[ENG-601] feat: allow planned encounters (w/ future start date) to transition to cancelled/discontinued/entered in error

src/components/Questionnaire/QuestionTypes/EncounterQuestion.tsx

@@ -135,14 +135,26 @@ export function EncounterQuestion({
   });
 
   useEffect(() => {
+    const isStartDateInFuture =
+      encounter.period.start && new Date(encounter.period.start) > new Date();
+
     if (
       encounter.status === EncounterStatus.DISCHARGED ||
       encounter.status === EncounterStatus.COMPLETED ||
       encounter.status === EncounterStatus.CANCELLED ||
       encounter.status === EncounterStatus.DISCONTINUED ||
       encounter.status === EncounterStatus.ENTERED_IN_ERROR
     ) {
-      if (!encounter.period.end) {
+      if (isStartDateInFuture) {
+        if (encounter.period.end) {
+          handleUpdateEncounter({
+            period: {
+              ...encounter.period,
+              end: undefined,
+            },
+          });
+        }
+      } else if (!encounter.period.end) {
         handleUpdateEncounter({
           period: {
             ...encounter.period,