Add admin dashboard header

src/components/layout/AdminHeader.tsx

@@ -0,0 +1,40 @@
+import { Shield, ArrowLeft, Settings } from 'lucide-react';
+import { Button } from '@/components/ui/button';
+import { Link } from 'react-router-dom';
+import { ThemeToggle } from '@/components/theme/ThemeToggle';
+import { AuthButtons } from '@/components/auth/AuthButtons';
+
+export function AdminHeader() {
+  return (
+    <header className="sticky top-0 z-50 w-full border-b border-border bg-background/95 backdrop-blur supports-[backdrop-filter]:bg-background/60">
+      <div className="container flex h-16 items-center justify-between px-4">
+        {/* Left Section - Back to main site */}
+        <div className="flex items-center gap-4">
+          <Button variant="ghost" size="sm" asChild>
+            <Link to="/" className="flex items-center gap-2">
+              <ArrowLeft className="w-4 h-4" />
+              <span className="hidden sm:inline">Back to ThrillWiki</span>
+            </Link>
+          </Button>
+          
+          <div className="h-6 w-px bg-border hidden sm:block" />
+          
+          <div className="flex items-center gap-2">
+            <Shield className="w-6 h-6 text-primary" />
+            <h1 className="text-lg font-semibold">Admin Dashboard</h1>
+          </div>
+        </div>
+
+        {/* Right Section - Admin actions */}
+        <div className="flex items-center gap-2">
+          <Button variant="ghost" size="sm">
+            <Settings className="w-4 h-4" />
+            <span className="hidden sm:ml-2 sm:inline">Settings</span>
+          </Button>
+          <ThemeToggle />
+          <AuthButtons />
+        </div>
+      </div>
+    </header>
+  );
+}