diff --git a/apps/ai-game-creator-shell/tests/appSurface/project-development.suite.ts b/apps/ai-game-creator-shell/tests/appSurface/project-development.suite.ts
index 6aa05e4bc..638d0b31f 100644
--- a/apps/ai-game-creator-shell/tests/appSurface/project-development.suite.ts
+++ b/apps/ai-game-creator-shell/tests/appSurface/project-development.suite.ts
@@ -8423,6 +8423,114 @@ export function registerProjectSupervisorSurfaceTests() {
     });
   });
 
+  it('keeps pulling earlier pages while the page only deepens the rendered turn', async () => {
+    // 用户报的现象：一屏 20 条全是同一个回合的工具卡片，落在折叠的「执行过程」里，
+    // 点一次「显示更早」看不到任何变化。连拉必须越过这一屏，直到出现新的用户气泡。
+    const projectPath = '/tmp/launcher-direct-history-cross-page-game';
+    const manifest = createGameCreationAppManifest(
+      'local-project-draft',
+      'launcher-direct-history-cross-page-game',
+    );
+    const supervisorHarness = createProjectSupervisorRuntimeHarness({
+      projectPath,
+    });
+    // 51 条：用户气泡 + 50 条工具条目。首屏取尾 20 条（process-31..process-50），
+    // 第一次翻页再取 20 条（process-11..process-30），都还在同一个回合里。
+    supervisorHarness.setDirectThreadHistory([
+      {
+        itemType: 'message',
+        itemId: 'direct-codex:turn-更早:user',
+        role: 'user',
+        text: '更早的用户提问',
+        at: 1000,
+      },
+      ...Array.from({ length: 50 }, (_, index) => ({
+        itemType: 'function_call',
+        itemId: `process-${index + 1}`,
+        name: 'exec_command',
+        arguments: `echo ${index + 1}`,
+        at: 1100 + index,
+      })),
+    ]);
+    const invoke = vi.fn(
+      async (command: string, args?: Record<string, unknown>) => {
+        if (command === 'get_design_agent_runtime_mode') return null;
+        if (command === 'inspect_local_project_directory') {
+          return {
+            projectPath,
+            exists: true,
+            isDirectory: true,
+            isGameCreatorProject: true,
+            projectName: 'launcher-direct-history-cross-page-game',
+            recentRunStatus: null,
+            recentRunStopReason: null,
+          };
+        }
+        if (command === 'get_local_game_manifest') {
+          return manifest;
+        }
+        if (command === 'get_local_game_preview_status') {
+          return { status: 'stopped', url: null, port: null, root: null };
+        }
+        return supervisorHarness.invoke(command, args);
+      },
+    );
+    window.__TAURI__ = {
+      core: { invoke },
+      event: { listen: supervisorHarness.listen },
+    };
+    renderLauncherProjectsAt('/?launcher');
+
+    pickProjectFromLauncher(projectPath);
+
+    const supervisorSurface = await screen.findByLabelText('陶泥儿项目对话');
+    await waitFor(() =>
+      expect(invoke).toHaveBeenCalledWith('read_direct_project_history_slice', {
+        projectPath,
+        limit: 20,
+      }),
+    );
+    // 首屏只有这个回合的执行过程：用户气泡还在更早的页里。
+    expect(within(supervisorSurface).queryByText('更早的用户提问')).toBeNull();
+
+    // 视口停在列表中部（既不在顶部触发自动翻页，也不在底部跟随最新）。
+    const messageList = screen.getByLabelText('陶泥儿消息') as HTMLDivElement;
+    let messageScrollHeight = 600;
+    Object.defineProperty(messageList, 'scrollHeight', {
+      configurable: true,
+      get: () => messageScrollHeight,
+    });
+    Object.defineProperty(messageList, 'clientHeight', {
+      configurable: true,
+      get: () => 100,
+    });
+    messageList.scrollTop = 100;
+    fireEvent.scroll(messageList);
+    // 插入后列表会变长：跟随最新的话视口会被拉到这个高度。
+    messageScrollHeight = 2000;
+
+    fireEvent.click(screen.getByRole('button', { name: '显示更早的对话' }));
+
+    // 一次点击连拉两页：第一页仍然只有执行过程，第二页才带回用户气泡。
+    expect(
+      await within(supervisorSurface).findByText('更早的用户提问'),
+    ).not.toBeNull();
+    expect(invoke).toHaveBeenCalledWith('read_direct_project_history_slice', {
+      projectPath,
+      beforeItemId: 'process-31',
+      limit: 20,
+    });
+    expect(invoke).toHaveBeenCalledWith('read_direct_project_history_slice', {
+      projectPath,
+      beforeItemId: 'process-11',
+      limit: 20,
+    });
+    // 取到文件头后按钮收起。
+    expect(screen.queryByRole('button', { name: /显示更早/ })).toBeNull();
+    // 连拉插入的旧内容不得把视口弹到列表底部。
+    expect(messageList.scrollTop).toBe(100);
+  });
+
   it('drains a notify that lands before the subscribe receipt so the running turn is not stranded', async () => {
     // 真实竞态：`subscribe` 在 Rust 侧已经注册好 subscriber 并开始通知，但前端还没拿到
     // subscriptionId。此时的通知不能白丢——拿到回执后必须补一次 consume，否则整个回合会卡在队列里。