hemanthpallapothu/ai-powered-thumbnail-generator ? reverse-engineered prompt

Build me a full stack app called Thumblify that helps creators make YouTube style thumbnails with AI.

I want users to sign up, log in, and stay signed in with JWT. After logging in, they should be able to generate thumbnails from a topic, style, colors, and extra notes, or recreate an existing thumbnail by uploading a source image or pasting an image link and describing what to change. Use AI to improve the prompt before generating the image, and make the generation feel fast and simple.

Each user should start with 15 credits and lose 1 credit per thumbnail they generate. Save every generated thumbnail in a personal library where users can view, download, and delete their images. Also add a community feed where public thumbnails can be browsed and liked.

Make it look modern and creator friendly, with a clean homepage, generate page, login page, my generations page, and community page. If you need to look up current docs online, go ahead.