docs(seo): use trailing-slash home URL for canonical/og/sitemap (matches 200 URL, avoids 301)

Author: zeative

docs/app/[[...mdxPath]]/page.jsx

@@ -8,7 +8,7 @@ export const generateStaticParams = generateStaticParamsFor('mdxPath')
 
 const pageUrl = (mdxPath) => {
   const slug = (mdxPath ?? []).join('/')
-  return slug ? `${SITE_URL}/${slug}` : SITE_URL
+  return slug ? `${SITE_URL}/${slug}` : `${SITE_URL}/`
 }
 
 const titleText = (metadata) => {

docs/app/layout.jsx

@@ -41,11 +41,11 @@ export const metadata = {
   ],
   icons: { icon: logoSrc, apple: logoSrc, shortcut: logoSrc },
   manifest: `${basePath}/manifest.webmanifest`,
-  alternates: { canonical: SITE_URL },
+  alternates: { canonical: `${SITE_URL}/` },
   openGraph: {
     type: 'website',
     locale: 'en_US',
-    url: SITE_URL,
+    url: `${SITE_URL}/`,
     siteName: 'Zaileys',
     title: 'Zaileys — Simplified WhatsApp API for Node.js & TypeScript',
     description: DESCRIPTION,

docs/app/sitemap.ts

@@ -27,7 +27,7 @@ export const dynamic = 'force-static'
 export default function sitemap(): MetadataRoute.Sitemap {
   const lastModified = new Date()
   return PAGES.map((slug) => ({
-    url: slug ? `${SITE_URL}/${slug}` : SITE_URL,
+    url: slug ? `${SITE_URL}/${slug}` : `${SITE_URL}/`,
     lastModified,
     changeFrequency: slug ? 'weekly' : 'daily',
     priority: slug ? (['getting-started', 'installation'].includes(slug) ? 0.9 : 0.8) : 1,