收口创作代理聊天面板组件

creation-agent 工作台聊天区外壳改用 PlatformSubpanel

工作台测试断言消息列表接入公共子面板外壳

补充 PlatformUiKit 收口文档和 Hermes 决策记录

src/components/creation-agent/CreationAgentWorkspace.test.tsx

@@ -85,6 +85,11 @@ test('creation agent workspace keeps initial chat progress at zero percent', ()
     'creation-agent-progress-label',
   );
   expect(progressbar.className).toContain('platform-progress-track');
+  expect(
+    screen
+      .getByTestId('creation-agent-message-list')
+      .closest('.platform-subpanel')?.className,
+  ).toContain('rounded-[1.5rem]');
   expect(
     (progressbar.firstElementChild as HTMLElement | null)?.style.width,
   ).toBe('0%');