```js
// .storybook/main.js|cjs|ts

const { mergeConfig } = require('vite');

module.exports = {
  stories: ['../stories/**/*.stories.mdx', '../stories/**/*.stories.@(js|jsx|ts|tsx)'],
  addons: ['@storybook/addon-links', '@storybook/addon-essentials'],
  core: {
    builder: '@storybook/builder-vite',
  },
  async viteFinal(config) {
    // Merge custom configuration into the default config
    return mergeConfig(config, {
      // Use the same "resolve" configuration as your app
      resolve: (await import('../vite.config.js')).default.resolve,
      // Add dependencies to pre-optimization
      optimizeDeps: {
        include: ['storybook-dark-mode'],
      },
    });
  },
};
```