- Implemented dual overlay system with command-line switchable options (--overlay-type webengine/native)
- Fixed critical Qt player window close to properly exit entire application
- Restored and enhanced Ctrl+C signal handling functionality
- Added admin-only quit button to web dashboard with guaranteed force termination
- Fixed background thread management with proper daemon threads
- Resolved WebEngine JavaScript timing errors with enhanced DOM readiness checks
- Eliminated desktop transparency bleed-through issues
- Removed video controls for clean overlay-only interface
- Prevented circular dependency deadlocks in shutdown process
- Enhanced Qt threading architecture and signal integration
- Updated comprehensive documentation and changelog

Technical fixes:
- closeEvent() in Qt player now allows proper Qt shutdown sequence
- signal_handler() enhanced to detect Qt applications and use qt_app.quit()
- ThreadManager modified to set daemon=True for all background threads
- Added /api/system/shutdown endpoint with force-exit mechanism using os._exit(0)
- Enhanced aboutToQuit signal handling for proper lifecycle management
- WebEngine overlay safety improved with comprehensive error handling

- Remove 'user created successfully' alert after user creation
- Replace edit user placeholder alert with fully functional edit modal
- Add update_user() method to AuthManager with validation
- Add update_user() method to DashboardAPI class
- Add PUT /api/users/{user_id} route for user updates
- Edit modal includes form validation and error handling
- Pre-populates current user data in edit form
- Supports updating username, email, password (optional), and admin status
- Validates username/email uniqueness before saving
- Automatically refreshes user list after successful updates

User management interface is now fully functional with create, edit, and delete operations.

- Replace alert placeholders with proper fetch() calls to /api/users endpoint
- Add proper error handling for user creation and deletion
- Enhanced user list loading with error handling
- Users can now be actually created, deleted, and refreshed properly
- Form resets after successful user creation
- Modal closes automatically after successful creation

This completes the user management functionality that was showing alerts
instead of performing actual database operations.

- Fixed critical Ctrl+C signal handler - now exits gracefully with single press
- Fixed API token display issue - tokens now properly show in modal dialog after creation
- Fixed user creation and management - users now save properly and display immediately
- Fixed SQLAlchemy session binding issues causing data access errors
- Added permanent token deletion functionality (revoke now deletes completely)
- Added missing ConfigManager.update_section() method for web dashboard settings
- Enhanced frontend with professional modal dialogs and proper error handling
- Optimized shutdown process with reduced timeouts for faster exit
- Updated comprehensive documentation with troubleshooting guide
- Added detailed CHANGELOG.md documenting all improvements

Technical improvements:
- All database operations now extract data before session closure
- Enhanced signal handling flow: signal → shutdown event → cleanup → exit
- Section-based configuration management with nested support
- Improved session lifecycle management across all components
- Professional UI enhancements with Bootstrap modal integration

- Complete cross-platform multimedia client application
- PyQt5 video player with dynamic overlay templates
- Flask web dashboard with JWT authentication
- REST API client with configurable endpoints
- Multi-threaded architecture with Queue-based messaging
- SQLite database with automatic migrations
- PyInstaller build configuration for executables
- Comprehensive documentation and build scripts
- Offline-first design with local asset fallbacks