[OP#65516] completely disable resizing for events without start & end times

frontend/src/stimulus/controllers/dynamic/my/time-tracking.controller.ts

@@ -210,6 +210,9 @@ export default class MyTimeTrackingController extends Controller {
           );
         }
 
+        // mark the event explicitly as resizable if it is not an all day event
+        info.event.setProp('durationEditable', !info.event.allDay);
+
         this.calendar.setOption('defaultTimedEventDuration', this.DEFAULT_TIMED_EVENT_DURATION);
       },
       eventClick: (info) => {

lib/full_calendar/event.rb

@@ -57,7 +57,7 @@ module FullCalendar
         "title" => title,
         "url" => url,
         "classNames" => class_names
-      }.merge(additional_attributes).compact_blank.as_json
+      }.merge(additional_attributes).compact.as_json
     end
 
     def to_json(*)

modules/costs/lib/full_calendar/time_entry_event.rb

@@ -47,8 +47,9 @@ module FullCalendar
       end
     end
 
-    def additional_attributes
+    def additional_attributes # rubocop:disable Metrics/AbcSize
       {
+        durationEditable: time_entry.start_time.present?,
         hours: time_entry.hours,
         typeId: time_entry.work_package.type_id,
         workPackageId: time_entry.work_package.id,