Update CHANGELOG for v1.0.0 release

Comprehensive changelog for initial stable release including:
- All core features organized by category
- Recent improvements and enhancements
- Technical details and known limitations

Author: jonmartin721

CHANGELOG.md

@@ -7,53 +7,136 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [1.0.0] - 2025-11-18
 
-### Added
+**Initial stable release** of GitHub Devwatch - A Chrome extension for monitoring GitHub repository activity across multiple repos with real-time notifications.
+
+### Core Features
+
+**Repository Monitoring**
 - Multi-repository monitoring with GitHub API integration
-- Browser notifications for new PRs, issues, and releases
-- Badge counter on extension icon showing unread activity count
-- Activity filtering by type (PRs, Issues, Releases)
-- Configurable check intervals (5, 15, 30, 60 minutes)
-- Search functionality for filtering activities
-- Archive view for viewing read activities
-- Repository mute and snooze controls for managing notifications
-- Collapsible repository sections in activity list
-- Bulk import for watched, starred, and participating repositories
-- Settings backup and restore functionality
+- Support for watching unlimited repositories (within GitHub API rate limits)
+- Parallel repository fetching for improved performance
+- Automatic activity polling with configurable intervals (5, 15, 30, 60 minutes)
+- Activity filtering by type (Pull Requests, Issues, Releases)
+- Real-time badge counter showing unread activity count
+- Browser notifications for new activity (configurable per-repo)
+- Repository pinning to keep important repos at the top
+- Repository mute and snooze controls for temporary notification silencing
+- Optional mark-as-read when snoozing repositories
+- Bulk import from GitHub (watched, starred, and participating repos)
+
+**User Interface**
+- Clean, modern popup interface with activity feed
+- Collapsible repository sections for better organization
+- Search and filter functionality for activities
+- Archive view for viewing previously read activities
+- Onboarding wizard for first-time setup
 - Dark mode, light mode, and system theme support
-- Notification toggle for browser notifications
-- Offline support with cached activity data
-- Accessibility features including keyboard navigation and ARIA labels
-- Security hardening with XSS protection and input sanitization
-- Content Security Policy implementation
-- Modern UI with hover effects and visual feedback
-- Shared utility modules for better code organization
-- Comprehensive test suite with Jest
-- GitHub Actions CI/CD pipeline
-- ESLint and Prettier configuration
-- Build validation script
-
-### Changed
-- Renamed extension to "GitHub Devwatch"
-- Updated extension icon to git branch design
-- Redesigned settings page with modern tabbed UI
-- Refactored code into modular shared utilities
-- Switched to SVG icons throughout the UI
-- Moved toast notifications to bottom-right corner
-- Replaced mute toggle with eye icon for better UX
-- Improved import UI with better visual hierarchy
-
-### Fixed
-- Jest configuration and test syntax errors
-- ESLint errors in build scripts
-- Module exports and imports
-- Unused imports cleaned up
-- Test suite re-enabled for accessibility tests
-
-### Security
+- Responsive design with mobile-friendly layout
+- Custom scrollbar styling for better aesthetics
+- Toast notifications for user feedback
+- Keyboard navigation support throughout the UI
+
+**Settings & Configuration**
+- Redesigned options page with tabbed navigation (Setup, Repositories, Settings, Help)
+- Token input integrated into setup wizard
+- Repository management with visual cards and action buttons
+- Activity type filters (enable/disable PRs, Issues, Releases)
+- Configurable item expiry (auto-hide old activities)
+- Settings backup and restore functionality
+- GitHub token import from multiple sources
+- Enhanced help documentation with changelog viewer
+
+**Security & Privacy**
+- AES-256 encrypted token storage with session caching
+- Automatic token migration from unencrypted to encrypted storage
+- Content Security Policy to prevent script injection
 - XSS protection through input sanitization
 - URL validation to prevent malicious redirects
-- Content Security Policy to prevent script injection
-- Secure token storage using Chrome's local storage
+- Repository name validation against GitHub's format
+- No third-party services or analytics
+- All data stored locally on user's device
+
+**Developer Experience**
+- MVC architecture with modular code organization
+- Shared utility modules for better maintainability
+- Comprehensive test suite with Jest (316+ tests)
+- GitHub Actions CI/CD pipeline with automated testing
+- Codecov integration for test coverage tracking
+- Automated CHANGELOG validation before releases
+- Dependabot for automated dependency updates
+- ESLint and Prettier for code quality
+- Pre-commit hooks for linting
+- Pre-push validation (lint, typecheck, test, build)
+- Build validation script for extension packaging
+- Chrome extension packaging script
+
+**Accessibility**
+- WCAG 2.1 Level A compliance
+- Full keyboard navigation support
+- ARIA labels and roles throughout the UI
+- Screen reader friendly error messages
+- Focus indicators for interactive elements
+- Semantic HTML structure
+
+### Recent Improvements
+
+**Project Governance**
+- Added CODE_OF_CONDUCT.md for contributor guidelines
+- Added SECURITY.md with vulnerability reporting process and security measures
+
+**CI/CD Enhancements**
+- Integrated Codecov for automated test coverage tracking
+- Added CHANGELOG validation in release workflow (blocks releases without changelog entries)
+- Enabled Dependabot for npm and GitHub Actions dependencies
+- Weekly dependency update schedule with grouped minor/patch updates
+- Added pre-commit hook for linting
+
+**Documentation Updates**
+- Updated README with AES-256 encryption details and Codecov badge
+- Updated PRIVACY.md to reflect encrypted token storage
+- Added comprehensive release process documentation to CONTRIBUTING.md
+- Included version guidelines and CHANGELOG requirements for maintainers
+
+**Code Quality**
+- Removed debug console.log statements across codebase
+- Cleaned up unused imports and variables
+- Fixed badge count to respect item expiry settings
+- Made updateLastUpdated async and use actual lastCheck timestamp
+- Various bug fixes and performance improvements
+
+**UI/UX Improvements**
+- Redesigned options page with improved visual hierarchy
+- Moved token input into primary setup step card
+- Added repository section cards with icons and count badges
+- Improved mobile responsiveness throughout settings
+- Added changelog viewer to help section
+- Enhanced scrollbar styling in popup
+- Added hover effects and animations for better feedback
+
+**Testing**
+- Added test coverage for activity-item-view component
+- Added test coverage for repository-validator
+- Updated and improved existing test suites
+- Achieved 58% overall test coverage
+
+### Technical Details
+
+- **Manifest Version:** 3 (Chrome Extension Manifest V3)
+- **Framework:** Vanilla JavaScript (no external dependencies for core functionality)
+- **Architecture:** Model-View-Controller (MVC) pattern
+- **Storage:** Chrome Storage API (sync for settings, local for activity data)
+- **API:** GitHub REST API v3
+- **Testing:** Jest with jsdom
+- **Build Tools:** Node.js build scripts
+- **Supported Browsers:** Chrome, Edge, and other Chromium-based browsers
+
+### Known Limitations
+
+- GitHub API rate limit: 5,000 requests/hour for authenticated users
+- Extension uses ~1-3 API requests per repository per check
+- Recommended check interval: 15+ minutes for multiple repos
+- Maximum sync storage: 100KB (used for settings)
+- Maximum local storage: 5MB+ (used for activity history)
 
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