Chore: hide sub nav for 404 page (#6622)

* Chore: hide sub nav for 404 page

Signed-off-by: thisisobate <obasiuche62@gmail.com>

* fix: add custom 404 template override to hide sticky sub-nav

Signed-off-by: thisisobate <obasiuche62@gmail.com>

---------

Signed-off-by: thisisobate <obasiuche62@gmail.com>

Author: thisisobate

overrides/404.html

@@ -0,0 +1,12 @@
+{% extends "main.html" %}
+{% block header %}
+  {% set is_404_page = true %}
+  {% include "partials/header.html" %}
+{% endblock %}
+
+{% block tabs %}
+{% endblock %}
+
+{% block content %}
+  <h1>404 - Not found</h1>
+{% endblock %}

overrides/partials/header.html

@@ -143,7 +143,7 @@
   </nav>
 
   <!-- Sub Navigation tabs (sticky) -->
-  {% if not page.is_homepage %}
+  {% if not page.is_homepage and not (is_404_page | default(false)) %}
     {% if "navigation.tabs.sticky" in features %}
       {% if "navigation.tabs" in features %}
         {% include "partials/tabs.html" %}