docs: surface self-hosting on the first fold

Demoting the delivery surfaces hid "you can run it yourself" until you
scroll. Make the hosted-vs-self-hosted choice obvious without restoring
tooling-first sidebar ordering:

- Add a Self-host link to the top navbar (visible on every page)
- Add a hosted-or-self-hosted callout directly under the Overview hero

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

apps/docs/docs.json

@@ -43,6 +43,10 @@
 	"name": "supermemory | Memory API for the AI era",
 	"navbar": {
 		"links": [
+			{
+				"href": "/self-hosting/overview",
+				"label": "Self-host"
+			},
 			{
 				"href": "mailto:support@supermemory.com",
 				"label": "Support"

apps/docs/intro.mdx

@@ -8,6 +8,10 @@ Supermemory is the long-term and short-term memory and context infrastructure fo
 
 With supermemory, you give your agents perfect recall about their users — so they're more intelligent, more personalized, and more consistent. Every piece of the context stack is built in, behind one API.
 
+<Tip>
+**Hosted or self-hosted — same API.** Use the [managed platform](https://console.supermemory.ai) for zero-ops scale, or [run the entire engine on your own machine](/self-hosting/overview) — one binary, zero config, fully offline. Move between them by changing a single `baseURL`.
+</Tip>
+
 ## What you can build with it
 
 <CardGroup cols={2}>