fix(ui): clarify teacher help prompt and fit narrow panels

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

@@ -1869,7 +1869,7 @@ test('project consultations preserve student drafts and switch between work and
     await expect(page.getByRole('button', { name: '与朋友聊天' })).toHaveAttribute('aria-pressed', 'true');
     await expect(page.locator('#coding-consultation-dock')).toHaveCSS('width', '508px');
     await expect(teacher.locator('form .consultation-hint')).toBeVisible();
-    await expect(teacher.locator('form .consultation-hint')).toHaveText('帮我看看');
+    await expect(teacher.locator('form .consultation-hint')).toHaveText('不知道问什么，你先帮我看看👀');
     await expect(teacher.getByText('把你的困惑说出来就好')).toHaveCount(0);
     await expect(teacher.getByText('当前项目',{exact:true})).toHaveCount(0);
     await expect(teacher.getByRole('button',{name:'解释当前代码',exact:true})).toBeVisible();
@@ -1924,7 +1924,7 @@ test('project consultations preserve student drafts and switch between work and
       expect(request.body).not.toHaveProperty('discussion');
     }
     await expect(teacher).toHaveAccessibleName('朋友咨询');
-    expect(consultationRequests[0].body).toMatchObject({intent:'suggestions',text:'帮我看看'});
+    expect(consultationRequests[0].body).toMatchObject({intent:'suggestions',text:'不知道问什么，你先帮我看看👀'});
     expect(consultationRequests[1].body).toMatchObject({text:'怎样观察别人玩游戏？'});
     expect(consultationRequests[1].body?.intent).toBeUndefined();
     await page.screenshot({path:test.info().outputPath('project-teacher-side-chat.png')});