feat: enable page keepalive

frontend_nuxt/pages/posts/[id]/index.vue

@@ -104,6 +104,12 @@
   </div>
 </template>
 
+<script setup>
+definePageMeta({
+  keepalive: true
+})
+</script>
+
 <script>
 import { ref, computed, onMounted, onBeforeUnmount, nextTick, watch } from 'vue'
 import VueEasyLightbox from 'vue-easy-lightbox'