feat: flatten RPM config fields in Account DTO

backend/internal/handler/dto/mappers.go

@@ -209,6 +209,13 @@ func AccountFromServiceShallow(a *service.Account) *Account {
 		if idleTimeout := a.GetSessionIdleTimeoutMinutes(); idleTimeout > 0 {
 			out.SessionIdleTimeoutMin = &idleTimeout
 		}
+		if rpm := a.GetBaseRPM(); rpm > 0 {
+			out.BaseRPM = &rpm
+			strategy := a.GetRPMStrategy()
+			out.RPMStrategy = &strategy
+			buffer := a.GetRPMStickyBuffer()
+			out.RPMStickyBuffer = &buffer
+		}
 		// TLS指纹伪装开关
 		if a.IsTLSFingerprintEnabled() {
 			enabled := true

backend/internal/handler/dto/types.go

@@ -153,6 +153,12 @@ type Account struct {
 	MaxSessions           *int `json:"max_sessions,omitempty"`
 	SessionIdleTimeoutMin *int `json:"session_idle_timeout_minutes,omitempty"`
 
+	// RPM 限制（仅 Anthropic OAuth/SetupToken 账号有效）
+	// 从 extra 字段提取，方便前端显示和编辑
+	BaseRPM         *int    `json:"base_rpm,omitempty"`
+	RPMStrategy     *string `json:"rpm_strategy,omitempty"`
+	RPMStickyBuffer *int    `json:"rpm_sticky_buffer,omitempty"`
+
 	// TLS指纹伪装（仅 Anthropic OAuth/SetupToken 账号有效）
 	// 从 extra 字段提取，方便前端显示和编辑
 	EnableTLSFingerprint *bool `json:"enable_tls_fingerprint,omitempty"`