Stylize the sharing indicator

<img width="446" alt="Image" src="https://github.com/user-attachments/assets/ed4fffcd-4af3-4cc2-88d6-4bc190226f47" />

`webrtcIndicator`

<img width="344" alt="Image" src="https://github.com/user-attachments/assets/d1474eae-1c99-47f9-8567-244ac09c86e7" />