package models import "time" type User struct { ID int64 Email string } type Conversation struct { ID int64 OwnerID int64 Title string Created time.Time } type Node struct { ID int64 ConversationID int64 AuthorKind string // 'user' | 'assistant' Content string Created time.Time } type Branch struct { ID int64 ConversationID int64 Name string HeadNodeID int64 }