fix: 修复支付页测试/生产 Product 映射串用与无法保存

切换环境时先暂存再切换；后端 Profile 不再串用另一侧商品；支持一键填充 OpsXshell 与跨环境复制，调试使用当前页映射。

backend/internal/service/payment/waffo.go

@@ -37,6 +37,7 @@ type WaffoProductMapping struct {
 	PlanKey   string `json:"plan_key"`
 	Label     string `json:"label,omitempty"`
 	ProductID string `json:"product_id"`
+	Currency  string `json:"currency,omitempty"`
 }
 
 // WaffoPublicMeta 存入 payment_gateway_configs.public_key 的 JSON（无私钥） // Logan.Li
@@ -416,6 +417,11 @@ func ResolveProductID(cfg WaffoConfig, planType string) string {
 	return productIDForPlan(cfg, planType)
 }
 
+// ResolveCurrency 按 plan_type 解析结算货币 // Logan.Li
+func ResolveCurrency(cfg WaffoConfig, planType string) string {
+	return currencyForPlan(cfg, planType)
+}
+
 func productIDForPlan(cfg WaffoConfig, planType string) string {
 	plan := strings.TrimSpace(strings.ToLower(planType))
 	if plan == "" {

backend/internal/service/payment/waffo_api.go

@@ -86,7 +86,11 @@ func CreateCheckoutSession(cfg WaffoConfig, req CreateSessionRequest) (*CreateSe
 		if env == "" {
 			env = strings.TrimSpace(cfg.Environment)
 		}
-		if env == "" {
+		// Waffo Store Slug 鉴权要求 X-Environment 为 test|prod（不是 live） // Logan.Li
+		switch strings.ToLower(env) {
+		case "live", "prod", "production":
+			env = "prod"
+		default:
 			env = "test"
 		}
 		httpReq.Header.Set("X-Store-Slug", slug)