[Bug]: AGUIChatWorkflow.aggregate_tool_calls only appends ToolMessages for backend tools, orphaning frontend tool_call_ids
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使用 AGUIChatWorkflow ( llama-index-protocols-ag-ui )时触发。典型场景:Agent 在同一轮中同时调用了后端工具(如计算函数)和前端工具(如 UI 渲染)。用户可能使用 MockFunctionCallingLLM 进行测试,或在实际 AG-UI 流程
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