When using `shopify theme dev`, which theme are you working on? 🛠️

### Explanation When you run `shopify theme dev`, Shopify CLI: - Creates a development theme in your store - Syncs your local files to this development theme - Hot-reloads changes as you work - Does not affect your live/published theme Key points: - Development theme is temporary - Safe to experiment without affecting live site Reference: [Shopify Theme Development](https://shopify.dev/docs/themes/tools/cli/theme-commands#dev)