Introduces a new /api/add-page endpoint for adding pages to existing comics, refactors prompt construction into a shared utility (lib/prompt.ts), and updates the editor and modal components to use the new API and prompt builder. Removes manual style and character selection in the modal, streamlining the page generation workflow and ensuring previous story context is referenced automatically.
Shifted the info and redraw buttons from the editor toolbar to the ComicCanvas component, allowing for contextual actions per page. Enhanced ComicCanvas to support page navigation via image clicks and added optional callbacks for info and navigation. Updated the page sidebar to display page thumbnails instead of numbers, improved the add page button, and adjusted button sizes for better usability.