Debug and fix Amplify environment variable access

- Add debugging commands to check environment variables
- Improve .env.production file creation logic
- Remove env config from next.config.ts to avoid conflicts

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

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

next.config.ts

@@ -24,9 +24,6 @@ const nextConfig: NextConfig = {
       },
     ],
   },
-  env: {
-    YOUTUBE_API_KEY: process.env.YOUTUBE_API_KEY || '',
-  },
 };
 
 export default nextConfig;