docs(site): give the blog its entry points

- shared nav: a Blog link in baseOptions(), which DocsLayout and every
  HomeLayout (home page, blog index, blog posts) spread
- home closing card: point at /blog/the-ontology-is-the-software instead
  of the external post
- README "You own it": the Read why link targets the new essay

Claude-Session: https://claude.ai/code/session_011hRnra93sK5Q2gTYYTbdJR
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude

README.md

@@ -201,7 +201,7 @@ graph held inside a vendor's system.
 > The ontology is the software. Your objects, relations, actions, permissions,
 > flows, and agent and tool definitions are your business ontology — and the
 > definition layer of the AI era should be an open protocol you own.
-> [Read why](https://www.objectos.ai/en/blog/ai-ontology-open-protocol/).
+> [Read why](https://objectstack.ai/blog/the-ontology-is-the-software).
 
 ## Ship it
 

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

@@ -455,14 +455,14 @@ export default function HomePage() {
               The ontology is the software. Your objects, relations, actions, permissions, and
               flows are your business ontology — views, dashboards, apps, and translations are
               projections of it, and the definition layer of the AI era should be an open
-              protocol you own.{' '}
-              <a
-                href="https://www.objectos.ai/en/blog/ai-ontology-open-protocol/"
+              protocol you own. Read the long form:{' '}
+              <Link
+                href="/blog/the-ontology-is-the-software"
                 className="inline-flex items-center gap-1 font-medium text-fd-foreground underline underline-offset-4 transition-colors hover:text-fd-primary"
               >
-                Read why
+                The Ontology Is the Software
                 <ArrowRight className="size-3.5" />
-              </a>
+              </Link>
             </p>
             <p className="mt-3 text-sm text-fd-muted-foreground">
               ObjectStack is build &amp; ask with Claude Code. Rather build &amp; ask online —

apps/docs/lib/layout.shared.tsx

@@ -23,6 +23,9 @@ export function baseOptions(): BaseLayoutProps {
         </div>
       ),
     },
+    // Every layout spreads baseOptions() — DocsLayout (docs sidebar), and HomeLayout on
+    // the home page and on /blog — so this one entry is the blog's link on all of them.
+    links: [{ text: 'Blog', url: '/blog', active: 'nested-url' }],
     githubUrl: `https://github.com/${gitConfig.user}/${gitConfig.repo}`,
   };
 }