- Introduced a new i18n module for managing translations using JSON files.
- Added English (en.json) and French (fr.json) translation files for UI elements.
- Implemented lazy initialization of the translator to load translations on demand.
- Added unit tests for translation lookup, fallback behavior, and available languages detection.
- Implement tests for ConfigValidator to ensure proper validation of configuration settings, including valid configurations, required fields, type checks, and error handling.
- Create tests for ConfigProfile to verify profile management functionalities such as saving, loading, listing, and deleting profiles.
- Add tests for ConfigExporter to validate JSON export and import processes, including error handling for non-existent files and invalid JSON.
- Introduce tests for SettingsDialog to confirm proper initialization, tab existence, and configuration data retrieval and application.
