feat: agent system optimization and enhancement

[yhjun1026]

Summary

This PR includes comprehensive optimizations and enhancements to the agent system, visualization push system, and file handling capabilities.

Key Changes

Agent System Optimization

• Implemented agent alias system for better agent management
• Enhanced agent initialization and configuration handling
• Improved agent memory management and conversation history
• Added vis_push_manager and vis_push_hooks for real-time visualization updates

File Upload & Preview

• Added multi-file upload support with drag-and-drop
• Implemented image preview functionality
• Added retry mechanism for failed uploads
• Enhanced file dispatch system

Authorization System

• New authorization middleware for tool execution
• Permission management and risk assessment
• Authorization guide documentation

Frontend Improvements

• Optimized chat interface with unified input component
• Added system events visualization components
• Enhanced configuration settings page
• Improved agent skills management interface

Infrastructure

• Added input queue manager for handling user inputs
• Improved multimodal support
• Enhanced error handling for LLM responses
• Better file storage integration with sandbox

Code Cleanup

• Removed deprecated derisk/context and derisk/core modules
• Migrated functionality to new architecture
• Added comprehensive documentation

Files Changed

• 483 files changed
• 20,983 insertions(+)
• 16,889 deletions(-)

Testing

• Manual testing performed on agent interactions
• File upload and preview verified
• Authorization flow tested
• Frontend UI validation completed

[csunny]

LGTM～