Add robust testing framework to prevent regression of edit mode:
- Comprehensive regression tests for JavaScript syntax validation
- Build-time JavaScript validation tool with Node.js integration
- Enhanced error tracking with detailed logging and recovery
- Makefile integration for `make validate-js` command
Features:
- Validates JavaScript syntax in generated HTML templates
- Detects common issues like broken string literals and brace escaping
- Enhanced error reporting with timestamps and context
- Automatic error recovery for graceful degradation
- Build validation to catch syntax errors before deployment
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
