Add complete page-header-data for unified navigation

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: JakeSCahill

antora.yml

@@ -10,8 +10,13 @@ asciidoc:
     page-release-date: 2025-07-31
     # Only used in the main branch (latest version)
     page-header-data:
+      title: "Streaming"
+      section: "Data Platform"
+      parent-component: "self-managed"
+      description: "Redpanda broker and rpk CLI for self-managed deployments."
+      color: "#107569"
       order: 2
-      color: '#107569'
+      icon: "activity"
     # Name of the Redpanda UI used in single-sourced content with Redpanda Cloud.
     ui: Redpanda Console@
     # Fallback versions