This commit includes several enhancements across multiple files:
- In `valerie-ui.scss`, improved formatting of CSS properties and adjusted selectors for better readability and consistency.
- In `CreateListModal.vue`, introduced a sentinel value for group selection and refined the logic for handling group options.
- In `VModal.vue`, streamlined modal structure and removed unnecessary styles, centralizing modal styling in `valerie-ui.scss`.
- In `VTextarea.vue`, adjusted aria attributes for better accessibility and improved code clarity.
- Updated `api-config.ts` to switch the API base URL to a local development environment.
These changes aim to enhance maintainability, accessibility, and overall user experience.
