fix(docs): guard GTM/Cookiebot blocks with {% if gtm_id %}

Prevents broken googletagmanager.com requests with empty container IDs
when GTM_ID is not set (local builds, preview environments).

🤖 Generated by [robots](https://vyos.io)

1 files changed, 4 insertions, 1 deletions

diff --git a/docs/_templates/layout.html b/docs/_templates/layout.html
index a2b50be3..e4781d89 100644
--- a/docs/_templates/layout.html
+++ b/docs/_templates/layout.html
@@ -1,6 +1,7 @@
 {% extends "!layout.html" %}
 {%- set current_version = "1.4.x sagitta" %}
 {% block extrahead %}
+    {% if gtm_id %}
     {# Cookiebot CMP — must load first so its auto-blocker can scan/block other tags #}
     <script id="Cookiebot"
             src="https://consent.cookiebot.com/uc.js"
@@ -31,6 +32,7 @@
     j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
     'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
     })(window,document,'script','dataLayer','{{ gtm_id }}');</script>
+    {% endif %}
 
     <style>#vyos-header-iframe{position:fixed;top:0;left:0;right:0;z-index:999999999;width:100%;border:none}</style>
     <style>#vyos-footer-iframe{width:100%;border:none}</style>
@@ -62,9 +64,10 @@
 {% endblock %}
 
 {% block body %}
-    {# GTM noscript fallback #}
+    {% if gtm_id %}
     <noscript><iframe src="https://www.googletagmanager.com/ns.html?id={{ gtm_id }}"
                       height="0" width="0" style="display:none;visibility:hidden"
                       title="Google Tag Manager"></iframe></noscript>
+    {% endif %}
     {{ super() }}
 {% endblock %}