[Bug]:AGUI扩展丢失TOOL_CALL_START事件

[gengxin]

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Describe the bug
调用AGUI扩展透出的/agui/run接口时，返回的message type没有TOOL_CALL_START类型，但有TOOL_CALL_END类型

To Reproduce
Steps to reproduce the behavior:

1. agentscope1.0.5, qwen3-max模型，构建带有toolkit的ReAct模型，示例代码如下：

public Agent buildAgent() {
return ReActAgent.builder()
            .name(name)
            .sysPrompt(sysPrompt)
            .model(model)
            .toolkit(toolkit)
            .maxIters(maxIters)
            .build();
}

2. 注册Agui factory

registry.registerFactory("default", TestAgent::buildAgent);

3. 前端使用@agui/client sdk调用agui接口 /agui/run，有报错信息

Agent execution failed: AGUIError: Cannot send 'TOOL_CALL_END' event: No active tool call found with ID 'call_822b9df76f71423f97e00897'. A 'TOOL_CALL_START' event must be sent first.

4. Expected behavior
   A clear and concise description of what you expected to happen.
   前端收到完整的TOOL_CALL_START、TOOL_CALL_ARGS、TOOL_CALL_END事件

Error messages
Detailed error messages.

Environment (please complete the following information):

• AgentScope-Java Version: [1.0.5]
• Java Version: [17]
• OS: [macos]

Additional context
Add any other context about the problem here.

[mengnankkkk]

I want to try it❤