feat: comprehensive debug logging system with capture and download

[Stijnus]

Add a robust debug logging system that captures application state, user interactions, and system diagnostics for enhanced troubleshooting and development experience.

✨ Features Added

🔍 Multi-Source Data Capture

• Console Logging: Captures all console.log, console.warn, console.error
• Error Handling: Intercepts JavaScript errors and unhandled promise rejections
• Network Monitoring: Tracks all fetch requests with timing and status
• User Actions: Records user interactions and UI events
• Terminal Activity: Captures shell input/output with ANSI cleaning
• Performance Metrics: Memory usage, page load times, paint timing

📊 System Information Collection

• Platform detection (macOS, Windows, Linux)
• Browser and viewport information
• Git repository status (branch, commit, dirty state)
• Application state (model, provider, workbench view)
• Performance and memory statistics

🎯 User Interface Integration

• Avatar Dropdown: "Download Debug Log" option with download icon
• Header Actions: "Debug Log" button alongside existing "Report Bug"
• One-Click Download: Generates comprehensive debug reports
• Error Handling: Graceful degradation with user feedback

🔧 Technical Implementation

• Circular Buffers: Memory-efficient storage with fixed capacity (1K entries)
• Lazy Loading: Zero performance impact when disabled (default state)
• Debouncing: Terminal logs debounced at 100ms to prevent spam
• JSON Safe: Circular reference protection and depth limiting
• Async Operations: Non-blocking debug operations

📁 Files Modified

• app/utils/debugLogger.ts (1,284 lines) - Core debug logging utility
• app/utils/logger.ts - Integration with existing logging system
• app/utils/shell.ts - Terminal activity capture
• app/components/@settings/core/AvatarDropdown.tsx - UI integration
• app/components/header/HeaderActionButtons.client.tsx - Header button
• app/root.tsx - Initialization and setup
• app/routes/api.git-info.ts - Git information endpoint

🚀 Benefits

• Enhanced Debugging: Comprehensive data collection for issue reproduction
• Performance Monitoring: Built-in performance tracking and memory analysis
• User Support: Easy debug log generation for support tickets
• Developer Experience: Rich debugging data without performance penalty
• Production Ready: Opt-in system with zero impact on regular users

🔒 Security & Privacy

• Client-side only operation (no server transmission)
• User-controlled data collection and export
• No sensitive information captured automatically
• Manual opt-in required for debug mode activation

📈 Performance Impact

• Disabled by Default: No performance impact for regular users
• Lazy Initialization: Components loaded only when needed
• Memory Bounded: Fixed-size buffers prevent memory leaks
• Non-Blocking: All operations are asynchronous
• Efficient Storage: Circular buffers with automatic cleanup

🔄 Integration Points

• Seamlessly integrates with existing logger utility
• Compatible with current shell/terminal implementation
• Works with existing error handling patterns
• Maintains backward compatibility

This implementation provides developers and users with powerful debugging capabilities while maintaining excellent performance and user experience.