- Implemented `test_path_validation.py` to test filename sanitization, path sanitization, and export path validation functions.
- Added comprehensive test cases for various problematic block names and paths to ensure proper handling of invalid characters and whitespace.
- Created `test_sanitization.py` to specifically address problematic block names with updated sanitization logic, including special cases for "I/O access error" and "Time error interrupt".
- Enhanced filename sanitization to replace specific problematic characters and patterns, ensuring consistent output for known issues.
