Add marketing layout for pricing page

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/app/(marketing)/layout.tsx

@@ -0,0 +1,37 @@
+import Link from 'next/link'
+import { Button } from '@/components/ui/button'
+
+export default function MarketingLayout({
+  children,
+}: {
+  children: React.ReactNode
+}) {
+  return (
+    <div className="min-h-screen flex flex-col">
+      <header className="border-b bg-white/80 backdrop-blur-sm dark:bg-zinc-950/80 sticky top-0 z-50">
+        <nav className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 h-16 flex items-center justify-between">
+          <Link href="/" className="text-xl font-bold tracking-tight">
+            Mylder
+          </Link>
+          <div className="flex items-center gap-4">
+            <Link href="/pricing">
+              <Button variant="ghost" size="sm">Pricing</Button>
+            </Link>
+            <Link href="/login">
+              <Button variant="ghost" size="sm">Log in</Button>
+            </Link>
+            <Link href="/signup">
+              <Button size="sm">Get Started</Button>
+            </Link>
+          </div>
+        </nav>
+      </header>
+      <main className="flex-1">
+        {children}
+      </main>
+      <footer className="border-t py-8 text-center text-sm text-muted-foreground">
+        <p>&copy; {new Date().getFullYear()} Mylder. All rights reserved.</p>
+      </footer>
+    </div>
+  )
+}