隐藏传播进度重复提示

- 传播进度蓝色面板显示任务 message 时隐藏顶栏左侧灰色 statusMessage，避免同一传播文字重复出现。

- 补充 VideoWorkspace 回归测试，确认传播运行提示只出现一次且位于进度面板内。

- 更新前端审计、设计冻结、测试计划和项目指南文档。

src/components/VideoWorkspace.test.tsx

@@ -2029,13 +2029,21 @@ describe('VideoWorkspace', () => {
       bbox: [0.1, 0.1, 0.2, 0.2],
     });
     apiMock.queuePropagationTask.mockResolvedValueOnce({ id: 44, status: 'queued', progress: 0, message: '自动传播任务已入队' });
-    apiMock.getTask.mockResolvedValueOnce({
-      id: 44,
-      status: 'success',
-      progress: 100,
-      message: '自动传播完成，但没有生成新的 mask',
-      result: { processed_frame_count: 2, created_annotation_count: 0, completed_steps: 1 },
-    });
+    apiMock.getTask
+      .mockResolvedValueOnce({
+        id: 44,
+        status: 'running',
+        progress: 25,
+        message: '自动传播任务 #44 运行中...',
+        result: { processed_frame_count: 1, created_annotation_count: 0, completed_steps: 0 },
+      })
+      .mockResolvedValueOnce({
+        id: 44,
+        status: 'success',
+        progress: 100,
+        message: '自动传播完成，但没有生成新的 mask',
+        result: { processed_frame_count: 2, created_annotation_count: 0, completed_steps: 1 },
+      });
 
     render(<VideoWorkspace />);
     await waitFor(() => expect(useStore.getState().frames).toHaveLength(2));
@@ -2060,8 +2068,13 @@ describe('VideoWorkspace', () => {
     const progressPanel = await screen.findByLabelText('自动传播进度');
     expect(progressPanel).toBeInTheDocument();
     expect(within(progressPanel).getByText('0%')).toBeInTheDocument();
+    await waitFor(() => {
+      expect(screen.getAllByText('自动传播任务 #44 运行中...')).toHaveLength(1);
+      expect(within(screen.getByLabelText('自动传播进度')).getByText('自动传播任务 #44 运行中...')).toBeInTheDocument();
+    });
 
-    expect(await screen.findByText(/没有生成新的 mask/)).toBeInTheDocument();
+    await waitFor(() => expect(apiMock.getTask).toHaveBeenCalledTimes(2), { timeout: 3000 });
+    await waitFor(() => expect(screen.getByText(/没有生成新的 mask/)).toBeInTheDocument(), { timeout: 3000 });
   });
 
   it('lets users select the propagation range on the timeline before queueing', async () => {

src/components/VideoWorkspace.tsx

@@ -1836,7 +1836,7 @@ export function VideoWorkspace({ onNavigateToAI }: { onNavigateToAI?: () => void
           <span className="text-sm text-white font-mono">{currentProject?.name || '未选择项目'}</span>
         </div>
         <div className="flex items-center gap-3">
-          {statusMessage && (
+          {statusMessage && !propagationProgress && (
             <span className="text-[10px] text-gray-500 font-mono max-w-48 truncate" title={statusMessage}>
               {statusMessage}
             </span>