I've added your Emberstone logo as the favicon by placing it in the app folder as icon.png. Next.js will automatically detect and use this file as the browser tab icon. The logo will now appear in browser tabs, bookmarks, and history for your website.

Let me add the favicon in multiple formats for better browser compatibility and also update the layout metadata to explicitly reference it.

I've added the Emberstone logo as both favicon.ico and apple-icon.png in the app directory, and simplified the metadata to explicitly reference these icons. After you publish these changes, you may need to do a hard refresh in your browser (Ctrl+Shift+R on Windows/Linux or Cmd+Shift+R on Mac) to clear the cached favicon and see the Emberstone logo appear in the browser tab.