Vite Path Aliases Not Resolving in Build

1. Alias defined in vite.config.js but not tsconfig.json
2. tsconfig.json baseUrl or paths incorrect
3. Alias path doesn't exist or wrong relative path
4. TypeScript not finding module even though Vite does
5. Build using wrong config file

Configure in both vite.config.js and tsconfig.json:

// vite.config.js
export default {
  resolve: {
    alias: {
      '@': '/src'
    }
  }
}

// tsconfig.json
{
  "compilerOptions": {
    "baseUrl": ".",
    "paths": {
      "@/*": ["src/*"]
    }
  }
}