fix: align teacher and operation composer heights

tests/e2e/pi-coding-first-chat.spec.ts

@@ -2018,6 +2018,17 @@ test('incomplete consultation replies retry only on click and preserve both draf
     const teacher = page.getByTestId('teacher-chat-panel');
     const draft = teacher.getByRole('textbox', { name: '向智能体提问' });
     await draft.fill('现在项目是什么阶段？');
+    await page.getByRole('tab', { name: '操作对话', exact: true }).click();
+    await expect(mainDraft).toBeVisible();
+    const [operationBox, teacherBox] = await Promise.all([
+      page.getByTestId('coding-message-composer').locator('.chat-composer-surface').boundingBox(),
+      teacher.locator('.consultation-composer').boundingBox(),
+    ]);
+    expect(operationBox).not.toBeNull();
+    expect(teacherBox).not.toBeNull();
+    expect(Math.abs(operationBox!.height - teacherBox!.height)).toBeLessThanOrEqual(1);
+    expect(Math.abs(operationBox!.y + operationBox!.height - teacherBox!.y - teacherBox!.height)).toBeLessThanOrEqual(1);
+    await expect(teacher.getByRole('button', { name: /添加图片|添加文件|老师模型/ })).toHaveCount(0);
     await teacher.getByRole('button', { name: '提问', exact: true }).click();
     await expect(teacher.getByRole('status')).toHaveText('这次回复未能完整显示');
     await expect(teacher.getByTestId('teacher-reply')).toHaveCount(0);