Refine monthly close cleanup

frontend/src/api.ts

@@ -284,6 +284,13 @@ export function updateTicketDayBilling(ticketId: string, day: string, billedMinu
   });
 }
 
+export function acknowledgeMissingTicketDayBilling(ticketId: string, day: string, acknowledged = true) {
+  return request(`/api/tickets/${ticketId}/day-billings/${day}/acknowledgement`, {
+    method: "PATCH",
+    body: JSON.stringify({ acknowledged })
+  });
+}
+
 export function getMonthOverview(month: string) {
   return getPeriodOverview("month", month);
 }