diff --git a/backend/package/yuxi/services/agent_run_service.py b/backend/package/yuxi/services/agent_run_service.py
index 169588db..9ed14bf7 100644
--- a/backend/package/yuxi/services/agent_run_service.py
+++ b/backend/package/yuxi/services/agent_run_service.py
@@ -17,6 +17,7 @@ from yuxi.repositories.agent_repository import AgentRepository
 from yuxi.repositories.agent_run_repository import TERMINAL_RUN_STATUSES, AgentRunRepository
 from yuxi.repositories.conversation_repository import ConversationRepository
 from yuxi.services.run_queue_service import (
+    build_run_event_envelope,
     get_arq_pool,
     get_last_run_stream_seq,
     list_run_stream_events,
@@ -273,14 +274,13 @@ async def stream_agent_run_events(
                 if terminal_seq in {"", "0-0"}:
                     terminal_seq = None
                 yield _format_sse(
-                    {
-                        "schema_version": 1,
-                        "run_id": run_id,
-                        "thread_id": run.thread_id,
-                        "event": "end",
-                        "payload": {"status": run.status},
-                        "created_at": utc_now_naive().isoformat(),
-                    },
+                    build_run_event_envelope(
+                        run_id=run_id,
+                        thread_id=run.thread_id,
+                        event_type="end",
+                        payload={"status": run.status},
+                        created_at=utc_now_naive().isoformat(),
+                    ),
                     event="end",
                     event_id=terminal_seq,
                 )
diff --git a/backend/package/yuxi/services/run_queue_service.py b/backend/package/yuxi/services/run_queue_service.py
index e6c13d35..df93fe32 100644
--- a/backend/package/yuxi/services/run_queue_service.py
+++ b/backend/package/yuxi/services/run_queue_service.py
@@ -55,6 +55,32 @@ def normalize_after_seq(after_seq: str | None) -> str:
     return "0-0"
 
 
+def build_run_event_envelope(
+    *,
+    run_id: str,
+    event_type: str,
+    payload: dict | None = None,
+    thread_id: str | None = None,
+    created_at: str | None = None,
+) -> dict:
+    return {
+        "schema_version": 1,
+        "run_id": run_id,
+        "thread_id": thread_id,
+        "event": event_type,
+        "payload": payload or {},
+        "created_at": created_at or datetime.now(tz=UTC).isoformat(),
+    }
+
+
+def _payload_thread_id(payload: dict | None) -> str | None:
+    chunk = payload.get("chunk") if isinstance(payload, dict) else None
+    if not isinstance(chunk, dict):
+        return None
+    thread_id = chunk.get("thread_id")
+    return thread_id.strip() if isinstance(thread_id, str) and thread_id.strip() else None
+
+
 async def get_redis_client():
     global _redis_client
     if _redis_client is not None:
@@ -164,14 +190,14 @@ async def append_run_stream_event(run_id: str, event_type: str, payload: dict, *
     key = _event_stream_key(run_id)
     now = datetime.now(tz=UTC)
     now_ms = int(now.timestamp() * 1000)
-    envelope = {
-        "schema_version": 1,
-        "run_id": run_id,
-        "thread_id": thread_id,
-        "event": event_type,
-        "payload": payload or {},
-        "created_at": now.isoformat(),
-    }
+    event_thread_id = thread_id or _payload_thread_id(payload)
+    envelope = build_run_event_envelope(
+        run_id=run_id,
+        event_type=event_type,
+        payload=payload or {},
+        thread_id=event_thread_id,
+        created_at=now.isoformat(),
+    )
     fields = {
         "event_type": event_type,
         "payload": json.dumps(envelope, ensure_ascii=False),
diff --git a/backend/test/unit/services/test_run_queue_service.py b/backend/test/unit/services/test_run_queue_service.py
index ecccc417..1366fdee 100644
--- a/backend/test/unit/services/test_run_queue_service.py
+++ b/backend/test/unit/services/test_run_queue_service.py
@@ -97,7 +97,11 @@ async def test_run_stream_event_roundtrip(monkeypatch: pytest.MonkeyPatch):
 
     run_id = "run-1"
     seq1 = await run_queue_service.append_run_stream_event(run_id, "loading", {"items": [1]})
-    seq2 = await run_queue_service.append_run_stream_event(run_id, "finished", {"chunk": {"status": "finished"}})
+    seq2 = await run_queue_service.append_run_stream_event(
+        run_id,
+        "finished",
+        {"chunk": {"status": "finished", "thread_id": "child-thread"}},
+    )
 
     assert seq1 < seq2
 
@@ -106,6 +110,7 @@ async def test_run_stream_event_roundtrip(monkeypatch: pytest.MonkeyPatch):
     assert events[0]["payload"]["schema_version"] == 1
     assert events[0]["payload"]["run_id"] == run_id
     assert events[0]["payload"]["payload"] == {"items": [1]}
+    assert events[1]["payload"]["thread_id"] == "child-thread"
 
     next_events = await run_queue_service.list_run_stream_events(run_id, after_seq=seq1, limit=100)
     assert len(next_events) == 1
diff --git a/docs/develop-guides/roadmap.md b/docs/develop-guides/roadmap.md
index ea615c0e..4230f5fc 100644
--- a/docs/develop-guides/roadmap.md
+++ b/docs/develop-guides/roadmap.md
@@ -67,7 +67,7 @@
 - 收敛用户身份命名：原业务登录标识统一改为 `uid`，Agent/LangGraph runtime、conversation、agent_run、sandbox 路径和前端用户态均使用字符串 `uid`；`user_id` 仅保留给外部响应中的数值 `users.id` 或真实外键场景。
 - 工作区知识库分类显示：知识库侧边栏按创建者分组为“我的知识库”和“共享知识库”，自己创建的知识库显示在“我的知识库”下，非自己创建的显示在“共享知识库”下；`knowledge_bases` 表新增 `created_by` 字段记录创建者 uid。
 - 聊天附件新增 MinIO tmp 临时上传、可选 PDF/图片解析、确认后加入线程附件的流程；前端改为弹窗内上传、解析与确认。
-- 标准化 Agent run/SSE 执行链路：run 创建时持久化输入消息并提交后入队，worker 统一写入 Redis Stream envelope，SSE 输出 `event/data/id`、心跳注释、`Last-Event-ID` 回放和终止 `end` 事件；前端强制使用 run API 并支持 ask_user_question 中断后以 resume run 恢复。
+- 标准化 Agent run/SSE 执行链路：run 创建时持久化输入消息并提交后入队，worker 统一写入 Redis Stream envelope，SSE 输出 `event/data/id`、心跳注释、`Last-Event-ID` 回放和终止 `end` 事件；前端强制使用 run API 并支持 ask_user_question 中断后以 resume run 恢复；事件 envelope 构造收敛到统一 helper，前端优先使用 envelope 一级 `thread_id` 路由。
 - 收敛后端模块边界：文档解析从 `plugins.parser` 移动到 `knowledge.parser`，内容审查从 `plugins.guard` 移动到 `services.guard`。
 - 收敛文件服务边界：文件预览判断抽为独立服务，Viewer 文件系统的 workspace 分支复用用户 workspace 服务，线程运行时上下文解析从泛化 `filesystem_service` 拆出为 agent runtime helper。
 - 升级 DeepAgents 到 0.6.7 并适配新版文件系统协议：SubAgentMiddleware 改为显式 subagent spec，Skills prompt 补齐新版占位符；sandbox/skills backend 复用新版 `ReadResult`、`GlobResult`、`GrepResult` 等协议类型，文件权限在 backend 层明确区分 skills、uploads、outputs 与 workspace，保留最小 `CustomCompositeBackend` 以避免非 route glob 误扫其他 route；Agent 上下文压缩改为复用 DeepAgents SummarizationMiddleware，历史摘要与大工具结果统一 offload 到 outputs。
diff --git a/web/src/components/AgentChatComponent.vue b/web/src/components/AgentChatComponent.vue
index 92cce254..6482d4d7 100644
--- a/web/src/components/AgentChatComponent.vue
+++ b/web/src/components/AgentChatComponent.vue
@@ -45,10 +45,7 @@
           <div class="chat-box">
             <template v-for="row in conversationRows" :key="row.key">
               <div v-if="row.type === 'conversation'" class="conv-box">
-                <template
-                  v-for="(displayItem, itemIndex) in getConversationDisplayItems(row.conv)"
-                  :key="displayItem.key"
-                >
+                <template v-for="(displayItem, itemIndex) in row.displayItems" :key="displayItem.key">
                   <AgentMessageComponent
                     v-if="displayItem.type === 'message'"
                     :message="displayItem.message"
@@ -62,9 +59,7 @@
                   <ToolCallsGroupComponent
                     v-else
                     :tool-calls="displayItem.toolCalls"
-                    :is-active="
-                      isToolGroupActive(row.conv, itemIndex, getConversationDisplayItems(row.conv))
-                    "
+                    :is-active="isToolGroupActive(row.conv, itemIndex, row.displayItems)"
                   />
                 </template>
                 <AgentArtifactsCard
@@ -366,6 +361,7 @@ import { useAgentMentionConfig } from '@/composables/useAgentMentionConfig'
 import AgentArtifactsCard from '@/components/AgentArtifactsCard.vue'
 import AgentPanel from '@/components/AgentPanel.vue'
 import AttachmentTmpUploadModal from '@/components/AttachmentTmpUploadModal.vue'
+import { normalizeToolCalls } from '@/components/ToolCallingResult/toolRegistry'
 
 // ==================== PROPS & EMITS ====================
 const props = defineProps({
@@ -821,7 +817,8 @@ const conversationRows = computed(() => {
   const rows = conversations.value.map((conv, index) => ({
     type: 'conversation',
     key: conv.status === 'streaming' ? 'ongoing-conversation' : `history-${index}`,
-    conv
+    conv,
+    displayItems: getConversationDisplayItems(conv)
   }))
 
   if (currentThreadConfigNotice.value) {
@@ -1769,27 +1766,10 @@ const handleResizingChange = (isResizingState, clientX = 0) => {
 }
 
 // ==================== HELPER FUNCTIONS ====================
-const extractAssistantMessageBody = (message) => {
-  let content = typeof message?.content === 'string' ? message.content.trim() : ''
-  let reasoningContent = message?.additional_kwargs?.reasoning_content || ''
-
-  if (!reasoningContent && content) {
-    const thinkRegex = /<think>(.*?)<\/think>|<think>(.*?)$/s
-    const thinkMatch = content.match(thinkRegex)
-
-    if (thinkMatch) {
-      reasoningContent = (thinkMatch[1] || thinkMatch[2] || '').trim()
-      content = content.replace(thinkMatch[0], '').trim()
-    }
-  }
-
-  return { content, reasoningContent }
-}
-
 const hasVisibleAssistantBody = (message) => {
   if (!message || message.type !== 'ai') return true
 
-  const { content, reasoningContent } = extractAssistantMessageBody(message)
+  const { content, reasoningContent } = MessageProcessor.parseAssistantMessageBody(message)
   return Boolean(
     content ||
     reasoningContent ||
@@ -1800,19 +1780,8 @@ const hasVisibleAssistantBody = (message) => {
 }
 
 const getMessageToolCalls = (message) => {
-  if (!Array.isArray(message?.tool_calls)) return []
-
-  return message.tool_calls
-    .filter((toolCall) => {
-      return (
-        toolCall &&
-        (toolCall.id || toolCall.name || toolCall.function?.name) &&
-        (toolCall.args !== undefined ||
-          toolCall.function?.arguments !== undefined ||
-          toolCall.tool_call_result !== undefined)
-      )
-    })
-    .map((toolCall) => {
+  return normalizeToolCalls(message?.tool_calls, {
+    mapToolCall: (toolCall) => {
       const subagentRun = toolCall.id ? currentSubagentRunById.value.get(String(toolCall.id)) : null
       if (!subagentRun) return toolCall
 
@@ -1821,7 +1790,8 @@ const getMessageToolCalls = (message) => {
         subagent_run: subagentRun,
         display_label: subagentRun.subagent_name || subagentRun.subagent_type || undefined
       }
-    })
+    }
+  })
 }
 
 // 将 AI 消息拆成“正文块”和“工具块”，再跨消息合并相邻工具块。
diff --git a/web/src/components/AgentMessageComponent.vue b/web/src/components/AgentMessageComponent.vue
index 62b54870..4b7bc2fb 100644
--- a/web/src/components/AgentMessageComponent.vue
+++ b/web/src/components/AgentMessageComponent.vue
@@ -148,6 +148,7 @@ import { storeToRefs } from 'pinia'
 import { MessageProcessor } from '@/utils/messageProcessor'
 import { normalizeAttachmentPreviews } from '@/utils/file_utils'
 import { buildMentionDisplayLabels } from '@/utils/mention_utils'
+import { normalizeToolCalls } from '@/components/ToolCallingResult/toolRegistry'
 
 const props = defineProps({
   // 消息角色：'user'|'assistant'|'sent'|'received'
@@ -281,50 +282,13 @@ const messageSources = computed(() => {
   return { knowledgeChunks: [], webSources: [] }
 })
 
-// 过滤有效的工具调用
-const validToolCalls = computed(() => {
-  if (!props.message.tool_calls || !Array.isArray(props.message.tool_calls)) {
-    return []
-  }
-
-  return props.message.tool_calls.filter((toolCall) => {
-    // 过滤掉无效的工具调用
-    return (
-      toolCall &&
-      (toolCall.id || toolCall.name || toolCall.function?.name) &&
-      (toolCall.args !== undefined ||
-        toolCall.function?.arguments !== undefined ||
-        toolCall.tool_call_result !== undefined)
-    )
-  })
-})
+const validToolCalls = computed(() => normalizeToolCalls(props.message.tool_calls))
 
 const parsedData = computed(() => {
-  // Start with default values from the prop to avoid mutation.
-  let content = props.message.content.trim() || ''
-  let reasoning_content = props.message.additional_kwargs?.reasoning_content || ''
-
-  if (reasoning_content) {
-    return {
-      content,
-      reasoning_content
-    }
-  }
-
-  // Regex to find <think>...</think> or an unclosed <think>... at the end of the string.
-  const thinkRegex = /<think>(.*?)<\/think>|<think>(.*?)$/s
-  const thinkMatch = content.match(thinkRegex)
-
-  if (thinkMatch) {
-    // The captured reasoning is in either group 1 (closed tag) or 2 (unclosed tag).
-    reasoning_content = (thinkMatch[1] || thinkMatch[2] || '').trim()
-    // Remove the entire matched <think> block from the original content.
-    content = content.replace(thinkMatch[0], '').trim()
-  }
-
+  const { content, reasoningContent } = MessageProcessor.parseAssistantMessageBody(props.message)
   return {
     content,
-    reasoning_content
+    reasoning_content: reasoningContent
   }
 })
 </script>
diff --git a/web/src/components/ToolCallingResult/ToolCallRenderer.vue b/web/src/components/ToolCallingResult/ToolCallRenderer.vue
index e5a5863e..0a11473b 100644
--- a/web/src/components/ToolCallingResult/ToolCallRenderer.vue
+++ b/web/src/components/ToolCallingResult/ToolCallRenderer.vue
@@ -41,7 +41,7 @@ import MysqlDescribeTableTool from './tools/MysqlDescribeTableTool.vue'
 import MysqlListTablesTool from './tools/MysqlListTablesTool.vue'
 import AskUserQuestionTool from './tools/AskUserQuestionTool.vue'
 import ExecuteTool from './tools/ExecuteTool.vue'
-import { getToolCallId, HIDDEN_TOOL_CALL_IDS } from './toolRegistry'
+import { getToolCallId, isHiddenToolCall } from './toolRegistry'
 
 const props = defineProps({
   toolCall: {
@@ -91,7 +91,7 @@ const TOOL_RENDERERS = {
 }
 
 const currentRenderer = computed(() => TOOL_RENDERERS[toolId.value] || null)
-const isHidden = computed(() => HIDDEN_TOOL_CALL_IDS.includes(toolId.value))
+const isHidden = computed(() => isHiddenToolCall(props.toolCall))
 
 const toolRendererRef = ref(null)
 const refreshGraph = () => {
diff --git a/web/src/components/ToolCallingResult/toolRegistry.js b/web/src/components/ToolCallingResult/toolRegistry.js
index b1014e03..14325e1f 100644
--- a/web/src/components/ToolCallingResult/toolRegistry.js
+++ b/web/src/components/ToolCallingResult/toolRegistry.js
@@ -53,4 +53,27 @@ export const HIDDEN_TOOL_CALL_IDS = ['present_artifacts']
 
 export const getToolCallId = (toolCall) => toolCall?.name || toolCall?.function?.name || ''
 
+export const isHiddenToolCall = (toolCall) => HIDDEN_TOOL_CALL_IDS.includes(getToolCallId(toolCall))
+
+export const isValidToolCall = (toolCall) => {
+  return Boolean(
+    toolCall &&
+      (toolCall.id || toolCall.name || toolCall.function?.name) &&
+      (toolCall.args !== undefined ||
+        toolCall.function?.arguments !== undefined ||
+        toolCall.tool_call_result !== undefined)
+  )
+}
+
+export const normalizeToolCalls = (toolCalls, { includeHidden = false, mapToolCall } = {}) => {
+  if (!Array.isArray(toolCalls)) return []
+
+  return toolCalls
+    .filter((toolCall) => {
+      if (!isValidToolCall(toolCall)) return false
+      return includeHidden || !isHiddenToolCall(toolCall)
+    })
+    .map((toolCall) => (mapToolCall ? mapToolCall(toolCall) : toolCall))
+}
+
 export const getToolIcon = (toolId) => TOOL_ICON_MAP[toolId] || null
diff --git a/web/src/components/ToolCallsGroupComponent.vue b/web/src/components/ToolCallsGroupComponent.vue
index b4289bb0..7fe5e863 100644
--- a/web/src/components/ToolCallsGroupComponent.vue
+++ b/web/src/components/ToolCallsGroupComponent.vue
@@ -42,7 +42,7 @@
 import { computed, ref, watch } from 'vue'
 import { ChevronDown, ChevronRight, Wrench } from 'lucide-vue-next'
 import { ToolCallRenderer } from '@/components/ToolCallingResult'
-import { getToolCallId, HIDDEN_TOOL_CALL_IDS } from '@/components/ToolCallingResult/toolRegistry'
+import { getToolCallId, normalizeToolCalls } from '@/components/ToolCallingResult/toolRegistry'
 
 const props = defineProps({
   toolCalls: {
@@ -55,20 +55,7 @@ const props = defineProps({
   }
 })
 
-const normalizedToolCalls = computed(() => {
-  return (props.toolCalls || []).filter((toolCall) => {
-    const toolId = getToolCallId(toolCall)
-
-    return (
-      toolCall &&
-      !HIDDEN_TOOL_CALL_IDS.includes(toolId) &&
-      (toolCall.id || toolCall.name || toolCall.function?.name) &&
-      (toolCall.args !== undefined ||
-        toolCall.function?.arguments !== undefined ||
-        toolCall.tool_call_result !== undefined)
-    )
-  })
-})
+const normalizedToolCalls = computed(() => normalizeToolCalls(props.toolCalls))
 
 const shouldCollapseToolCalls = computed(() => normalizedToolCalls.value.length > 0)
 const areToolCallsExpanded = ref(false)
diff --git a/web/src/composables/useAgentRunStream.js b/web/src/composables/useAgentRunStream.js
index 93d952d5..62291e4d 100644
--- a/web/src/composables/useAgentRunStream.js
+++ b/web/src/composables/useAgentRunStream.js
@@ -55,9 +55,9 @@ const getThreadIdFromObject = (value) => {
 
 const resolveChunkThreadId = ({ envelope, payload, chunk, fallbackThreadId }) => {
   return (
-    getThreadIdFromObject(chunk) ||
-    getThreadIdFromObject(payload) ||
     getThreadIdFromObject(envelope) ||
+    getThreadIdFromObject(payload) ||
+    getThreadIdFromObject(chunk) ||
     fallbackThreadId
   )
 }
diff --git a/web/src/utils/__tests__/messageProcessor.spec.js b/web/src/utils/__tests__/messageProcessor.spec.js
index f573ccff..e29850df 100644
--- a/web/src/utils/__tests__/messageProcessor.spec.js
+++ b/web/src/utils/__tests__/messageProcessor.spec.js
@@ -109,6 +109,12 @@ const run = () => {
   assert.equal(conversations[0].messages.at(-1).isLast, true)
   assert.equal(conversations[0].status, 'finished')
 
+  const assistantBody = MessageProcessor.parseAssistantMessageBody({
+    type: 'ai',
+    content: '<think>推理过程</think>最终答案'
+  })
+  assert.deepEqual(assistantBody, { content: '最终答案', reasoningContent: '推理过程' })
+
   console.log('messageProcessor extractKnowledgeChunksFromConversation: all assertions passed')
 }
 
diff --git a/web/src/utils/messageProcessor.js b/web/src/utils/messageProcessor.js
index 3f51f5d4..df9e9ebf 100644
--- a/web/src/utils/messageProcessor.js
+++ b/web/src/utils/messageProcessor.js
@@ -283,6 +283,28 @@ export class MessageProcessor {
     }
   }
 
+  /**
+   * 解析助手消息正文与推理内容，保持渲染和列表拆分使用同一套规则。
+   * @param {Object} message - AI 消息对象
+   * @returns {{content: string, reasoningContent: string}}
+   */
+  static parseAssistantMessageBody(message) {
+    let content = typeof message?.content === 'string' ? message.content.trim() : ''
+    let reasoningContent = message?.additional_kwargs?.reasoning_content || ''
+
+    if (!reasoningContent && content) {
+      const thinkRegex = /<think>(.*?)<\/think>|<think>(.*?)$/s
+      const thinkMatch = content.match(thinkRegex)
+
+      if (thinkMatch) {
+        reasoningContent = (thinkMatch[1] || thinkMatch[2] || '').trim()
+        content = content.replace(thinkMatch[0], '').trim()
+      }
+    }
+
+    return { content, reasoningContent }
+  }
+
   /**
    * 合并消息块
    * @param {Array} chunks - 消息块数组
@@ -398,96 +420,6 @@ export class MessageProcessor {
     }
   }
 
-  /**
-   * 处理流式响应数据块
-   * @param {Object} data - 响应数据
-   * @param {Object} onGoingConv - 进行中的对话对象
-   * @param {Object} state - 状态对象
-   * @param {Function} getAgentHistory - 获取历史记录函数
-   * @param {Function} handleError - 错误处理函数
-   */
-  static async processResponseChunk(data, onGoingConv, state, getAgentHistory, handleError) {
-    try {
-      switch (data.status) {
-        case 'init':
-          // 代表服务端收到请求并返回第一个响应
-          state.waitingServerResponse = false
-          onGoingConv.msgChunks[data.request_id] = [data.msg]
-          break
-
-        case 'loading':
-          if (data.msg.id) {
-            if (!onGoingConv.msgChunks[data.msg.id]) {
-              onGoingConv.msgChunks[data.msg.id] = []
-            }
-            onGoingConv.msgChunks[data.msg.id].push(data.msg)
-          }
-          break
-
-        case 'error':
-          console.error('流式处理出错:', data.message)
-          handleError(new Error(data.message), 'stream')
-          break
-
-        case 'finished':
-          await getAgentHistory()
-          break
-
-        default:
-          console.warn('未知的响应状态:', data.status)
-      }
-    } catch (error) {
-      handleError(error, 'stream')
-    }
-  }
-
-  /**
-   * 处理流式响应
-   * @param {Response} response - 响应对象
-   * @param {Function} processChunk - 处理块的函数
-   * @param {Function} scrollToBottom - 滚动到底部函数
-   * @param {Function} handleError - 错误处理函数
-   */
-  static async handleStreamResponse(response, processChunk, scrollToBottom, handleError) {
-    try {
-      const reader = response.body.getReader()
-      let buffer = ''
-      const decoder = new TextDecoder()
-
-      while (true) {
-        const { done, value } = await reader.read()
-        if (done) break
-
-        buffer += decoder.decode(value, { stream: true })
-        const lines = buffer.split('\n')
-        buffer = lines.pop() || '' // 保留最后一行可能不完整的内容
-
-        for (const line of lines) {
-          if (line.trim()) {
-            try {
-              const data = JSON.parse(line.trim())
-              await processChunk(data)
-            } catch (e) {
-              console.debug('解析JSON出错:', e.message)
-            }
-          }
-        }
-        await scrollToBottom()
-      }
-
-      // 处理缓冲区中可能剩余的内容
-      if (buffer.trim()) {
-        try {
-          const data = JSON.parse(buffer.trim())
-          await processChunk(data)
-        } catch {
-          console.warn('最终缓冲区内容无法解析:', buffer)
-        }
-      }
-    } catch (error) {
-      handleError(error, 'stream')
-    }
-  }
 }
 
 export default MessageProcessor