- Refactor file tree logic into `SimpleFileTree` class
- Implement new explorer with collapse, refresh, search, and selection controls
- Redesign selection, prompt, and chat workspaces with new layouts and styles
- Introduce dedicated CSS icon set for various UI elements
- Add prompt generation and clipboard copy functionality for prompt output
- Refactor all UI rendering logic into a single `ui` module
- Centralize static assets serving to `/static` directory
- Redesign Heroprompt page with Bootstrap 5 components
- Enhance workspace management and file tree interactions
- Add Bootstrap modal support for UI dialogs