- Added `ProgressionChainEditor` to the Exercise Progression Graph Panel for improved management of exercise chains.
- Refactored state management to utilize `useRef` for chain editor references and removed unused sequence step logic.
- Introduced a path insert notice in the Exercise Progression Path Builder to inform users about unsaved changes.
- Updated UI elements to enhance clarity regarding the status of paths before saving.
- Incremented application version to reflect these updates.
