I've made the tool mobile-friendly and added an OpenGraph image:

1. Mobile responsiveness - Canvas now adapts to viewport size on mobile. Added touch event handlers (onTouchStart, onTouchMove, onTouchEnd) for dragging and resizing magnifiers on touch devices. The control panel slides in from the right on mobile with a hamburger menu toggle.
2. OpenGraph image - Created app/opengraph-image.tsx using Next.js's built-in ImageResponse. It displays a clean preview with a magnifier icon, title, description, and feature pills. This will show when sharing on social media.
3. Viewport settings - Added proper viewport configuration to prevent unwanted zoom on mobile and set the theme color to match the background.

Added the tool title "Image Magnifier", description, and credit links to the empty drop zone state. The layout now shows a clean centered stack with the title at the top, followed by the drop zone, and the credits at the bottom - matching the style of the floating panel credits.