收口作品详情底部动作

将作品详情改造编辑和启动按钮迁移到 PlatformActionButton

保留详情页底部局部样式类控制 sticky 动作栏

补充底部动作公共按钮断言

更新 PlatformUiKit 文档和 Hermes 决策记录

src/components/platform-entry/PlatformWorkDetailView.test.tsx

@@ -147,8 +147,12 @@ test('PlatformWorkDetailView renders compact stats and date time', () => {
     'platform-icon-button',
   );
   expect(screen.getByRole('button', { name: '点赞 4赞' })).toBeTruthy();
-  expect(screen.getByRole('button', { name: '作品改造' })).toBeTruthy();
-  expect(screen.getByRole('button', { name: '启动' })).toBeTruthy();
+  const remixAction = screen.getByRole('button', { name: '作品改造' });
+  const startAction = screen.getByRole('button', { name: '启动' });
+  expect(remixAction.className).toContain('platform-button');
+  expect(remixAction.className).toContain('platform-work-detail__remix');
+  expect(startAction.className).toContain('platform-button');
+  expect(startAction.className).toContain('platform-work-detail__start');
 });
 
 test('PlatformWorkDetailView prefers resolved public user display name', () => {

src/components/platform-entry/PlatformWorkDetailView.tsx

@@ -18,6 +18,7 @@ import type { PublicUserSummary } from '../../../packages/shared/src/contracts/a
 import { buildPublicWorkDetailUrl } from '../../routing/appPageRoutes';
 import { CopyCodeButton } from '../common/CopyCodeButton';
 import { CopyFeedbackMessage } from '../common/CopyFeedbackMessage';
+import { PlatformActionButton } from '../common/PlatformActionButton';
 import { PlatformIconButton } from '../common/PlatformIconButton';
 import { useCopyFeedback } from '../common/useCopyFeedback';
 import { ResolvedAssetImage } from '../ResolvedAssetImage';
@@ -454,24 +455,29 @@ export function PlatformWorkDetailView({
       </div>
 
       <div className="platform-work-detail__bottom">
-        <button
-          type="button"
+        <PlatformActionButton
+          tone="secondary"
+          shape="pill"
+          size="lg"
+          fullWidth
           className="platform-work-detail__remix"
           onClick={onRemix}
           disabled={isBusy}
         >
           <WorkActionIcon className="h-5 w-5" />
           {workActionLabel}
-        </button>
-        <button
-          type="button"
+        </PlatformActionButton>
+        <PlatformActionButton
+          shape="pill"
+          size="lg"
+          fullWidth
           className="platform-work-detail__start"
           onClick={onStart}
           disabled={isBusy}
         >
           <Play className="h-5 w-5 fill-current" />
           启动
-        </button>
+        </PlatformActionButton>
       </div>
     </div>
   );