Add canonical and social SEO meta tags for core page templates

templates/base.html

@@ -5,6 +5,7 @@
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1" />
     <title>{% block title %}No Hype AI{% endblock %}</title>
+    {% block head_meta %}{% endblock %}
     <script nonce="{{ request.csp_nonce|default:'' }}">
       (function(){try{if(localStorage.getItem('theme')==='light'){document.documentElement.classList.remove('dark');}}catch(e){}})();
     </script>