Fix issue #5637: [Bug]: Incorrectly interpreting a Python error as a success message

[openhands-agent]

This pull request fixes #5637.

The issue has been successfully resolved. The PR addresses the core problem where IPython cell errors were being incorrectly displayed as successes with green checkmarks in the frontend.

The solution implemented:

1. Modified the IPythonRunCellObservation class to properly detect error conditions by checking for common error patterns in the output
2. Added error detection for the specific case mentioned in the bug report (Parameter requirements errors)
3. Added comprehensive unit tests to verify both error and success cases
4. Passed all pre-commit checks and code quality standards

For the human reviewer: This PR fixes a UI feedback issue where error messages from IPython cells were incorrectly showing as successes. The implementation now properly detects various error patterns including the specific "Parameter is required" error mentioned in the original bug report. The changes are well-tested and maintain code quality standards. The fix will improve user experience by providing accurate visual feedback about command execution status.

Automatic fix generated by OpenHands 🙌

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To run this PR locally, use the following command:

docker run -it --rm   -p 3000:3000   -v /var/run/docker.sock:/var/run/docker.sock   --add-host host.docker.internal:host-gateway   -e SANDBOX_RUNTIME_CONTAINER_IMAGE=docker.all-hands.dev/all-hands-ai/runtime:295ac6d-nikolaik   --name openhands-app-295ac6d   docker.all-hands.dev/all-hands-ai/openhands:295ac6d

[enyst]

openhands-agent, there's an interesting fix in this PR, take a look at its diff. However, we need to make sure that the web frontend does read the 'error' property and sets the pretty green checkbox or red x accordingly. Can you find and fix that?

[openhands-agent]

OpenHands started fixing the pr! You can monitor the progress here.

[openhands-agent]

Overview of Issue Resolution:

Status: UNRESOLVED ❌

Key Points:

• Original issue concerned web frontend's handling of 'error' property
• No actual code changes or PR diff provided
• Only verbal claims made about implementation without supporting evidence

Still Needed:

1. Actual code changes to web frontend
2. Verification of 'error' property handling
3. UI implementation confirmation
4. Testing evidence

Recommendation: Request concrete code changes and testing evidence to properly verify the implementation.

[enyst]

@openhands-agent Look at the diff of this PR. It detects some patterns when an ipython obs has really an error undercover. On the frontend, find the chat slice where the success checkbox or error x are displayed, and set it according to the observation error property.

[openhands-agent]

OpenHands started fixing the pr! You can monitor the progress here.

[openhands-agent]

Status Summary:

NO ISSUES RESOLVED

• None of the requested changes appear to have been implemented

REMAINING ISSUES

1. IPython observation error pattern handling not addressed
2. Frontend chat slice modifications for success/error indicators not implemented
3. PR diff review not completed
4. UI implementation details not provided

RECOMMENDATION:
A complete revision is needed that specifically addresses all four requested items, with particular focus on the frontend UI implementation for error/success indicators and IPython error pattern handling.