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>

garment_dialogs.py

@@ -659,7 +659,7 @@ class GarmentEditDialog(QDialog):
         try:
             with self.get_conn() as conn:
                 cursor = conn.execute(
-                    "SELECT category, fabric_type, unit FROM fabrics WHERE model = ?",
+                    "SELECT category, fabric_type, unit FROM fabrics WHERE model = ? AND (is_deleted IS NULL OR is_deleted = 0)",
                     (base_model,)
                 )
                 row_db = cursor.fetchone()