feat(payment): add payment settings configuration and update payment methods handling

setting/operation_setting/payment_setting.go

@@ -0,0 +1,23 @@
+package operation_setting
+
+import "one-api/setting/config"
+
+type PaymentSetting struct {
+	AmountOptions  []int           `json:"amount_options"`
+	AmountDiscount map[int]float64 `json:"amount_discount"` // 充值金额对应的折扣，例如 100 元 0.9 表示 100 元充值享受 9 折优惠
+}
+
+// 默认配置
+var paymentSetting = PaymentSetting{
+	AmountOptions:  []int{10, 20, 50, 100, 200, 500},
+	AmountDiscount: map[int]float64{},
+}
+
+func init() {
+	// 注册到全局配置管理器
+	config.GlobalConfig.Register("payment_setting", &paymentSetting)
+}
+
+func GetPaymentSetting() *PaymentSetting {
+	return &paymentSetting
+}