mcp: add chatbi ui (#2650)

Author: BohuTANG

docs/en/guides/51-ai-functions/02-mcp.md

@@ -13,6 +13,8 @@
 
 This tutorial shows you how to build a conversational Business Intelligence tool using mcp-databend and the Agno framework. You'll create a local agent that can answer data questions in natural language.
 
+![Databend MCP ChatBI](@site/static/img/connect/databend-mcp-chatbi.png)
+
 ## Step-by-Step Tutorial
 
 ### Step 1: Setup Databend Connection
@@ -49,6 +51,9 @@ Now create your ChatBI agent that uses mcp-databend to interact with your databa
 
 Create a file `agent.py`:
 
+<details>
+<summary>Click to view agent.py code</summary>
+
 ```python
 from contextlib import asynccontextmanager
 import os
@@ -162,6 +167,8 @@ if __name__ == "__main__":
     playground.serve(app="agent:app", host="127.0.0.1", port=7777)
 ```
 
+</details>
+
 ### Step 4: Configure Environment
 
 Set up your API keys and database connection: