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/system.py

@@ -1,5 +1,5 @@
 # inventory-backend/app/models/system.py
-from app.extensions import db
+from app.extensions import db, beijing_time
 from werkzeug.security import generate_password_hash, check_password_hash
 from datetime import datetime
 
@@ -22,7 +22,7 @@ class SysUser(db.Model):
     role = db.Column(db.String(50))
     status = db.Column(db.String(20), default='active')
     password_hash = db.Column(db.Text)
-    created_at = db.Column(db.DateTime, default=datetime.now)
+    created_at = db.Column(db.DateTime, default=beijing_time)
 
     def set_password(self, password):
         """生成加密密码"""
@@ -76,7 +76,7 @@ class SysLog(db.Model):
     __tablename__ = 'sys_log'
 
     id = db.Column(db.Integer, primary_key=True)
-    op_time = db.Column(db.DateTime, default=datetime.now)
+    op_time = db.Column(db.DateTime, default=beijing_time)
     op_user_name = db.Column(db.String(100))
     op_user_id = db.Column(db.String(50))
     module_name = db.Column(db.String(100))
@@ -167,7 +167,7 @@ class SysWarehouseLocation(db.Model):
     full_path = db.Column(db.String(500))  # 完整路径，如 "A区/货架1/第3层"
     level = db.Column(db.Integer, default=0)  # 层级深度，顶级为0
     is_enabled = db.Column(db.Boolean, default=True)
-    created_at = db.Column(db.DateTime, default=datetime.now)
+    created_at = db.Column(db.DateTime, default=beijing_time)
     # 注意：数据库表中没有 updated_at 字段，不要添加！
 
     # 自关联 - 使用 backref 定义父节点的反向引用