✨ Added

Sprint 10 - Production Release MAJOR

• Installer Images: Automated SD card image builder with pi-gen integration for one-click deployment
• First-Boot Wizard: Web-based provisioning wizard with QR code auto-enrollment
• Multi-Language Support: Complete translations in English, isiZulu, Sepedi, and French
• Monitoring Stack: Prometheus + Grafana dashboards for comprehensive system and fleet metrics
• AppArmor Security: Hardened container profiles for all services with strict access control
• File Integrity Checking: Hash-based verification of critical system components
• TLS Enforcement: Mandatory HTTPS for all admin dashboard access with automatic certificate management
• Fleet Management: Device templates and deployment groups for efficient mass rollouts
• Mass Deployment Tools: Bulk enrollment and parallel deployment scripts supporting 100-500 devices
• Release Artifacts: Version metadata, firmware bundles, and automated release build pipeline

Sprint 9 - Kiosk Mode & Qt UI Shell

• Qt Quick UI Shell: Native kiosk interface built with Qt Quick for optimal performance
• Full-Screen Kiosk Mode: Dedicated kiosk experience with touch screen support
• Educational Content Interface: Intuitive content delivery system for students and teachers
• Network Diagnostics: Real-time network status display with troubleshooting tools
• User Authentication: Secure session management with automatic logout

Sprint 8 - Content Delivery

• Content Management System: Comprehensive CMS for educational materials and digital resources
• Content Assignment: Flexible content distribution to specific device groups and schools
• Bandwidth Optimization: Efficient content sync with compression and delta updates
• Offline Content Caching: Intelligent local caching for zero-latency content access
• Version Tracking: Complete content version history with rollback capability

Sprint 7 - OTA Updates

• Over-the-Air Updates: Zero-touch update system with staged rollouts
• Update Channels: Multiple channels (stable, beta, dev, nightly) for controlled releases
• Automatic Rollback: Self-healing rollback on failed updates
• Update Scheduling: Bandwidth-aware scheduling with off-peak deployment
• Status Tracking: Real-time update progress monitoring across entire fleet

Sprint 6 - Backup & Restore

• Automated Backups: Scheduled PostgreSQL backups with configurable retention
• Incremental Backups: Full and incremental backup support for storage efficiency
• Point-in-Time Recovery: Restore to any previous state with transaction precision
• Backup Encryption: AES-256 encryption and compression for secure storage
• Remote Storage: Cloud and USB backup targets with automatic sync

Sprint 5 - Enhanced UI & API

• Modernized Dashboard: Complete UI refresh with Material-UI components
• Real-Time Monitoring: Live device status and performance metrics
• Advanced Filtering: Powerful search and filter capabilities for large fleets
• API Client SDK: JavaScript SDK for third-party integrations
• Responsive Design: Mobile-first design for administration on any device

Sprint 4 - API Gateway & Security

• API Gateway: Centralized gateway with rate limiting and request validation
• JWT Authentication: Secure token-based authentication system
• Role-Based Access Control: Granular RBAC with admin, teacher, and viewer roles
• API Documentation: Interactive OpenAPI/Swagger documentation
• Security Headers: CORS, CSP, and security header enforcement

Sprint 3 - Device Enrollment & CDC

• Automated Enrollment: One-click device enrollment workflow with QR codes
• Change Data Capture: Real-time PostgreSQL CDC for instant data sync
• Health Monitoring: Continuous device health checks with automated alerts
• Database Triggers: Automated workflows triggered by data changes
• Device Grouping: Flexible organization by location, type, and custom attributes

Sprint 2 - Sync Engine

• Bidirectional Sync: Two-way synchronization between edge and cloud
• Conflict Resolution: Intelligent last-write-wins strategy with merge capabilities
• Queue Management: Persistent sync queue with exponential backoff retry
• Network Resilience: Automatic resume after network interruptions
• Performance Metrics: Detailed sync statistics and performance monitoring

Sprint 1 - Foundation

• PostgreSQL Database: Production-ready database with Docker Compose orchestration
• Express.js API: RESTful API server with comprehensive endpoint coverage
• Redis Cache: In-memory caching for sub-50ms query performance
• Docker Infrastructure: Containerized architecture for easy deployment
• Development Tools: VS Code workspace, ESLint, Prettier configuration

🔧 Changed

• Database Schema: Optimized indexes for 10x faster queries on device tables
• API Responses: Standardized response format across all endpoints
• Docker Images: Multi-stage builds reducing image size by 60%
• Configuration: Environment-based config replacing hardcoded values

🐛 Fixed

• Memory Leaks: Resolved PostgreSQL connection pool leaks in long-running processes
• Sync Conflicts: Improved conflict resolution for simultaneous updates
• Wi-Fi Hotspot: Fixed hostapd configuration on Raspberry Pi OS Bookworm
• Dashboard Performance: Optimized React re-renders reducing CPU usage by 40%
• OTA Updates: Fixed rollback mechanism for partial update failures

🔒 Security

• SQL Injection: Parameterized queries across all database operations
• XSS Protection: Input sanitization and Content Security Policy enforcement
• Password Storage: Bcrypt hashing with adaptive cost factor
• API Security: Rate limiting, request validation, and HTTPS enforcement
• Dependency Updates: All npm packages updated to latest secure versions

✨ Added

• Beta Release: First public beta with core features complete
• Fleet Dashboard: Initial fleet management interface
• Content Sync: Basic content synchronization system

🐛 Fixed

• Networking: Resolved DNS issues on Pi
• Database: Fixed connection timeout errors

✨ Added

• Alpha Release: Internal alpha testing version
• Basic UI: Simple admin dashboard
• Device Management: Manual device registration