- Added new CSS styles for the planning unit editor to manage scrolling and layout, ensuring a responsive design.
- Updated the TrainingUnitFormShell component to include new class names for better styling and structure.
- Modified the TrainingUnitEditPage to support the new layout, improving user experience when editing training units.
- Added Vitest as a testing framework and included test scripts in package.json for improved testing capabilities.
- Refactored TrainingPlanningPageRoot component by removing unused state variables and imports, streamlining the code for better readability and performance.
- Introduced new utility functions for planning routes to enhance navigation within the training planning interface.
