fix(agents): 修复 HIL 工具审批 interrupt 被误当 ask_user_question 处理

[xiangfei258]

说明

本 PR 是 #784 的干净重新提交。

#784 误夹带了与 HIL 修复无关的本地定制 commit(logo / 首页 / 登录页 / 配置等),已被关闭。本 PR 仅保留 HIL 工具审批相关的改动。

改动内容

后端

• 修复 HIL 工具审批 interrupt 在后端三处被误当 ask_user_question 处理(agent_run_service / chat_service / run_worker)
• 补充 test_agent_run_service / test_chat_stream_interrupt 单测

前端

• 新增 HumanToolApprovalModal.vue 工具审批弹窗,支持 approve / reject / edit
• 新增 approvalInterrupt.js,调整 useApproval.js / useAgentRunStream.js / AgentChatComponent.vue 接入审批弹窗

Supersedes #784

[gemini-code-assist]

Code Review

This pull request introduces support for LangChain's HumanInTheLoopMiddleware tool approval interrupts, resolving issues where they were incorrectly handled as standard user questions. Key changes include backend routing of HIL interrupts to a new human_approval_required status, payload compacting whitelist updates, and frontend support via a new HumanToolApprovalModal component allowing users to approve, reject, or edit tool arguments. Feedback on the PR highlights a potential issue in HumanToolApprovalModal.vue where editing string-based or empty tool arguments could cause JSON.parse to fail, and suggests a more robust parsing implementation.

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[gemini-code-assist]

当原始参数 args 是一个普通字符串（例如 "some_string"）或者为空（null/undefined）时，点击“编辑参数”后，formatArgs 会将其转换为 "some_string" 或 ""。在提交编辑时，parseEditedArgs 会直接调用 JSON.parse，这会导致解析失败（抛出 SyntaxError），使用户无法成功提交编辑。\n\n建议：在 parseEditedArgs 中，先对空输入进行处理（默认返回 {}），并判断原始参数是否为字符串类型。如果是字符串类型，则直接返回编辑后的文本，而不需要进行 JSON.parse。

const parseEditedArgs = () => {
  const trimmed = editText.value.trim()
  if (!trimmed) {
    editError.value = ''
    return {}
  }
  const originalArgs = props.actionRequests[0]?.args
  if (typeof originalArgs === 'string') {
    editError.value = ''
    return trimmed
  }
  try {
    const parsed = JSON.parse(trimmed)
    editError.value = ''
    return parsed
  } catch (e) {
    editError.value = '参数不是合法 JSON：' + e.message
    return null
  }
}