Fixes #1107 infinite re-render loop in model edit page

[ddjain]

Problem

When clicking the edit (pencil) icon on a model in the Models page, the UI enters an infinite loop causing:
• Continuous page refreshing
• Infinite API calls to /models/new?edit=true&name=...
• Unusable interface

Root Cause

The useEffect hook in ui/src/app/models/new/page.tsx had isLoading in its dependency array. Since the effect calls setIsLoading(true), it triggers itself repeatedly.

Solution

• Removed isLoading from the useEffect dependency array
• Simplified loading state logic by removing conditional check

Changes

• Modified ui/src/app/models/new/page.tsx line 206
• Effect now only runs when actual dependencies change (edit mode, model name, providers, etc.)

Testing

• Edit model functionality now loads once and remains stable
• No more infinite API calls or page refreshing
• Model data loads correctly for editing

Fixes #1107 described in the bug report where editing models caused infinite loops.

[peterj]

thanks! make sure you sign the DCO