feat(web-admin): use duty staff options in schedule dialog

Co-authored-by: Cursor <cursoragent@cursor.com>

web-admin/src/api/duty.ts

@@ -69,3 +69,9 @@ export function deleteDutyAssignment(id: string) {
     url: `/web/admin/duty/assignments/${id}`
   })
 }
+
+export function fetchDutyUserOptions() {
+  return request.get<Array<{ label: string; value: string }>>({
+    url: '/web/admin/duty/users/options'
+  })
+}