adds calendarStartDate and calendarEndDate attrs to learner-group and offering calendars.

since we're dealing with offering-based events only here, we can default
these attrs to startDate and endDate directly. no edge-case logic
needed.

Author: stopfstedt

packages/frontend/app/components/learner-group/calendar.gjs

@@ -64,6 +64,8 @@ export default class LearnerGroupCalendarComponent extends Component {
       return {
         startDate: offering.startDate.toISOString(),
         endDate: offering.endDate.toISOString(),
+        calendarStartDate: offering.startDate.toISOString(),
+        calendarEndDate: offering.endDate.toISOString(),
         courseTitle: course.title,
         name: session.title,
         offering: offering.id,

packages/ilios-common/addon/components/offering-calendar.gjs

@@ -44,6 +44,8 @@ export default class OfferingCalendar extends Component {
           return {
             startDate: DateTime.fromJSDate(offering.startDate).toISO(),
             endDate: DateTime.fromJSDate(offering.endDate).toISO(),
+            calendarStartDate: DateTime.fromJSDate(offering.startDate).toISO(),
+            calendarEndDate: DateTime.fromJSDate(offering.endDate).toISO(),
             courseTitle: course.title,
             name: session.title,
             offering: offering.id,
@@ -71,6 +73,8 @@ export default class OfferingCalendar extends Component {
         return {
           startDate: DateTime.fromJSDate(offering.startDate).toISO(),
           endDate: DateTime.fromJSDate(offering.endDate).toISO(),
+          calendarStartDate: DateTime.fromJSDate(offering.startDate).toISO(),
+          calendarEndDate: DateTime.fromJSDate(offering.endDate).toISO(),
           courseTitle: course.title,
           name: session.title,
           offering: offering.id,
@@ -84,6 +88,8 @@ export default class OfferingCalendar extends Component {
       this.currentEvent = {
         startDate: DateTime.fromJSDate(startDate).toISO(),
         endDate: DateTime.fromJSDate(endDate).toISO(),
+        calendarStartDate: DateTime.fromJSDate(startDate).toISO(),
+        calendarEndDate: DateTime.fromJSDate(endDate).toISO(),
         courseTitle: course.title,
         name: session.title,
         isPublished: session.isPublished,