Phase 5 + all remaining

inventory-server/dashboard/acot-server/utils/timeUtils.js

@@ -1,4 +1,4 @@
-const { DateTime } = require('luxon');
+import { DateTime } from 'luxon';
 
 const TIMEZONE = 'America/New_York';
 const DB_TIMEZONE = 'UTC-05:00';
@@ -294,19 +294,24 @@ const formatMySQLDate = (input) => {
   return dt.setZone(DB_TIMEZONE).toFormat(DB_DATETIME_FORMAT);
 };
 
-module.exports = {
+// Expose helpers for tests or advanced consumers.
+// Kept as a named `_internal` export so existing destructuring sites
+// (`const { _internal: timeHelpers } = require(...)` → ESM equivalent works)
+// don't need to change beyond the import-statement rewrite.
+const _internal = {
+  getDayStart,
+  getDayEnd,
+  getWeekStart,
+  getRangeForTimeRange,
+  BUSINESS_DAY_START_HOUR,
+};
+
+export {
   getBusinessDayBounds,
   getTimeRangeConditions,
   formatBusinessDate,
   getTimeRangeLabel,
   parseBusinessDate,
   formatMySQLDate,
-  // Expose helpers for tests or advanced consumers
-  _internal: {
-    getDayStart,
-    getDayEnd,
-    getWeekStart,
-    getRangeForTimeRange,
-    BUSINESS_DAY_START_HOUR
-  }
+  _internal,
 };