package models import "time" type User struct { ID int `json:"id"` Username string `json:"username"` PasswordHash string `json:"-"` DisplayName string `json:"display_name"` Role string `json:"role"` CreatedAt time.Time `json:"created_at"` LastLogin *time.Time `json:"last_login,omitempty"` } type LoginRequest struct { Username string `json:"username"` Password string `json:"password"` } type LoginResponse struct { Token string `json:"token"` ExpiresAt string `json:"expires_at"` User User `json:"user"` }