suifeng9203/HeyGem.ai ? reverse-engineered prompt

Build me a desktop app for creating AI digital human videos, like a local open source alternative to HeyGen.

I want a simple interface where I can upload or choose a face image, add a voice or text script, pick a few basic settings, and then generate a talking video with lip sync. It should feel like a real product a person can use, not a developer demo. Please make the app run locally, with a clean modern UI, and include both Chinese and English if possible.

If you need to check the latest setup details or model docs online, go ahead. Make sure the project can be built and launched easily on a fresh machine, and include whatever desktop packaging or install flow is needed for Ubuntu as well. Keep the experience straightforward, with clear progress while generating and an easy way to preview or save the final result.