- Introduced `TestCaseFiles` interface to manage test case files in JSON format.
- Added `load_cases` function to load test cases from JSON files in the Lua test runner.
- Implemented parameterized test helpers (`it_each`, `fit_each`, `xit_each`) for more flexible test case execution.
- Updated existing tests in `ui_login`, `ui_permissions`, `user_manager`, and `workflow_editor` to utilize JSON-based test cases for better maintainability and readability.
- Added new components and scripts for the notification center, including a summary card with severity-based notifications.
- Enhanced metadata and manifest files to include new components and scripts.
- Introduced comprehensive test cases for user actions, permission checks, and workflow statuses.
