feat: add the admin layout shell

templates/base.html.twig

@@ -1,24 +1,23 @@
 <!DOCTYPE html>
-<html>
+<html lang="de">
     <head>
         <meta charset="UTF-8">
-        <title>{% block title %}Welcome!{% endblock %}</title>
-        <link rel="icon" href="data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 128 128%22><text y=%221.2em%22 font-size=%2296%22>⚫️</text><text y=%221.3em%22 x=%220.2em%22 font-size=%2276%22 fill=%22%23fff%22>sf</text></svg>">
-        {% block stylesheets %}
-        {% endblock %}
+        <meta name="viewport" content="width=device-width, initial-scale=1.0">
+        {# Internal tool -- keep it out of search engines. #}
+        <meta name="robots" content="noindex,nofollow">
+        <title>{% block title %}ephub{% endblock %}</title>
+        <link rel="icon" href="data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 128 128%22><text y=%221.15em%22 font-size=%2296%22>🪑</text></svg>">
+
+        {# The Tailwind build is pulled in by assets/app.js's `import './styles/app.css'`,
+           so importmap() emits the <link> for it. This block is for anything outside that graph. #}
+        {% block stylesheets %}{% endblock %}
 
         {% block javascripts %}
             {% block importmap %}{{ importmap('app') }}{% endblock %}
         {% endblock %}
-
-        {% set frankenphp_hot_reload = app.request.server.get('FRANKENPHP_HOT_RELOAD') %}
-        {% if frankenphp_hot_reload %}
-        <meta name="frankenphp-hot-reload:url" content="{{ frankenphp_hot_reload }}">
-        <script src="https://cdn.jsdelivr.net/npm/idiomorph"></script>
-        <script src="https://cdn.jsdelivr.net/npm/frankenphp-hot-reload/+esm" type="module"></script>
-        {% endif %}
     </head>
-    <body>
+    {# No hx-boost: htmx handles fragments only, the browser owns navigation. #}
+    <body class="bg-white text-gray-700 font-sans antialiased">
         {% block body %}{% endblock %}
     </body>
 </html>