Generate Test Coverage Report

Run test suite and generate a coverage report:

1. Run the full test suite: npm test or equivalent
2. Generate coverage report in JSON format: npm run test:coverage
3. Parse the coverage data to identify:
   • Overall coverage percentage (lines, branches, functions, statements)
   • Files with coverage below 80%
   • Files with coverage below 50% (critical)
   • Coverage trends (if previous reports exist)

Create a markdown summary showing:

• Overall coverage metrics with visual progress bars
• Top 5 files needing coverage improvements
• Test results: total tests, passed, failed, skipped
• Recommendations for improving test coverage

Include emoji indicators for health status:

• 🟢 Excellent (>90%)
• 🟡 Good (70-90%)
• 🔴 Needs attention (<70%)