feat: 益选 OCR 订单处理系统初始提交

- 智能供应商识别（蓉城易购/烟草/杨碧月/通用）
- 百度 OCR 表格识别集成
- 规则引擎（列映射/数据清洗/单位转换/规格推断）
- 条码映射管理与云端同步（Gitea REST API）
- 云端同步支持：条码映射、供应商配置、商品资料、采购模板
- 拖拽一键处理（图片→OCR→Excel→合并）
- 191 个单元测试
- 移除无用的模板管理功能
- 清理 IDE 产物目录

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

CHANGELOG.md

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+# Changelog
+
+## [v2.2.0] - 2026-03-31
+### Added
+- **UI Simplification**: Removed dedicated buttons for Rongcheng and Tobacco; all Excel orders now use the intelligent auto-routing.
+- **Enhanced Yang Biyue Support**: Fixed column mapping for Yang Biyue orders, ensuring standard fields (Barcode, Quantity, Price) are correctly extracted.
+- **Headless API Auto-Detect**: `headless_api.py` now automatically distinguishes between Image (OCR) and Excel (Direct) inputs based on file extension.
+
+### Fixed
+- **Yang Biyue Preprocessing**: Resolved issue where data was empty due to incorrect column renaming.
+- **Interference Filtering**: Added logic to exclude distractor columns like "Settlement Unit" or "Base Quantity" during preprocessing.
+
+### Removed
+- **Redundant Files**: Cleaned up `run.py`, `clean.py`, and unused CLI modules.
+- **Legacy UI Elements**: Removed tobacco-specific keyboard shortcuts and help entries.
+
+## [v2.1.0] - 2026-03-30
+### Added
+- **Intelligent Recognition**: Automated fingerprinting for Rongcheng Yigou, Tobacco, and Yang Biyue orders.
+- **Auto-Routing**: `OrderService.process_excel` now automatically handles preprocessing without explicit flags.
+- **Headless API Enhancements**: `headless_api.py` updated to support the new intelligent recognition mode.
+- **Comprehensive Documentation**: Added `OPENCLAW_GUIDE.md` and `FINAL_UPDATE_REPORT.md`.
+
+### Fixed
+- **Rongcheng Yigou**: Fixed barcode splitting issue where quantities were incorrectly distributed (30 to 5).
+- **Tobacco Orders**: Corrected unit price calculation (divided by 10) and quantity calculation (multiplied by 10).
+- **Identification Failure**: Fixed issue where `header=0` caused identification keywords at the very first row to be missed.
+
+## [v2.0.0] - 2026-03-25
+### Added
+- **Headless API**: First release of `headless_api.py` for OpenClaw integration.
+- **Price Validation**: Integration with PosPal item data for unit price auditing.
+- **Asynchronous Logging**: GUI now uses a queue for log output to prevent UI freezing.
+
+## [v1.1.0] - 2026-03-10
+### Added
+- **Rongcheng Yigou Support**: Initial support for Rongcheng Excel templates.
+- **Tobacco Support**: Initial support for Tobacco Excel templates.
+- **Excel Processor**: Refactored core processing logic into `ExcelProcessor`.