修复确认生成后的任务列表对账

问题：客户端确认 Quote 后只刷新一次任务，遇到短暂投影延迟时任务列表为空且流程静默成功。

修复：按 quoteId 有界重试任务列表，合并 REST 与实时推送快照，缺任务时显示明确错误；补充 Store 与页面回归测试。

tests/unit/image-canvas-page.test.tsx

@@ -405,6 +405,7 @@ describe('ImageCanvas Workspace-first design experience', () => {
       .mockResolvedValueOnce([{
         ...taskFixture,
         taskId: 'task-two',
+        quoteId: 'quote-one',
         status: 'queued',
         resultAssets: [],
       }]);
@@ -421,6 +422,7 @@ describe('ImageCanvas Workspace-first design experience', () => {
         expect.stringMatching(/^turn-/),
       ));
     await waitFor(() => expect(fetchImageWorkspaceTasksMock).toHaveBeenCalledTimes(2));
+    expect(await screen.findByTestId('design-task-task-two')).toBeInTheDocument();
   });
 
   it('renders a new task pushed by the design event stream without repeated polling', async () => {

tests/unit/image-workspace-store.test.ts

@@ -14,6 +14,7 @@ const fetchImageWorkspaceProjectMock = vi.hoisted(() => vi.fn());
 const fetchImageWorkspaceTasksMock = vi.hoisted(() => vi.fn());
 const openImageWorkspaceTaskEventsMock = vi.hoisted(() => vi.fn());
 const sendImageWorkspaceMessageMock = vi.hoisted(() => vi.fn());
+const confirmImageWorkspaceGenerationMock = vi.hoisted(() => vi.fn());
 
 vi.mock('@/lib/image-workspace', async (importOriginal) => {
   const actual = await importOriginal<typeof import('@/lib/image-workspace')>();
@@ -24,6 +25,9 @@ vi.mock('@/lib/image-workspace', async (importOriginal) => {
     fetchImageWorkspaceTasks: (...args: unknown[]) => fetchImageWorkspaceTasksMock(...args),
     openImageWorkspaceTaskEvents: (...args: unknown[]) => openImageWorkspaceTaskEventsMock(...args),
     sendImageWorkspaceMessage: (...args: unknown[]) => sendImageWorkspaceMessageMock(...args),
+    confirmImageWorkspaceGeneration: (...args: unknown[]) => (
+      confirmImageWorkspaceGenerationMock(...args)
+    ),
   };
 });
 
@@ -144,6 +148,10 @@ describe('AI design task event store', () => {
     fetchImageWorkspaceProjectMock.mockResolvedValue(workspace());
     fetchImageWorkspaceTasksMock.mockResolvedValue([task]);
     sendImageWorkspaceMessageMock.mockResolvedValue(workspace());
+    confirmImageWorkspaceGenerationMock.mockResolvedValue({
+      ...workspace('workspace-one', 2),
+      turnRevision: 2,
+    });
   });
 
   afterEach(() => {
@@ -236,6 +244,46 @@ describe('AI design task event store', () => {
     await sending;
   });
 
+  it('reconciles the confirmed Quote until its generation task is visible', async () => {
+    const source = new MockEventSource();
+    openImageWorkspaceTaskEventsMock.mockResolvedValue(source as unknown as EventSource);
+    fetchImageWorkspaceTasksMock
+      .mockResolvedValueOnce([])
+      .mockResolvedValueOnce([])
+      .mockResolvedValueOnce([task]);
+
+    await useImageWorkspaceStore.getState().load();
+    await useImageWorkspaceStore.getState().confirmGeneration('quote-one');
+
+    expect(confirmImageWorkspaceGenerationMock).toHaveBeenCalledWith(
+      'workspace-one',
+      1,
+      'quote-one',
+      expect.stringMatching(/^turn-/),
+    );
+    expect(fetchImageWorkspaceTasksMock).toHaveBeenCalledTimes(3);
+    expect(useImageWorkspaceStore.getState().tasks).toEqual([task]);
+  });
+
+  it('does not silently complete confirmation when the quoted task stays missing', async () => {
+    const source = new MockEventSource();
+    openImageWorkspaceTaskEventsMock.mockResolvedValue(source as unknown as EventSource);
+    fetchImageWorkspaceTasksMock.mockResolvedValue([]);
+
+    await useImageWorkspaceStore.getState().load();
+    vi.useFakeTimers();
+    const outcome = useImageWorkspaceStore.getState().confirmGeneration('quote-one').then(
+      () => null,
+      (error: unknown) => error,
+    );
+    await vi.runAllTimersAsync();
+
+    await expect(outcome).resolves.toMatchObject({ code: 'generation_task_not_visible' });
+    expect(fetchImageWorkspaceTasksMock).toHaveBeenCalledTimes(6);
+    expect(useImageWorkspaceStore.getState().error)
+      .toContain('任务列表同步超时');
+  });
+
   it('closes the previous stream when switching workspaces and on reset', async () => {
     const first = new MockEventSource();
     const second = new MockEventSource();