添加库存不足检查功能

在记录消耗到库存功能中增加了库存充足性验证，确保只有在所有原料库存充足时才允许记录消耗。

主要改进：
- 在记录消耗前先检查所有原料的当前库存
- 如果任何原料库存不足，显示详细的库存不足信息并中止操作
- 提供清晰的提示信息，显示每种原料所需数量和实际库存数量
- 只有所有原料库存都充足时才执行记录操作
- 优化成功提示信息，显示记录的原料种类数量

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

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

main.py

@@ -234,7 +234,7 @@ class FabricManager(QMainWindow):
             return
         quantity = self.quantity_input.value()
         loss_rate = self.loss_input.value() / 100
-        
+
         try:
             with self.get_conn() as conn:
                 cursor = conn.execute('''
@@ -243,21 +243,24 @@ class FabricManager(QMainWindow):
                     WHERE style_number = ?
                 ''', (style_number,))
                 rows = cursor.fetchall()
-                inserted = 0
+
-                
+                # 第一步：检查所有原料库存是否充足
+                insufficient_materials = []
+                materials_to_record = []
+
                 for category, fabric_type, usage_per_piece, unit in rows:
                     if usage_per_piece == 0:
                         continue
-                    
+
                     # 获取该原料在入库时使用的单位
                     stock_cursor = conn.execute('''
-                        SELECT unit FROM fabric_stock_in 
+                        SELECT unit FROM fabric_stock_in
-                        WHERE model = ? 
+                        WHERE model = ?
-                        ORDER BY purchase_date DESC 
+                        ORDER BY purchase_date DESC
                         LIMIT 1
                     ''', (category,))
                     stock_unit_row = stock_cursor.fetchone()
-                    
+
                     # 如果有入库记录，使用入库单位；否则使用原来的单位
                     if stock_unit_row:
                         stock_unit = stock_unit_row[0]
@@ -272,17 +275,59 @@ class FabricManager(QMainWindow):
                         # 没有入库记录，使用原单位
                         consume_qty = usage_per_piece * quantity * (1 + loss_rate)
                         final_unit = unit
-                    
+
+                    # 检查当前库存
+                    stock_info = conn.execute('''
+                        SELECT
+                            COALESCE(SUM(CASE WHEN si.is_deleted = 0 THEN si.quantity ELSE 0 END), 0) AS total_in,
+                            COALESCE(SUM(CASE WHEN c.is_deleted = 0 THEN c.consume_quantity ELSE 0 END), 0) AS total_out
+                        FROM fabrics f
+                        LEFT JOIN fabric_stock_in si ON f.model = si.model
+                        LEFT JOIN fabric_consumption c ON f.model = c.model
+                        WHERE f.model = ?
+                        GROUP BY f.model
+                    ''', (category,)).fetchone()
+
+                    if stock_info:
+                        total_in, total_out = stock_info
+                        current_stock = total_in - total_out
+                    else:
+                        current_stock = 0
+
+                    # 如果库存不足，记录下来
+                    if current_stock < consume_qty:
+                        material_name = category or "未命名材料"
+                        insufficient_materials.append(
+                            f"{material_name}: 需要 {consume_qty:.3f} {final_unit}，库存仅剩 {current_stock:.3f} {final_unit}"
+                        )
+                    else:
+                        # 库存充足，加入待记录列表
+                        materials_to_record.append((
+                            style_number, category, usage_per_piece, quantity,
+                            loss_rate, consume_qty, final_unit
+                        ))
+
+                # 如果有库存不足的材料，提示用户并中止操作
+                if insufficient_materials:
+                    message = "以下原料库存不足，无法记录消耗：\n\n" + "\n".join(insufficient_materials)
+                    QMessageBox.warning(self, "库存不足", message)
+                    return
+
+                # 第二步：所有库存都充足，执行记录
+                inserted = 0
+                for material_data in materials_to_record:
+                    style_num, model, single_usage, qty, loss, consume_qty, final_unit = material_data
                     conn.execute('''
                         INSERT INTO fabric_consumption
                         (style_number, model, single_usage, quantity_made, loss_rate, consume_quantity, consume_date, unit)
                         VALUES (?, ?, ?, ?, ?, ?, ?, ?)
-                    ''', (style_number, category, usage_per_piece, quantity, loss_rate, consume_qty, datetime.now().strftime('%Y-%m-%d'), final_unit))
+                    ''', (style_num, model, single_usage, qty, loss, consume_qty, datetime.now().strftime('%Y-%m-%d'), final_unit))
                     inserted += 1
+
                 conn.commit()
-                
+
             if inserted > 0:
-                QMessageBox.information(self, "成功", "本次生产消耗已记录到库存！")
+                QMessageBox.information(self, "成功", f"本次生产消耗已记录到库存！共记录 {inserted} 种原料。")
             else:
                 QMessageBox.information(self, "提示", "本次没有可记录的原料消耗")
         except Exception as e: