feat: 算力引擎 Go 后端核心（new-api）

- 统一 OpenAI 兼容 /v1 中继 + 渠道/额度/令牌/流水
- 各领域包：relay 模型网关、model 数据层、controller 管理 API

setting/operation_setting/payment_setting.go

@@ -0,0 +1,36 @@
+package operation_setting
+
+import "github.com/QuantumNous/new-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
+
+	ComplianceConfirmed    bool   `json:"compliance_confirmed"`
+	ComplianceTermsVersion string `json:"compliance_terms_version"`
+	ComplianceConfirmedAt  int64  `json:"compliance_confirmed_at"`
+	ComplianceConfirmedBy  int    `json:"compliance_confirmed_by"`
+	ComplianceConfirmedIP  string `json:"compliance_confirmed_ip"`
+}
+
+const CurrentComplianceTermsVersion = "v1"
+
+// 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
+}
+
+func IsPaymentComplianceConfirmed() bool {
+	return paymentSetting.ComplianceConfirmed &&
+		paymentSetting.ComplianceTermsVersion == CurrentComplianceTermsVersion
+}