Implement Excel parsing module for ERP exported files following TDD principles.
Key features:
- Parse Excel files with multiple orders per file
- Extract order header information (production order, product code, etc.)
- Extract material data rows with 13 fields
- Handle empty orders gracefully
- Detect footer rows (制单人/打印人)
- Map Chinese field names to English property names
- Support field name mapping from Python reference
Implementation:
- ExcelParser class with parse() method
- DiscreteMaterialPlan and ExcelParseOptions types
- OrderHeader interface for order metadata
- Test fixtures with realistic Excel structure
- Comprehensive unit tests (3 tests, all passing)
Reference: playwrite/utils/excel_converter.py
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
