Replace Lucide icons with Remix Icon and add footer social links

components/layout/site-footer.tsx

@@ -1,4 +1,7 @@
+import { RiGithubFill, RiTwitterXFill } from "@remixicon/react"
+
 import { Brand } from "@/components/shared/brand"
+import { Button } from "@/components/ui/button"
 
 export function SiteFooter() {
   return (
@@ -18,8 +21,20 @@ export function SiteFooter() {
           <a className="hover:text-foreground" href="#top">Privacy</a>
         </div>
       </div>
-      <div className="mt-10 text-[11px] text-muted-foreground">
+      <div className="mt-10 flex flex-wrap items-center justify-between gap-4 text-[11px] text-muted-foreground">
         <span>© 2026 Vertex, Inc. All rights reserved.</span>
+        <div className="flex items-center gap-2">
+          <Button asChild variant="ghost" size="icon">
+            <a href="https://github.com" aria-label="GitHub">
+              <RiGithubFill className="size-4" aria-hidden="true" />
+            </a>
+          </Button>
+          <Button asChild variant="ghost" size="icon">
+            <a href="https://x.com" aria-label="X (Twitter)">
+              <RiTwitterXFill className="size-4" aria-hidden="true" />
+            </a>
+          </Button>
+        </div>
       </div>
     </footer>
   )