fix: form group styles provided by parent components should not cascade

src/components/generic/FormGroup.vue

@@ -56,7 +56,7 @@
 </template>
 
 <script lang="ts" setup>
-import { computed, inject, useSlots } from 'vue'
+import { computed, inject, provide, useSlots } from 'vue'
 import { useI18n } from '@/i18n'
 import { useId } from '@/util'
 import SaveIndicator from '@/components/generic/SaveIndicator.vue'
@@ -113,4 +113,7 @@ const controlAttributes = computed(() => ({
   'aria-describedby': hasErrors.value ? errorsId.value : '',
   id: id.value,
 }))
+
+// don’t cascade formGroupClass to nested FormGroup instances
+provide('formGroupClass', undefined)
 </script>