fix(site): redirect trailing-slash URLs via edge function (#885)

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

site/netlify/edge-functions/trailing-slash.ts

@@ -0,0 +1,21 @@
+import type { Config } from '@netlify/edge-functions';
+
+export default async (request: Request) => {
+  const url = new URL(request.url);
+  const redirectUrl = new URL(url.pathname.replace(/\/$/, ''), url.origin);
+  redirectUrl.search = url.search;
+  redirectUrl.hash = url.hash;
+
+  return new Response(null, {
+    status: 301,
+    headers: {
+      location: redirectUrl.toString(),
+      'cache-control': 'public, max-age=86400',
+    },
+  });
+};
+
+export const config: Config = {
+  cache: 'manual',
+  pattern: '.+/$',
+};

site/src/pages/rss.xml.js

@@ -9,9 +9,10 @@ export async function GET(context) {
     title: SITE_TITLE,
     description: SITE_DESCRIPTION,
     site: context.site,
+    trailingSlash: false,
     items: posts.map((post) => ({
       ...post.data,
-      link: `/blog/${post.id}/`,
+      link: `/blog/${post.id}`,
     })),
   });
 }