Show agent turn errors

[roprgm]

This pull request enhances error handling and display for failed "turns" in the application. It introduces a TraceError type, updates the event and state models to capture error details, and adds a UI component to surface error messages to users. The most important changes are grouped below:

Error Handling and Data Model Updates:

• Added a TraceError type to src/trace/types.ts and included it as an optional error field on the Turn type to standardize error information for failed turns. [1] [2]
• Updated the turn.failed event in src/trace/events.ts to include error details (code, message, and optional details) by extending the event data with TraceError.
• Modified the projector logic in src/trace/projector.ts to record error details on the Turn object when a turn fails.

UI Improvements:

• Added a TurnError component to src/components/turn.tsx to display error messages and codes for failed turns, and updated the Turn component to render this error information when present. [1] [2]
• Imported the CircleAlert icon in src/components/turn.tsx for visual indication of errors in the UI.

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Project	Deployment	Actions	Updated (UTC)
eve-devtools	Ready	Preview, Comment	Jul 13, 2026 6:07am