Aska
48421923f6
feat(history): 会话消息持久化 + 主/次级会话(design/16)
- runtime/history: Store + HistoryStore 接口(Append/List 游标分页/Recent/DeleteSession/NewSubSession/ListSessions),主会话固定 web、次级 web:<uuid>
- db 迁移 0003: chat_sessions + chat_messages + idx_chat_msgs_session_created(事务幂等)
- gateway: GET/POST /sessions、GET /sessions/{id}/messages 热分页、DELETE /sessions/{id}(主不可删 403);Deps.History 可空注入
- 编排层落库: session_persist.go(submitInternal 写用户消息、completeTurn 写助手消息,拒绝的消息不落库)
- WS: wsEvent 加 sessionId 定向 + history 回放帧(握手上行后回放主会话最新 50 条,thinking 剥离)
- wire.go 装配 History 到 gateway.Deps.History
- 端到端实测: POST /sessions 建次级 201 / GET /sessions 列表 / POST /chat 后 /messages 读到 user+assistant / DELETE 次级成功 / DELETE 主会话 403
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