Added comprehensive debugging tools and documentation for API connection issues.
Changes:
- Created test-api-connection.sh - Automated diagnostic script
- Created DEBUGGING_GUIDE.md - Step-by-step debugging guide
- Created API_CONNECTION_FIX_SUMMARY.md - Complete fix summary
- Updated progress.md with API connection debugging enhancement entry
These tools help diagnose and resolve frontend-backend connection issues.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
