Added a new animation for the "开始通话" button on the mobile call page, providing a visual ripple effect to improve user experience. Adjusted layout for better clarity and responsiveness.
- Introduce a new utility class `.scrollbar-subtle` in `globals.css` for a refined scrollbar appearance.
- Update `AssistantPage` to apply the subtle scrollbar styling to overflow containers, enhancing the user interface.
- Reset message state and sequence in `useVoicePreview` hook upon resource release, ensuring clean state management.
Xin Wang