fix(docs): revert sidebar.tabs migration to keep deploy compat

The top-level tabs prop is only on fumadocs-ui 16.7+; deploy env was
still resolving an older type and failing typecheck. sidebar.tabs is
deprecated but still functional — keep it for now.

Author: waleedlatif1

apps/docs/app/[lang]/layout.tsx

@@ -105,11 +105,11 @@ export default async function Layout({ children, params }: LayoutProps) {
           <Navbar />
           <DocsLayout
             tree={source.pageTree[lang]}
-            tabs={false}
             nav={{
               title: <SimLogoFull className='h-[22px] w-auto' />,
             }}
             sidebar={{
+              tabs: false,
               defaultOpenLevel: 0,
               collapsible: false,
               footer: null,