- Introduced validation utilities in src/thechart/validation with InputValidator class for various data types.
- Migrated theme management to thechart.ui.theme_manager, providing a legacy shim for backward compatibility.
- Updated tooltip system to thechart.ui.tooltip_system, maintaining legacy imports.
- Created compatibility shim for undo utilities, redirecting to thechart.core.undo_manager.
- Ensured all new modules are properly documented and maintain existing functionality.
- Introduced `quick_test.py` for running specific test categories (unit, integration, theme, all).
- Updated `run_tests.py` to improve test execution and reporting, including coverage.
- Removed outdated test scripts for keyboard shortcuts, menu theming, note saving, and entry updating.
- Added new test script `test_theme_changing.py` to verify theme changing functionality.
- Consolidated integration tests into `test_integration.py` for comprehensive testing of TheChart application.
- Updated theme manager to ensure color retrieval works correctly.
- Modified test constants to import from the correct module path.
- Introduced `ThemeManager` to handle application themes using `ttkthemes`.
- Added `SettingsWindow` for user preferences including theme selection and UI settings.
- Integrated theme selection into the main application with a menu for quick access.
- Enhanced UI components with custom styles based on the selected theme.
- Implemented tooltips for better user guidance across various UI elements.
- Updated dependencies to include `ttkthemes` for improved visual appeal.
William Valentin