docs: update performance-testing.md with current metrics and add README performance section

[Copilot]

Pull Request Description

The docs/performance-testing.md file already existed with comprehensive documentation meeting all ISMS Secure Development Policy §8 requirements. Updated with current build metrics and enhanced README visibility.

Changes:

• Updated performance-testing.md dates (2025-11-14 → 2025-11-15)
• Corrected bundle metrics to match current build (~743.92 KB raw / ~201.46 KB gzip)
• Added "Performance & Optimization" section to README.md with badges and metrics
• JavaScript bundle 4.6% over 180 KB target (188.36 KB) but within 500 KB total budget

Current Performance:

• Total: 201.46 KB (gzip) ✅ 59.7% under budget
• JavaScript: 188.36 KB (gzip) ⚠️ 4.6% over target
• Stylesheets: 12.55 KB (gzip) ✅ 74.9% under budget

Type of Change

• 🚀 New Feature/Enhancement
• 🐛 Bug Fix
• 📈 Analytics & Visualization
• 🎨 UI/UX Improvements
• 🏗️ Infrastructure & Performance
• 🔄 Code Quality & Refactoring
• 🔒 Security & Compliance
• 📝 Documentation
• 📦 Dependencies Update

Component(s) Modified

• App Core
• Dashboard
• Radar Chart
• Security Level Widget
• Business Impact Analysis Widget
• Compliance Status Widget
• Cost Estimation Widget
• Security Summary Widget
• Value Creation Widget
• Constants / Data Model
• Hooks

CIA Impact Area

• Confidentiality
• Integrity
• Availability

Security Level Impact

• Basic
• Moderate
• High
• Very High

Test Coverage Impact

• My changes affect low-coverage areas (SecurityLevelWidget, RadarChart, CostEstimation, useCIAOptions)
• I've added tests to improve coverage
• N/A - Only modifying high-coverage areas

Testing Performed

• Unit tests added/updated
• Integration tests added/updated
• Manual testing completed
• Security validation performed

Screenshots/Examples

README.md Performance Section:

## ⚡ Performance & Optimization

[![Performance Testing](badge)](docs/performance-testing.md)
[![Bundle Size ~201KB (gzip)](badge)](docs/performance-testing.md)
[![Lighthouse Run Audit](badge)](actions/workflows/lighthouse-performance.yml)

- Total Bundle: ~201 KB (gzip) ✅ (Target: <500 KB)
- JavaScript: ~188 KB (gzip) ⚠️ (Target: <180 KB - optimization recommended)
- Stylesheets: ~13 KB (gzip) ✅ (Target: <50 KB)

Bundle Analysis:

├── index.html               1.31 KB  (gzip: 0.55 KB)
├── CSS Assets              69.80 KB  (gzip: 12.55 KB)
├── JavaScript Assets:
│   ├── index.js           270.06 KB  (gzip: 55.77 KB)
│   ├── vendor.js          210.35 KB  (gzip: 72.21 KB)
│   ├── react.js           188.92 KB  (gzip: 59.07 KB)
│   └── dataProviders.js     4.48 KB  (gzip: 1.31 KB)
└── Total Bundle          ~743.92 KB  (gzip: ~201.46 KB)

Related Issues

Closes #614

Checklist

• My PR title follows the conventional commit format (e.g., feat: add new feature)
• Code follows project coding standards
• Tests are passing
• Documentation has been updated (if applicable)
• Security compliance is maintained or improved
• Changes have been reviewed for performance impact
• Breaking changes are documented (if any)

Additional Notes

Compliance Alignment:

• ISO 27001 (A.8.32, A.12.1.3): Capacity management documented
• NIST CSF (ID.AM-1, PR.IP-2): Asset performance characteristics documented
• CIS Controls (16.12, 16.13): Application security and monitoring documented
• Hack23 ISMS Policy §8: Performance testing framework complete

Documentation includes:

• Lighthouse audit configuration (90+ targets)
• Performance budget enforcement (budget.json)
• Testing procedures (CI, local, E2E, DevTools)
• Mermaid workflow diagram
• Widget benchmarks (<500ms targets)
• Optimization best practices
• Regression prevention strategy

No code changes. Documentation only.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>⚡ Create performance-testing.md Documentation for Performance Validation</issue_title>
<issue_description>## 🎯 Objective

Create performance-testing.md documentation to align with Hack23 ISMS Secure Development Policy requirements for performance validation and monitoring framework.

📋 Background

Per Secure_Development_Policy.md §8 "Performance Testing & Monitoring Framework", all Hack23 projects MUST document performance testing with benchmarks, Lighthouse audits, load testing, and performance budgets.

Current State:

• ❌ Missing performance-testing.md (referenced in policy examples)
• ✅ Lighthouse performance workflow: .github/workflows/lighthouse-performance.yml
• ✅ Performance budget defined in budget.json
• ⚠️ Performance testing undocumented (no centralized metrics)
• ⚠️ No public performance benchmarks or analysis

Reference Implementations:

• 🎮 Black Trigram performance-testing.md - Comprehensive benchmarks
• 📊 Policy §8.2 requires: Lighthouse audits, load testing, performance budgets, real user monitoring, regression prevention

Why This Matters:

• ISO 27001 (A.8.32): Capacity management
• NIST CSF (ID.AM-1): Asset performance characteristics
• CIS Controls (16.12): Application security through performance
• User Experience: Fast, responsive application
• Operational Excellence: Performance monitoring and optimization

✅ Acceptance Criteria

• Create docs/performance-testing.md following ISMS style guide
• Document Lighthouse audit configuration and thresholds
• Include current Lighthouse scores (Performance, Accessibility, Best Practices, SEO)
• Document performance budget from budget.json (bundle size limits)
• Define page load time benchmarks and targets
• Document performance testing procedures (Lighthouse, browser DevTools)
• Include performance optimization best practices
• Add performance regression prevention strategy
• Link to live Lighthouse reports (if available)
• Document performance monitoring approach
• Include Mermaid diagram of performance testing workflow
• Add document control footer with owner, version, review cycle

🛠️ Implementation Guidance

Files to Create/Modify

• docs/performance-testing.md - New comprehensive performance testing documentation
• README.md - Add performance badge linking to documentation (optional)

Approach

1. Review existing performance infrastructure:

# Check Lighthouse workflow
cat .github/workflows/lighthouse-performance.yml

# Review performance budget
cat budget.json

# Check package.json for performance scripts
grep -E "lighthouse|performance|perf" package.json

2. Create performance-testing.md structure:

# ⚡ CIA Compliance Manager — Performance Testing & Benchmarks

## 🎯 Purpose & Scope
Document comprehensive performance testing strategy, benchmarks, and optimization practices for the CIA Compliance Manager application to ensure optimal user experience and operational efficiency.

## 📊 Performance Standards

### Lighthouse Audit Targets
- **Performance:** Score 90+ (currently: TBD)
- **Accessibility:** Score 95+ (currently: TBD)
- **Best Practices:** Score 95+ (currently: TBD)
- **SEO:** Score 95+ (currently: TBD)

### Page Load Time Targets
- **Initial Load:** <2 seconds (Target for GitHub Pages deployment)
- **Widget Rendering:** <500ms per widget
- **Chart Rendering:** <1 second (Chart.js radar charts)
- **User Interactions:** <200ms response time

### Performance Budget
Based on `budget.json`:
\`\`\`json
{
  "budgets": [
    {
      "path": "/*",
      "timings": [
        { "metric": "interactive", "budget": 3000 },
        { "metric": "first-meaningful-paint", "budget": 2000 }
      ],
      "resourceSizes": [
        { "resourceType": "script", "budget": 500 },
        { "resourceType": "total", "budget": 1000 }
      ]
    }
  ]
}
\`\`\`

## 🧪 Performance Testing Procedures

### Lighthouse Audit Execution
\`\`\`bash
# Local testing
npm install -g lighthouse
lighthouse https://hack23.github.io/cia-compliance-manager/ --view

# CI testing
# Automated via .github/workflows/lighthouse-performance.yml
\`\`\`

### Browser DevTools Profiling
1. Open Chrome DevTools (F12)
2. Navigate to Performance tab
3. Start recording
4. Perform user actions (select security levels, view widgets)
5. Stop recording and analyze:
   - JavaScript execution time
   - Rendering time
   - Layout shifts
   - Memory usage

### Bundle Analysis
\`\`\`bash
# Analyze bundle size
npm run build
du -sh dist/

# Check for optimization opportunities
npm run analyze # (if configured)
\`\`\`

## 📈 Performance Benchmarks

### Current Metrics (as of [date])
- **Bundle Size:** [X] KB (Target: <1000 KB)
- **JavaScript Size:** [X] KB (Target: <500 KB)
- **Initial Load:** [X]s...

</details>


> **Custom agent used: hack23-security-architect**
> Expert in security hardening, vulnerability remediation, threat mitigation, and implementing security controls across cloud and application architectures

- Fixes Hack23/cia-compliance-manager#588

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[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Scanned Files

None