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/inbound/stocktake.py

@@ -1,4 +1,4 @@
-from app.extensions import db  # .material -> .base refactor checked
+from app.extensions import db, beijing_time  # .material -> .base refactor checked
 from datetime import datetime
 
 class StocktakeDraft(db.Model):
@@ -9,7 +9,7 @@ class StocktakeDraft(db.Model):
     uuid = db.Column(db.String(100))
     # ★ 新增 quantity 字段
     quantity = db.Column(db.Numeric(19, 4), default=1)
-    scan_time = db.Column(db.DateTime, default=datetime.now)
+    scan_time = db.Column(db.DateTime, default=beijing_time)
 
     def to_dict(self):
         return {