Tweak card images, dark mode text, social links, and add right sidebar

components/site-header.tsx

@@ -4,8 +4,8 @@ import { siteConfig } from '@/lib/config';
 
 export function SiteHeader() {
   return (
-    <header className="border-b bg-white/80 dark:bg-gray-950/80 backdrop-blur">
-      <div className="container mx-auto flex items-center justify-between px-4 py-3">
+    <header className="border-b bg-white/80 backdrop-blur dark:bg-gray-950/80">
+      <div className="container mx-auto flex items-center justify-between px-4 py-3 text-slate-900 dark:text-slate-100">
         <Link href="/" className="font-semibold">
           {siteConfig.title}
         </Link>