docs: Update docs for dashboard root and API stats

design.md

@@ -16,8 +16,9 @@ The daemon uses the `axum` and `rust-mcp-axum` crates, binding to `0.0.0.0:3000`
 *   `POST /messages`: The JSON-RPC endpoint. Clients use this to send tool calls and resource reads up to the server.
 
 ### Custom Integration Endpoints
+*   `GET /`: The Brain Monitor live HTML dashboard (returns real-time metrics UI).
+*   `GET /api/stats`: Returns a JSON snapshot of current entity, relation, task, and tech debt counts.
 *   `GET /gate/verify`: A lightweight, deterministic endpoint used by external scripts to verify if an action (like a `git push`) is authorized based on the current state.
-*   *(Future)* `GET /health` or `GET /graph` for immediate system inspection.
 
 ## 3. Client Connections
 The Antigravity configurations (`mcp_config.json`) utilize the dual-transport system: