add name and message to frontendend exception handler

[adhami3310]

No description provided.

[greptile-apps]

Greptile Summary

This PR improves frontend error handling by adding more detailed error information throughout the error handling chain. The changes ensure that error name and message are included alongside stack traces, providing better context for debugging. Key changes include:

• Modified handle_frontend_exception in state.py to accept fuller error information
• Enhanced JavaScript error handlers in state.js to send error name and message
• Updated error boundary component to display and handle the expanded error format

These changes create a more consistent and informative error reporting system across the frontend-backend boundary, making it easier for developers to diagnose and fix issues.

Confidence score: 5/5

1. This PR is very safe to merge as it purely enhances error reporting without modifying core functionality
2. The changes are well-coordinated across all relevant files and follow a consistent pattern of improvement
3. While all files look good, developers might want to double-check the error formatting in error_boundary.py to ensure the display format meets their expectations

_{3 files reviewed, no comments
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[codspeed-hq]

CodSpeed Performance Report

Merging #5585 will not alter performance

_{Comparing add-name-and-message-to-frontendend-exception-handler (a6e6eb6) with main (d324b25)}

Summary

✅ 8 untouched benchmarks

[masenf]

makes sense, approve when unit tests are fixed up