- V36: ai_plans/ai_subtasks/ai_conflicts 3 新表 + ai_messages/ai_tool_executions 加 subtask_id - models: PlanRecord/SubTaskRecord/ConflictRecord 结构体 - PlanRepo/SubTaskRepo/ConflictRepo CRUD(insert/get/list_by_*/update_status/resolve) - 7个 Repo 单元测试全部通过(内存 SQLite + 全迁移) - 顺带修复 task_repo.rs 预存测试编译错误(trec_full 参数类型+缺失 await)