OK

models.py

@@ -9,9 +9,11 @@ class User(db.Model):
     __tablename__ = 'ms_users'
     id = db.Column(db.Integer, primary_key=True)
     username = db.Column(db.String(80), unique=True, nullable=False)
+    display_name = db.Column(db.String(100), nullable=True)  # For friendly display name like "ymirliu 劉念萱"
     password_hash = db.Column(db.String(128), nullable=False)
     role = db.Column(db.String(20), nullable=False, default='user') # 'user' or 'admin'
     created_at = db.Column(db.DateTime(timezone=True), server_default=func.now())
+    last_login = db.Column(db.DateTime(timezone=True), nullable=True)  # Track last login time
 
     def set_password(self, password):
         self.password_hash = bcrypt.generate_password_hash(password).decode('utf-8')
@@ -23,8 +25,10 @@ class User(db.Model):
         return {
             'id': self.id,
             'username': self.username,
+            'display_name': self.display_name,
             'role': self.role,
-            'created_at': self.created_at.isoformat() if self.created_at else None
+            'created_at': self.created_at.isoformat() if self.created_at else None,
+            'last_login': self.last_login.isoformat() if self.last_login else None
         }
 
 class Meeting(db.Model):