docs(mcp): the switch is in Modules, the MCP page shows its state

docs/self-hosting/mcp.md

@@ -30,7 +30,7 @@ Three things must be true before `/mcp` will answer:
 | -------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | **`APP_URL` is set**       | The endpoint fails closed without a pinned canonical origin. `APP_URL` (or `NEXT_PUBLIC_APP_URL`) is the origin every OAuth document and audience check is anchored to — `Host` is never trusted. Without it the surface stays invisible (`404`). |
 | **The global API is on**   | The operator's instance-wide API switch must be enabled (it is by default). With it off, every token path — including `/mcp` — returns `404`.                                                                                                     |
-| **The `mcp` module is on** | A per-account opt-in that ships off by default; you turn it on in Settings. Until then `/mcp` answers `404` for that account.                                                                                                                     |
+| **The `mcp` module is on** | A per-account opt-in that ships off by default; you turn it on in **Settings → Modules**. Until then `/mcp` answers `404` for that account.                                                                                                       |
 
 `APP_URL` is the same origin you already use for passkeys and invite
 links — for example `https://health.example`. It must be reachable by the
@@ -40,11 +40,15 @@ LAN-only origin works for Claude Desktop over stdio).
 
 ## 1. Enable the module
 
-In the app: **Settings → MCP**. The card has three parts:
+The switch lives with every other module: **Settings → Modules**, the
+**MCP** row. Turn it on and the `/mcp` endpoint goes live for your account.
 
-- **Enable** — the opt-in switch. Toggle it on; the `/mcp` endpoint goes
-  live for your account and the card shows your endpoint URL
-  (`<origin>/mcp`).
+**Settings → MCP** is where you use it. The page has three parts:
+
+- **State** — whether the module is on, with a link to its switch in
+  Modules, and your endpoint URL (`<origin>/mcp`). Turning the module off
+  pauses the endpoint; your tokens and connections stay and work again
+  once it is back on.
 - **Connections** — cloud connectors that completed the OAuth flow appear
   here; revoke any of them.
 - **Tokens** — manual connector tokens (see below).