Attach docsetGroup to flat promoted items so version selection covers them (#123)

A promoted top-level item with no children (a flat page, e.g. a component's
own index or introduction page under page-tabs-promote-all) was pushed into
the tab nav unwrapped, without docsetGroup attached like every other item
shape gets. Both the SSR nav-tree build (docs-ui) and the client nav-fetch
rebuild skip any item lacking docsetGroup when picking which version to show,
so every version's copy of that flat page rendered simultaneously - confirmed
live on development.neo4j.dev's operations-manual/2026.08 pages, which showed
duplicate "The Neo4j Operations Manual" and "Introduction" links pointing at
both /2026.08/ and /5/.

Bump to 0.3.6.

Author: recrwplay

extensions/antora/tabbed-nav/index.js

@@ -560,6 +560,14 @@ module.exports.register = function ({ config }) {
 
               for (const item of promotedItems) {
                 if (!(item.items && item.items.length)) {
+                  // Unlike every other branch here, this item is pushed through
+                  // unwrapped - so it also needs docsetGroup attached directly, or it
+                  // never enters the docsetGroup version-selection logic downstream
+                  // (client nav-fetch and the SSR nav-aggregate helper both skip an
+                  // item with no docsetGroup entirely) and every version's copy of a
+                  // flat promoted page (e.g. a promoteAll'd component index or
+                  // introduction page with no children) shows up simultaneously.
+                  if (versionData.docsetGroup) item.docsetGroup = versionData.docsetGroup
                   tabNav[0].items.push(item)
                   continue
                 }

extensions/antora/tabbed-nav/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@neo4j-antora/tabbed-nav",
-  "version": "0.3.5",
+  "version": "0.3.6",
   "description": "Antora extension, Express middleware, S3 aggregator, and turnkey dev server for tabbed cross-docset navigation across Neo4j docs repos.",
   "main": "index.js",
   "exports": {