fix timezone bug

models.py

@@ -1,6 +1,7 @@
 from flask_sqlalchemy import SQLAlchemy
 from flask_login import UserMixin
 from datetime import datetime
+from utils.timezone import taiwan_now
 
 db = SQLAlchemy()
 
@@ -53,7 +54,7 @@ class SpecHistory(db.Model):
     user_id = db.Column(db.Integer, db.ForeignKey('ts_user.id', ondelete='SET NULL'), nullable=True)
     action = db.Column(db.String(50), nullable=False)
     details = db.Column(db.Text, nullable=True)
-    timestamp = db.Column(db.DateTime, default=datetime.utcnow)
+    timestamp = db.Column(db.DateTime, default=taiwan_now)
 
     # 建立與 User 和 TempSpec 的關聯，方便查詢
     user = db.relationship('User')