Add EoL notice banner to invui v1 docs

Author: NichtStudioCode

docs/invui/overrides/main.html

@@ -1,6 +1,30 @@
 {% extends "base.html" %}
 
 {% block styles %}
+<style>
+    .eol-banner {
+        background-color: #f39c12;
+        color: #000;
+        padding: 0.5rem 1rem;
+        text-align: center;
+        font-weight: 500;
+        position: fixed;
+        top: 48px; /* Height of the MkDocs Material header */
+        left: 0;
+        right: 0;
+        z-index: 2; /* Lower than sidebar (z-index: 3) and drawer (z-index: 4) */
+    }
+
+    .eol-banner a {
+        color: #000;
+        text-decoration: underline;
+    }
+
+    /* Add padding to content so it's not hidden behind the fixed banner */
+    .md-main {
+        padding-top: 40px;
+    }
+</style>
 <script>
     (function () {
         const savedWidth = localStorage.getItem("md-width") || "slim";
@@ -42,6 +66,11 @@
         }
     })();
 </script>
+<div class="eol-banner">
+    <strong>End of Life Notice:</strong>
+    InvUI v1 will <strong>NOT</strong> be updated to Minecraft v26.1.
+    Consider migrating to <a href="https://docs.xenondevs.xyz/invui2/">InvUI v2</a> or a different inventory GUI library.
+</div>
 {{ super() }}
 {% endblock %}