fix: trailing slash on /features/ and /downloads/ links, rel on install links

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: JoeMatt

src/app/downloads/page.tsx

@@ -236,7 +236,7 @@ export default function DownloadsPage() {
                   Using AltStore / SideStore (Recommended)
                 </h3>
                 <ol className="list-decimal list-inside space-y-2 ml-4">
-                  <li>Install <a href="https://altstore.io" className="text-blue-600 dark:text-blue-400 hover:underline">AltStore</a> or <a href="https://sidestore.io" className="text-blue-600 dark:text-blue-400 hover:underline">SideStore</a> on your device</li>
+                  <li>Install <a href="https://altstore.io" target="_blank" rel="noopener noreferrer" className="text-blue-600 dark:text-blue-400 hover:underline">AltStore</a> or <a href="https://sidestore.io" target="_blank" rel="noopener noreferrer" className="text-blue-600 dark:text-blue-400 hover:underline">SideStore</a> on your device</li>
                   <li>Tap the &quot;Add to AltStore&quot; or &quot;Add to SideStore&quot; button above</li>
                   <li>Browse to iCube in the app and tap &quot;Install&quot;</li>
                   <li>Enjoy automatic updates!</li>

src/app/not-found.tsx

@@ -23,7 +23,7 @@ export default function NotFound() {
             Go Home
           </Link>
           <Link
-            href="/downloads"
+            href="/downloads/"
             className="bg-gray-200 hover:bg-gray-300 dark:bg-gray-700 dark:hover:bg-gray-600 text-gray-900 dark:text-white px-6 py-3 rounded-lg font-semibold transition-colors"
           >
             Downloads

src/app/page.tsx

@@ -177,7 +177,7 @@ export default function Home() {
           </h2>
           <Features compact />
           <div className="text-center mt-8">
-            <a href="/features" className="text-blue-600 dark:text-blue-400 hover:underline font-semibold">See all features →</a>
+            <a href="/features/" className="text-blue-600 dark:text-blue-400 hover:underline font-semibold">See all features →</a>
           </div>
         </div>
       </section>