do not allow to skip required field with whitespace

app/javascript/submission_form/form.vue

@@ -471,10 +471,14 @@ import i18n from './i18n'
 const isEmpty = (obj) => {
   if (obj == null) return true
 
-  if (Array.isArray(obj) || typeof obj === 'string') {
+  if (Array.isArray(obj)) {
     return obj.length === 0
   }
 
+  if (typeof obj === 'string') {
+    return obj.trim().length === 0
+  }
+
   if (typeof obj === 'object') {
     return Object.keys(obj).length === 0
   }

app/javascript/submission_form/text_step.vue

@@ -34,7 +34,7 @@
       class="base-input !text-2xl w-full"
       :class="{ '!pr-11 -mr-10': !field.validation?.pattern }"
       :required="field.required"
-      :pattern="field.validation?.pattern"
+      :pattern="field.validation?.pattern || (field.required ? '.*\\S+.*' : '')"
       :placeholder="`${t('type_here_')}${field.required ? '' : ` (${t('optional')})`}`"
       type="text"
       :name="`values[${field.uuid}]`"