Record visualisation sessions for all existing DSAs

- Add a "Run and record" or similar button next to the "Run" button

<img width="1512" height="820" alt="Image" src="https://github.com/user-attachments/assets/3ba98fc0-8919-4cd5-9626-7f93aa0fb24c" />
- When a user presses "Record", the visualisation session is recorded as a mp4 video and gets saved to the user's browser 