add minimum duration for DOM parser

lib/services/dom-parser.js

@@ -20,9 +20,11 @@ const parseDate = (timeText = '') => {
   const normalizedEndTime = endTime.isValid() ? endTime : dayjs(new Date())
   const { start, duration } = parseDates(normalizedStartTime, normalizedEndTime)
 
+  const minimumDuration = { ...duration, minutes: duration.minutes || 120 }
+
   return {
     start,
-    duration,
+    duration: minimumDuration,
   }
 }