fix: 统一系统生成时间为北京时间(UTC+8)并优化审计日志表格列展示

inventory-backend/app/models/transaction.py

@@ -1,4 +1,4 @@
-from app.extensions import db
+from app.extensions import db, beijing_time
 from datetime import datetime
 from sqlalchemy import func
 
@@ -14,7 +14,7 @@ class TransBorrow(db.Model):
     barcode = db.Column(db.String(100))
     quantity = db.Column(db.Numeric(19, 4))
     borrower_name = db.Column(db.String(100))
-    borrow_time = db.Column(db.DateTime, default=datetime.now)
+    borrow_time = db.Column(db.DateTime, default=beijing_time)
     borrow_signature = db.Column(db.Text)
     expected_return_time = db.Column(db.DateTime)
     is_returned = db.Column(db.Boolean, default=False)
@@ -110,7 +110,7 @@ class TransScrap(db.Model):
     quantity = db.Column(db.Numeric(19, 4))
     reason = db.Column(db.Text)
     operator_name = db.Column(db.String(100))
-    operation_time = db.Column(db.DateTime, default=datetime.now)
+    operation_time = db.Column(db.DateTime, default=beijing_time)
     approver_name = db.Column(db.String(100))
     approval_status = db.Column(db.String(20), default='pending')
     cost_at_scrap = db.Column(db.Numeric(19, 4))