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Preserve inner_error_type and blocks_errors when serializing exceptions across the WebRTC worker process boundary, enabling detailed error display in the frontend.
…de snippets - Add BlockTraceback model with traceback, error_line, and code_snippet fields - Create PythonBlockError class to capture structured error context - Generate clean tracebacks showing only user code with adjusted line numbers - Extract code snippets around error line with >>> markers - Filter out internal workflow engine frames from traceback display - Update WorkflowBlockError and StepExecutionError to use block_traceback field
…nses - Add PythonBlockError for both syntax and runtime errors in Python blocks (before it was a DynamicBlockError) - Add PythonBlockError handler in error_handlers.py returning WorkflowErrorResponse with blocks_errors for consistent frontend display; unified all cases i found. - Capture stdout/stderr for both local and Modal Python block execution Syntax errors (1 = 1), import errors, and runtime errors (1 / 0) now show consistently in the frontend with code snippets and structured block error details.
…layering - Fix inconsistent property_name - Move PythonBlockError to errors.py - Clean up inconsistencies
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