fix(seo): address review nitpicks

- Add trailing slash to JSON-LD url for consistency
- Add /api/ to robots.txt disallow rules (defensive)
- Remove /login from sitemap.xml (auth pages shouldn't be indexed)

Author: DevanshuNEU

frontend/index.html

@@ -52,7 +52,7 @@
       "applicationCategory": "DeveloperApplication",
       "operatingSystem": "Web",
       "description": "Semantic code search powered by AI. Index your repos and search by meaning, not just keywords.",
-      "url": "https://opencodeintel.com",
+      "url": "https://opencodeintel.com/",
       "offers": {
         "@type": "Offer",
         "price": "0",

frontend/public/robots.txt

@@ -9,6 +9,7 @@ Disallow: /dashboard
 Disallow: /settings
 Disallow: /repos/
 Disallow: /callback
+Disallow: /api/
 
 # Sitemap location
 Sitemap: https://opencodeintel.com/sitemap.xml

frontend/public/sitemap.xml

@@ -6,10 +6,4 @@
     <changefreq>weekly</changefreq>
     <priority>1.0</priority>
   </url>
-  <url>
-    <loc>https://opencodeintel.com/login</loc>
-    <lastmod>2026-02-17</lastmod>
-    <changefreq>monthly</changefreq>
-    <priority>0.5</priority>
-  </url>
 </urlset>