[Bug]: demo Data Agent missing /api/user/bindings

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**Describe the bug**

demo DataAgent not found binding page /api/user/bindings

**To Reproduce**
Steps to reproduce the behavior:
1. open link http://127.0.0.1:8080/bindings
1. You code
2. How to execute
3. See error

**Expected behavior**
页面正常显示，可以绑定channel

**Error messages**
{"timestamp":"2026-08-14T11:37:24.879Z","path":"/api/user/bindings","status":404,"error":"Not Found","requestId":"40264c06-21"}

**Environment (please complete the following information):**

- AgentScope-Java Version: [e.g. 1.0.12, check your pom.xml dependency version or run `mvn dependency:tree | grep agentscope-parent:pom`(only mac/linux)]
- Java Version: [17]
- OS: [macos]

**Additional context**
Add any other context about the problem here.