make clicking on comments open the comments sidebar and more (#6174)

make clicking on comments open the comments sidebar and add a button to
create comments into the empty state of the comments sidebar
<img width="2056" height="1081" alt="Screenshot 2026-04-23 at 12 39
50 PM"
src="https://github.com/user-attachments/assets/6f15484d-d04f-4900-92c6-b2cc397d6d08"
/>

<img width="627" height="396" alt="Screenshot 2026-04-23 at 12 40 06 PM"
src="https://github.com/user-attachments/assets/509e5526-0082-4fc6-a98f-829bb4c1baf2"
/>