- Implemented DigitalHumanRecentTasks component for displaying recent tasks with modal support.
- Updated DigitalHumanUploadField to enhance upload functionality and UI.
- Created DigitalHumanVoiceSettings for managing voice settings with audio playback.
- Added digital human preview utilities for handling video sizes and parameters.
- Introduced digital human UI constants for task status and styles.
- Refactored styles in digital-human.less for improved layout and consistency.
- Developed hooks for advanced and basic video composition, managing common fields, and handling digital human insertion.

feat: update admin and learning apps to use React 19 and Ant Design 6, add loading fallback components

- Updated admin app to React 19 and Ant Design 6, ensuring both apps maintain separate routers, API clients, and build outputs.
- Introduced `LoadingFallback` component for better user experience during loading states in both apps.
- Refactored routes in the learning app to utilize lazy loading for improved performance.
- Added linting and type checking commands for better code quality assurance.
- Updated documentation to reflect changes in project structure and usage instructions.