Add the following icon files to this directory:
- icon-192.png: 192x192px PNG, the plugin/collection logo
- icon-512.png: 512x512px PNG, the plugin/collection logo (larger)

These are required for the PWA install prompt and home screen icon.
Use a solid colored background with the comic book icon.
Suggested: gold (#f59e0b) background with white comic book silhouette icon.
