Add workflow node actions and side panel controls (#24411)

## Summary

- Add contextual change, duplicate, and delete actions to selected
workflow nodes using shared side-panel menu items.
- Add labeled close and expand controls while preserving layered Escape
and expand shortcuts.
- Align tertiary icon button color with secondary text.

## After

blue button issue is a main problem, not related to this branch

<img width="2046" height="924" alt="image"
src="https://github.com/user-attachments/assets/b32bea6f-81e1-4379-ad93-f9d8abf67941"
/><img width="1336" height="1004" alt="image"
src="https://github.com/user-attachments/assets/48cfc498-e6d3-4f43-9f20-fb30d026d6d7"
/>