fix: dedupe task timeline milestones

app-instance/frontend/lib/task-timeline.test.ts

@@ -221,4 +221,52 @@ describe('buildTaskTimelineCards', () => {
 
     expect(cards.map((card) => card.id)).toEqual(['task-1:created', 'evt-invalid-date']);
   });
+
+  it('dedupes synthetic result and acceptance milestones when lifecycle events exist', () => {
+    const task = makeTask({
+      is_open: false,
+      status: 'closed',
+      updated_at: '2026-05-26T10:04:00.000Z',
+      closed_at: '2026-05-26T10:04:00.000Z',
+      feedback: [
+        {
+          acceptance_type: 'accept',
+          comment: '可以',
+          created_at: '2026-05-26T10:05:00.000Z',
+          run_id: 'run-main',
+        },
+      ],
+    });
+    const processEvents: ProcessEvent[] = [
+      {
+        event_id: 'evt-result-ready',
+        run_id: 'run-main',
+        parent_run_id: null,
+        kind: 'task_result_ready',
+        actor_type: 'agent',
+        actor_id: 'main-agent',
+        actor_name: 'Main Agent',
+        text: 'Result is ready.',
+        created_at: '2026-05-26T10:04:00.000Z',
+      },
+      {
+        event_id: 'evt-acceptance-recorded',
+        run_id: 'run-main',
+        parent_run_id: null,
+        kind: 'task_acceptance_recorded',
+        actor_type: 'system',
+        actor_id: 'task-system',
+        actor_name: 'Task System',
+        text: '可以',
+        created_at: '2026-05-26T10:05:00.000Z',
+      },
+    ];
+
+    const cards = buildTaskTimelineCards({ task, processEvents });
+
+    expect(cards.filter((card) => card.type === 'result')).toHaveLength(1);
+    expect(cards.filter((card) => card.type === 'acceptance')).toHaveLength(1);
+    expect(cards.map((card) => card.id)).toContain('evt-result-ready');
+    expect(cards.map((card) => card.id)).toContain('evt-acceptance-recorded');
+  });
 });

app-instance/frontend/lib/task-timeline.ts

@@ -209,6 +209,10 @@ function compareCardsByCreatedAt(
   return aTime - bTime || a.index - b.index;
 }
 
+function acceptanceKey(runId: string | null | undefined, createdAt: string): string {
+  return `${runId ?? ''}:${createdAt}`;
+}
+
 export function buildTaskTimelineCards(input: BuildTaskTimelineCardsInput): TaskTimelineCard[] {
   const { task } = input;
   const processRuns = input.processRuns ?? task.process_runs ?? [];
@@ -216,6 +220,8 @@ export function buildTaskTimelineCards(input: BuildTaskTimelineCardsInput): Task
   const processArtifacts = input.processArtifacts ?? task.process_artifacts ?? [];
   const runsById = buildRunMap(processRuns);
   const runsWithProgressEvents = new Set<string>();
+  const acceptanceEventKeys = new Set<string>();
+  let hasResultEventCard = false;
   const cards: TaskTimelineCard[] = [
     {
       id: `${task.task_id}:created`,
@@ -236,6 +242,12 @@ export function buildTaskTimelineCards(input: BuildTaskTimelineCardsInput): Task
     if (type === 'agent_progress') {
       runsWithProgressEvents.add(event.run_id);
     }
+    if (type === 'result') {
+      hasResultEventCard = true;
+    }
+    if (type === 'acceptance') {
+      acceptanceEventKeys.add(acceptanceKey(event.run_id, event.created_at));
+    }
 
     cards.push({
       id: event.event_id,
@@ -292,7 +304,7 @@ export function buildTaskTimelineCards(input: BuildTaskTimelineCardsInput): Task
     });
   }
 
-  if (RESULT_STATUSES.has(task.status)) {
+  if (RESULT_STATUSES.has(task.status) && !hasResultEventCard) {
     cards.push({
       id: `${task.task_id}:result`,
       taskId: task.task_id,
@@ -308,15 +320,19 @@ export function buildTaskTimelineCards(input: BuildTaskTimelineCardsInput): Task
 
   for (let index = 0; index < task.feedback.length; index += 1) {
     const feedback = task.feedback[index];
+    const runId = firstString(feedback.run_id) ?? null;
+    const createdAt = feedbackCreatedAt(feedback, task);
+    if (acceptanceEventKeys.has(acceptanceKey(runId, createdAt))) continue;
+
     cards.push({
       id: `${task.task_id}:acceptance:${index}`,
       taskId: task.task_id,
-      runId: firstString(feedback.run_id) ?? null,
+      runId,
       type: 'acceptance',
       title: titleForCard('acceptance'),
       summary: feedbackSummary(feedback),
       status: firstString(feedback.acceptance_type),
-      createdAt: feedbackCreatedAt(feedback, task),
+      createdAt,
       details: feedback,
     });
   }