perf: 优化 Agent 流式会话处理

- 合并流式通知与持久化写入，限制浏览器会话缓存

- 增量投影轮次事件并稳定关联异步工具任务

easyflow-ui-admin/packages/effects/common-ui/src/components/chat-timeline/builder.ts

@@ -162,14 +162,26 @@ function finishAssistantMessage(
   }
 }
 
-function findToolItem(items: ChatTimelineItem[], toolCallId?: string) {
-  const identity = normalizeText(toolCallId).trim();
-  if (!identity) {
+function findToolItem(
+  items: ChatTimelineItem[],
+  toolCallId?: string,
+  taskId?: string,
+  sourceToolCallId?: string,
+) {
+  const identities = new Set(
+    [toolCallId, sourceToolCallId]
+      .map((value) => normalizeText(value).trim())
+      .filter(Boolean),
+  );
+  const normalizedTaskId = normalizeText(taskId).trim();
+  if (identities.size === 0 && !normalizedTaskId) {
     return undefined;
   }
   return items.find(
     (item): item is ChatTimelineToolItem =>
-      item.type === 'tool' && item.toolCallId === identity,
+      item.type === 'tool' &&
+      ((Boolean(normalizedTaskId) && item.taskId === normalizedTaskId) ||
+        (item.toolCallId ? identities.has(item.toolCallId) : false)),
   );
 }
 
@@ -251,7 +263,9 @@ function upsertTool(
     rejectReason?: string;
     requestId?: string;
     resumeToken?: string;
+    sourceToolCallId?: string;
     status?: ChatTimelineToolStatus;
+    taskId?: string;
     toolCallId?: string;
     toolName?: string;
   },
@@ -259,7 +273,13 @@ function upsertTool(
   const toolCallId = normalizeText(
     payload.toolCallId ?? payload.approval?.toolCallId,
   ).trim();
-  const found = findToolItem(items, toolCallId);
+  const taskId = normalizeText(payload.taskId).trim();
+  const found = findToolItem(
+    items,
+    toolCallId,
+    taskId,
+    payload.sourceToolCallId,
+  );
   const approval = payload.approval ?? found?.approval;
   const mode =
     payload.mode === 'approval'
@@ -287,6 +307,7 @@ function upsertTool(
     found.output = normalizePayloadValue(payload.output) ?? found.output;
     found.rejectReason = payload.rejectReason ?? found.rejectReason;
     found.status = payload.status || found.status;
+    found.taskId = taskId || found.taskId;
     found.toolCallId = toolCallId || found.toolCallId;
     found.toolName = toolName || found.toolName;
     return found;
@@ -304,6 +325,7 @@ function upsertTool(
     rejectReason: payload.rejectReason,
     status:
       payload.status || (mode === 'approval' ? 'pending_approval' : 'running'),
+    taskId: taskId || undefined,
     toolCallId,
     toolName: toolName || '工具调用',
     type: 'tool',
@@ -417,8 +439,10 @@ export const ChatTimelineBuilder = {
     payload: {
       input?: unknown;
       output?: unknown;
+      sourceToolCallId?: string;
       status?: ChatTimelineToolStatus;
       statusKey?: string;
+      taskId?: string;
       toolCallId?: string;
       toolName?: string;
     },