
+	}
+	wxpayH5Prepay = func(ctx context.Context, svc h5.H5ApiService, req h5.PrepayRequest) (*h5.PrepayResponse, *core.APIResult, error) {
+		h5Calls++
+		if req.SceneInfo == nil {
+			t.Fatal("expected scene_info, got nil")
+		}
+		if got := wxSV(req.SceneInfo.PayerClientIp); got != "203.0.113.10" {
+			t.Fatalf("scene_info payer_client_ip = %q, want %q", got, "203.0.113.10")
+		}
+		if req.SceneInfo.H5Info == nil {
+			t.Fatal("expected scene_info.h5_info, got nil")
+		}
+		if got := wxSV(req.SceneInfo.H5Info.Type); got != wxpayH5Type {
+			t.Fatalf("scene_info.h5_info.type = %q, want %q", got, wxpayH5Type)
+		}
+		if got := wxSV(req.SceneInfo.H5Info.AppName); got != "Sub2API" {
+			t.Fatalf("scene_info.h5_info.app_name = %q, want %q", got, "Sub2API")
+		}
+		if got := wxSV(req.SceneInfo.H5Info.AppUrl); got != "https://app.example.com" {
+			t.Fatalf("scene_info.h5_info.app_url = %q, want %q", got, "https://app.example.com")
+		}
+		return &h5.PrepayResponse{
+			H5Url: core.String("https://wx.tenpay.example/h5pay?prepay_id=1"),
+		}, nil, nil
+	}
+
+	provider := &Wxpay{
+		config: map[string]string{
+			"appId":     "wx123",
+			"mchId":     "mch123",
+			"h5AppName": "Sub2API",
+			"h5AppUrl":  "https://app.example.com",
+		},
+		coreClient: &core.Client{},
+	}
+
+	resp, err := provider.CreatePayment(context.Background(), payment.CreatePaymentRequest{
+		OrderID:     "sub2_99",
+		Amount:      "66.88",
+		PaymentType: payment.TypeWxpay,
+		Subject:     "Balance Recharge",
+		NotifyURL:   "https://merchant.example/payment/notify",
+		ReturnURL:   "https://merchant.example/payment/result?resume_token=resume-99",
+		ClientIP:    "203.0.113.10",
+		IsMobile:    true,
+	})
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if jsapiCalls != 0 {
+		t.Fatalf("jsapi prepay calls = %d, want 0", jsapiCalls)
+	}
+	if nativeCalls != 0 {
+		t.Fatalf("native prepay calls = %d, want 0", nativeCalls)
+	}
+	if h5Calls != 1 {
+		t.Fatalf("h5 prepay calls = %d, want 1", h5Calls)
+	}
+	if !strings.Contains(resp.PayURL, "redirect_url=") {
+		t.Fatalf("pay_url = %q, want redirect_url query appended", resp.PayURL)
+	}
+}