fix(issue #1265): [Bug]: 意图识别模块，构造messages时，里面只有 system_prompt，没有 user_prompt，这会导致llm接口兼容问

[openjiuwen-sync-bot]

Paired: GitHub #172 ↔ GitCode !1761

Fixes #​1265

机器人基于 issue 分析自动修复。

根因

Bug 根因分析：

意图识别模块在构造 LLM 请求的 messages 数组时，仅包含 system_prompt 角色的消息，未添加 user_prompt 角色的消息。这导致部分 LLM API（如 GLM 系列）因缺少 user 角色消息而报错，而 DeepSeek 等宽松实现的 API 可以正常处理。

受影响的代码路径：

• agent-runtime/jiuwen/common/intent_detection/adapt/intent.py — Intent 类（第134行），通过 build 方法实例化，负责意图识别的 LLM 调用
• agent_builder/nl_to_agent/ 下多个子模块（clarifier/prompt.py、designer/prompt.py、generate_json_workflow/prompt.py、agent_designer/prompt.py）均定义了 SYSTEM_PROMPT 常量，调用链中仅引用 system prompt，未见构造 user prompt

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由 issues-robot auto-fix 生成，复核后可合并。

Linked Closing Issues:

• Fixes [Bug]: 意图识别模块，构造messages时，里面只有 system_prompt，没有 user_prompt，这会导致llm接口兼容问题，我测试时 glm系列接口会报错，但是 deepseek 可以正常处理。 #168

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