Make role-end null by default

frontend/src/routes/sponsor/guest/newGuestRole/index.tsx

@@ -305,9 +305,6 @@ function NewGuestRole({ guest, reloadGuestInfo }: NewGuestRoleProps) {
             control={control}
             rules={{
               required: true,
-              validate: () =>
-                Number(getValues('start_date')) <=
-                Number(getValues('end_date')),
             }}
             render={({ field }) => (
               <DatePicker

frontend/src/routes/sponsor/register/formData.ts

@@ -3,7 +3,7 @@ export type RegisterFormData = {
   last_name?: string
   role_type?: number
   role_start: Date
-  role_end: Date
+  role_end: Date | null
   contact_person_unit?: string
   comment?: string
   ou_id?: number

frontend/src/routes/sponsor/register/stepPersonForm.tsx

@@ -337,7 +337,7 @@ const StepPersonForm = forwardRef(
                   />
                 )}
               />
-              {!!errors.role_end && errors.role_end.type === 'required' && (
+              {!!errors.role_end && (
                 <Box sx={{ typography: 'caption', color: 'red' }}>
                   {t('validation.roleEndRequired')}
                 </Box>

frontend/src/routes/sponsor/register/stepRegistration.tsx

@@ -38,9 +38,9 @@ export default function StepRegistration() {
     first_name: undefined,
     last_name: undefined,
     role_type: undefined,
-    // Having role_start and role_end to be nullable caused problems when specifying a default value, so instead having them as non-null and use today as the default date here
+    // Having role_start to be nullable caused problems when specifying a default value, so instead having them as non-null and use today as the default date here
     role_start: new Date(),
-    role_end: new Date(),
+    role_end: null,
     comment: undefined,
     ou_id: undefined,
     email: undefined,