ui: add toggle to show/hide input nodes in graph view

[Smitaambiger]

Summary

Adds a UI toggle to show or hide input nodes in the Graph View.

Changes

• Introduced a Show Inputs checkbox in the graph view
• Conditionally renders input nodes and their edges based on toggle state
• Graph layout updates correctly when toggling

How I tested this

• Ran the UI locally
• Verified input nodes appear when toggle is enabled
• Verified input nodes and edges are hidden when toggle is disabled
• Confirmed graph layout updates correctly

Screenshots

Inputs ON

Inputs OFF

Related Issue

#415