respect explicitely disabled searchbox in navbar

Same fix as for sidebar in 0ba4ad1

Author: cderv

news/changelog-1.6.md

@@ -104,6 +104,7 @@ All changes included in 1.6:
 - ([#10567](https://github.com/quarto-dev/quarto-cli/issues/10567)): Generate breadcrumbs correctly for documents using a level-1 heading as the title.
 - ([#10616](https://github.com/quarto-dev/quarto-cli/issues/10268)): Add a `z-index` setting to the 'back to top' button to ensure it is always visible.
 - ([#10864](https://github.com/quarto-dev/quarto-cli/issues/10864)): Support detection of `og:image:alt` attribute from auto-discovered images.
+- ([#9905](https://github.com/quarto-dev/quarto-cli/issues/9905)): Setting `search: false` in `navbar` config for `website` in `_quarto.yml` correctly opt-out sidebar.
 
 ### Quarto Blog
 

src/project/types/website/website-navigation.ts

@@ -1232,7 +1232,9 @@ async function navbarEjsData(
   const searchOpts = await searchOptions(project);
   const data: Navbar = {
     ...navbar,
-    search: searchOpts && searchOpts.location === "navbar"
+    search: navbar.search !== undefined
+      ? navbar.search
+      : searchOpts && searchOpts.location === "navbar"
       ? searchOpts.type
       : false,
     background: navbar.background || "primary",