Restore old color scheme for checkout success page

- Changed header gradient from darker cyan-blue-indigo to brighter cyan-blue
- Matches original design with more vibrant teal/cyan colors
- Updated from-cyan-500 via-blue-500 to-indigo-600 → from-cyan-400 to-blue-400

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

app/checkout/success/page.tsx

@@ -290,7 +290,7 @@ export default function CheckoutSuccessPage() {
               initial={{ opacity: 0, y: -20 }}
               animate={{ opacity: 1, y: 0 }}
               transition={{ delay: 0.1 }}
-              className="bg-gradient-to-br from-cyan-500 via-blue-500 to-indigo-600 p-8 text-center"
+              className="bg-gradient-to-br from-cyan-400 to-blue-400 p-8 text-center"
             >
               <img
                 src="/puffinOffset.webp"

next-env.d.ts

@@ -1,6 +1,6 @@
 /// <reference types="next" />
 /// <reference types="next/image-types/global" />
-import "./.next/dev/types/routes.d.ts";
+import "./.next/types/routes.d.ts";
 
 // NOTE: This file should not be edited
 // see https://nextjs.org/docs/app/api-reference/config/typescript for more information.