phsl / new-api

⚡ perf: optimize CodeViewer performance for large content rendering

- Add intelligent content truncation for payloads over 50K characters
- Implement tiered performance handling based on content size
- Use useMemo and useCallback for memory optimization and caching
- Add progressive loading with async processing for very large content
- Introduce performance warning indicators and user feedback
- Create expand/collapse functionality with smooth animations
- Skip syntax highlighting for extremely large content (>100K)
- Add loading states and debounce handling for better UX
- Display remaining content size indicators (e.g., +15K)
- Implement chunk-based processing to prevent UI blocking

This optimization ensures that even multi-megabyte JSON responses
won't cause page freezing or performance degradation in the debug
panel, while maintaining full functionality for regular-sized content.