实现原料逻辑删除功能

- 为fabrics表添加is_deleted字段用于标记删除状态
- 修改delete_raw方法实现逻辑删除而非物理删除
- 更新所有查询语句过滤已删除的原料数据
- 更新库存视图过滤已删除的原料和相关记录
- 保留历史数据,支持数据恢复

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

stock_dialog.py

@@ -58,10 +58,10 @@ class StockInDialog(QDialog):
         try:
             with self.get_conn() as conn:
                 # 查询面料基础信息
-                query = "SELECT model, color, supplier, unit FROM fabrics"
+                query = "SELECT model, color, supplier, unit FROM fabrics WHERE (is_deleted IS NULL OR is_deleted = 0)"
                 params = []
                 if keyword:
-                    query += " WHERE model LIKE ? OR color LIKE ?"
+                    query += " AND (model LIKE ? OR color LIKE ?)"
                     params = ["%" + keyword + "%", "%" + keyword + "%"]
                 query += " ORDER BY timestamp DESC"
                 cursor = conn.execute(query, params)