feat: restructure basic info menu, add kitting monitor table, and implement user preferences api

inventory-backend/app/models/system.py

@@ -22,6 +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)
+    preferences = db.Column(db.JSON, default=dict)  # 用户偏好/个性化配置（如齐套监控列表）
     created_at = db.Column(db.DateTime, default=beijing_time)
 
     def set_password(self, password):
@@ -61,6 +62,7 @@ class SysUser(db.Model):
             'department': self.department,
             'role': self.role,
             'status': self.status,
+            'preferences': self.preferences or {},
             'created_at': self.created_at.isoformat() if self.created_at else None
         }