fix(communication): display project chat state and refresh room visibility

frontend/components/columnRenderings/projectChatEnabled.vue

@@ -0,0 +1,9 @@
+<script setup>
+defineProps({ row: { type: Object, required: true } })
+</script>
+
+<template>
+  <span v-if="row.chatEnabled === true" class="text-primary">Ja</span>
+  <span v-else-if="row.chatEnabled === false" class="text-rose-600">Nein</span>
+  <span v-else class="text-gray-500">–</span>
+</template>