Add gallery support for posts

app/templates/layouts/app.html.slim

@@ -25,6 +25,7 @@ html
     link rel="icon" type="image/x-icon" href="/assets/favicon.ico"
 
     script data-domain="dnitza.com" src="https://stats.dnitza.com/js/script.js" defer="true"
+    script src="/assets/gallery.js"
     script src="/assets/index.js"
 
     script src="https://unpkg.com/htmx.org@1.8.4" integrity="sha384-wg5Y/JwF7VxGk4zLsJEcAojRtlVp1FKKdGy1qN+OMtdq72WRvX/EdRdqg/LOhYeV" crossorigin="anonymous"
@@ -32,7 +33,7 @@ html
 
     - if Hanami.app.settings.micropub_pub_key
       link rel="pgpkey" href="/key"
-  body class="bg-white dark:bg-black selection:bg-blue-100 selection:text-blue-900 dark:selection:bg-blue-600 dark:selection:text-blue-100"
+  body class="bg-white dark:bg-black selection:bg-blue-100 selection:text-blue-900 dark:selection:bg-blue-600 dark:selection:text-blue-100" x-data="{ imgModal : false, imgModalSrc : '', imgModalDesc : '' }" x-on:keydown.escape="imgModal=false"
     main class="pb-8 px-4 pt-4 md:pt-8"
       header class="mb-12 max-w-screen-md mx-auto"
         div class="flex items-center mb-8 md:mb-12 text-lg md:text-xl text-gray-400 dark:text-gray-600"