出库逻辑添加，扫码识别编码成功，后续对应逻辑没有完成

inventory-backend/app/models/outbound.py

@@ -0,0 +1,42 @@
+from app.extensions import db
+from datetime import datetime
+
+
+class TransOutbound(db.Model):
+    __tablename__ = 'trans_outbound'
+
+    id = db.Column(db.Integer, primary_key=True)
+    outbound_no = db.Column(db.String(100), unique=True, nullable=False)  # 出库单号
+
+    # 关联源库存信息
+    sku = db.Column(db.String(100))
+    source_table = db.Column(db.String(50))  # 'stock_buy', 'stock_product', etc.
+    stock_id = db.Column(db.Integer)  # 对应源表的主键ID
+    barcode = db.Column(db.String(100))  # 实际扫码内容
+
+    # 业务信息
+    outbound_type = db.Column(db.String(50), default='SALES')  # SALES, USE, TRANSFER
+    quantity = db.Column(db.Numeric(19, 4), nullable=False)
+
+    # 签字与追溯
+    consumer_name = db.Column(db.String(100))  # 领用人/客户
+    signature_path = db.Column(db.Text)  # 签名图片路径
+    outbound_time = db.Column(db.DateTime, default=datetime.now)
+    operator_name = db.Column(db.String(100))  # 操作员
+
+    remark = db.Column(db.Text)
+
+    def to_dict(self):
+        return {
+            'id': self.id,
+            'outbound_no': self.outbound_no,
+            'sku': self.sku,
+            'source_table': self.source_table,
+            'outbound_type': self.outbound_type,
+            'quantity': float(self.quantity) if self.quantity else 0,
+            'consumer_name': self.consumer_name,
+            'signature_path': self.signature_path,
+            'outbound_time': self.outbound_time.strftime('%Y-%m-%d %H:%M:%S') if self.outbound_time else None,
+            'operator_name': self.operator_name,
+            'remark': self.remark
+        }