Draft: redesign of ui

This merge request enhances the Audio Contributions section and updates the Documentation viewing experience in the corpus module to improve overall UI clarity and usability. The audio interface has been redesigned into a responsive grid layout with clear thumbnails, titles, metadata, and play indicators, removing excessive empty space and ensuring a clean, mobile-friendly presentation. Additionally, documentation files no longer open in a new browser tab; instead, they are displayed within an in-app modal or embedded viewer, providing a smoother and uninterrupted user experience.