feat(website): mount PageActions in the docs page header

Author: blove

apps/website/e2e/docs.spec.ts

@@ -64,6 +64,8 @@ test.describe('Docs slug page', () => {
     await expect(page.getByText(/LangGraph\s+·\s+Getting Started/i).first()).toBeVisible();
     // Prev/Next: introduction is the first page, so a "Next →" card is present
     await expect(page.getByText('Next →').first()).toBeVisible();
+    // Per-page LLM actions trigger
+    await expect(page.locator('main button[aria-label="Page actions"]').first()).toBeVisible();
   });
 
   test('breadcrumb shows the library + page title', async ({ page }) => {

apps/website/src/app/docs/[library]/[section]/[slug]/page.tsx

@@ -6,6 +6,7 @@ import { MdxRenderer } from '../../../../../components/docs/MdxRenderer';
 import { DocsSearch } from '../../../../../components/docs/DocsSearch';
 import { DocsBreadcrumb } from '../../../../../components/docs/DocsBreadcrumb';
 import { DocsPageHeader } from '../../../../../components/docs/DocsPageHeader';
+import { PageActions } from '../../../../../components/docs/PageActions';
 import { DocsPrevNext } from '../../../../../components/docs/DocsPrevNext';
 import { getDocBySlug, getAllDocSlugs, getDocMetadata } from '../../../../../lib/docs';
 import { ApiDocRenderer, type ApiDocEntry } from '../../../../../components/docs/ApiDocRenderer';
@@ -74,7 +75,11 @@ export default async function DocsPage({ params }: DocsRouteProps) {
         <div className="flex-1 min-w-0">
           <div className="px-6 md:px-12 pt-6">
             <DocsBreadcrumb library={library as LibraryId} section={section} slug={slug} title={doc.title} />
-            <DocsPageHeader library={library as LibraryId} section={section} />
+            <DocsPageHeader
+              library={library as LibraryId}
+              section={section}
+              actions={<PageActions library={library} section={section} slug={slug} />}
+            />
           </div>
           <article className="flex-1 py-8 px-4 sm:px-6 md:px-12 md:max-w-3xl overflow-x-hidden">
             <MdxRenderer