Restore glassmorphism UI, add generation time metadata, and Medium model tier

Redesign UI/UX with Neo-Design, add Medium model, and message metadata

Remove training/indexing and encryption. Use data.json directly.

Implement Multi-Tier Model Selection and Background Tasks

Upload index.html

Upload index.html

Upload index.html

Upload index.html

Upload index.html

Upload index.html

Upload index.html

Upload index.html

Create templates/index.html