Restore page title and logo

Restored the page title "AI conference deadlines" and the Hugging Face logo to the header.

src/components/Header.tsx

@@ -14,8 +14,15 @@ const Header = ({ onSearch }: HeaderProps) => {
       <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
         <div className="flex items-center justify-between h-16">
           <div className="flex items-center gap-8">
-            <Link to="/" className="text-2xl font-bold text-primary">
-              AI Deadlines
+            <Link to="/" className="flex items-center gap-2">
+              <img 
+                src="https://huggingface.co/front/assets/huggingface_logo.svg" 
+                alt="Hugging Face Logo" 
+                className="h-8 w-8"
+              />
+              <span className="text-2xl font-bold text-primary">
+                AI Conference Deadlines
+              </span>
             </Link>
             <nav className="hidden md:flex space-x-4">
               <Link