feat: add admin order refund flow

Co-authored-by: multica-agent <github@multica.ai>

internal/handler/routes.go

@@ -250,6 +250,9 @@ func RegisterHandlers(router *gin.Engine, serverCtx *svc.ServiceContext) {
 		// Filter commission log
 		adminLogGroupRouter.GET("/commission/list", adminLog.FilterCommissionLogHandler(serverCtx))
 
+		// Filter order refund log
+		adminLogGroupRouter.GET("/order/refund/list", adminLog.FilterOrderRefundLogHandler(serverCtx))
+
 		// Filter email log
 		adminLogGroupRouter.GET("/email/list", adminLog.FilterEmailLogHandler(serverCtx))
 
@@ -341,6 +344,9 @@ func RegisterHandlers(router *gin.Engine, serverCtx *svc.ServiceContext) {
 		// Update order status
 		adminOrderGroupRouter.PUT("/status", adminOrder.UpdateOrderStatusHandler(serverCtx))
 
+		// Refund order
+		adminOrderGroupRouter.POST("/refund", adminOrder.RefundOrderHandler(serverCtx))
+
 		// Manually activate order
 		adminOrderGroupRouter.POST("/activate", adminOrder.ActivateOrderHandler(serverCtx))
 	}