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>

config/config.ini

@@ -0,0 +1,40 @@
+[API]
+api_key =
+secret_key =
+timeout = 30
+max_retries = 3
+retry_delay = 2
+api_url = https://aip.baidubce.com/rest/2.0/ocr/v1/table
+token_url = https://aip.baidubce.com/oauth/2.0/token
+form_ocr_url = https://aip.baidubce.com/rest/2.0/solution/v1/form_ocr/get_request_result
+
+[Paths]
+input_folder = data/input
+output_folder = data/output
+temp_folder = data/temp
+template_folder = templates
+template_file = 银豹-采购单模板.xls
+processed_record = data/processed_files.json
+data_dir = data
+product_db = data/product_cache.db
+
+[Performance]
+max_workers = 4
+batch_size = 5
+skip_existing = true
+
+[File]
+allowed_extensions = .jpg,.jpeg,.png,.bmp
+excel_extension = .xlsx
+max_file_size_mb = 4
+
+[Templates]
+purchase_order = 银豹-采购单模板.xls
+item_data = 商品资料.xlsx
+
+[Gitea]
+base_url = https://gitea.94kan.cn
+owner = houhuan
+repo = yixuan-sync-data
+token =
+