feat: Phase 3 - Integration Tests & Production Deployment Guide (#219)

[kevalyq]

📦 Closes Issue

Resolves #219
Part of Epic #217

📝 Summary

Completes Phase 3 of Epic #217 (httpOnly Cookie Authentication Migration) with comprehensive integration tests and production deployment guide.

Key Deliverables

1. Integration Tests (8 tests, 27 assertions)

   • CORS credentials and preflight request validation
   • Concurrent device session management
   • Session configuration and performance tests
   • Hybrid authentication support (Cookie + Bearer token)

2. Production Deployment Guide (600+ lines)

   • Complete security checklist with HTTPS/TLS requirements
   • Nginx and Apache configurations with rate limiting
   • Environment templates for production
   • Hybrid authentication setup for Web (cookies) and Mobile (tokens)
   • Health checks, monitoring, backup/rollback procedures
   • Security incident response guidelines

3. Documentation Updates

   • CHANGELOG.md updated with Phase 3: Integration Testing & Documentation #219 completion
   • Formatting improvements in sanctum-spa-auth.md

🧪 Testing

Test Results

✅ All 488 tests passing (1487 assertions)
✅ PHPStan Level Max: 0 errors
✅ Laravel Pint: 0 violations
✅ REUSE Compliance: ✅
✅ Markdownlint: 0 errors

New Tests Added

• tests/Feature/Auth/SanctumIntegrationTest.php
  • CORS and security tests
  • Session performance tests
  • Token expiration tests

📊 Design Decisions

Hybrid Authentication Strategy

Question: Should we switch completely to cookie-based auth?

Answer: NO - Keep hybrid approach (already implemented correctly)

Strategy Matrix

┌─────────────────────────────────────────────────┐
│ Client Type              │ Auth Method          │
├─────────────────────────────────────────────────┤
│ Web SPA (Vite)           │ httpOnly Cookies ✅  │
│ PWA (Browser)            │ httpOnly Cookies ✅  │
│ Android App (Native)     │ Bearer Token ✅      │
│ iOS App (Native)         │ Bearer Token ✅      │
│ Desktop App (Tauri)      │ Bearer Token ✅      │
│ CLI / Scripts            │ Bearer Token ✅      │
└─────────────────────────────────────────────────┘

Rationale:

• ✅ Web/PWA: httpOnly cookies = XSS protection
• ✅ Native Apps: Bearer tokens = simpler, no CORS
• ✅ Laravel Sanctum: Built for this pattern
• ✅ Future-proof: Android app can use tokens immediately

🔍 Self-Review Checklist

• All tests pass locally
• PHPStan analysis passes (level max)
• Code style passes (Pint)
• REUSE compliance passes
• Markdown linting passes
• Commits follow conventional commit format
• No debug code (dd, dump, var_dump)
• No unused imports
• Documentation is accurate
• CHANGELOG updated

📚 Related Issues

• Closes Phase 3: Integration Testing & Documentation #219 (Phase 3: Integration Tests & Documentation)
• Part of Epic [EPIC] httpOnly Cookie Authentication Migration #217 (httpOnly Cookie Authentication Migration)
• Related: [EPIC] Migrate to httpOnly Cookie Authentication frontend#205 (Frontend Epic - ready to start)

🎯 Next Steps

Frontend implementation can now proceed:

• frontend#224: CSRF Token Integration
• frontend#225: AuthContext Migration
• frontend#226: Frontend Integration Tests

---

Epic Status: Backend 100% Complete ✅
Frontend: Ready to Start 🚀

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!

[Copilot]

Pull request overview

This PR completes Phase 3 of the httpOnly Cookie Authentication Migration epic (#217) by adding comprehensive integration tests and a production deployment guide. The deliverables include 8 integration tests covering CORS, session management, and hybrid authentication scenarios, plus a detailed 620-line production deployment guide with security checklists, server configurations, and troubleshooting procedures.

Key Changes:

• Added integration tests for Sanctum authentication covering CORS credentials, concurrent device sessions, and session configuration validation
• Created comprehensive production deployment guide with Nginx/Apache configurations, environment templates, and security best practices
• Updated CHANGELOG with Phase 3 completion details

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 5 comments.

File	Description
tests/Feature/Auth/SanctumIntegrationTest.php	New integration tests for CORS, session performance, concurrent devices, and token configuration
docs/guides/production-deployment.md	Complete production deployment guide with security checklist, server configs, and troubleshooting
CHANGELOG.md	Added entries for Phase 3 completion with integration tests and deployment guide