fix: keep supervisor controls usable and prevent overlapping reviews

Allow only one active review across manual starts, automatic runs and resume. Add cancellation that holds admission through runtime cleanup, preserves saved batches and prevents cancelled runs from resuming.

Keep review controls usable during execution, show a dismissible progress notice and remove redundant filter labels. Include focused regressions and lifecycle documentation.

Release note: Supervision reviews can now be cancelled from Activity records. Starting another review shows the active review instead of duplicating work, while scope, time and refresh controls remain available.

docs/features/conversation-supervision/review-scheduling-design.md

@@ -28,6 +28,8 @@ schema 47 增加运行配置、来源清单、成功批次、导航节点四张
 
 `supervision:pause` 将父 signal 传入排队及在途模型；取消后的输出不提交。`supervision:resume` 恢复已保存 run；`supervision:batches` 默认每页 10 批、最多 20 批，返回完整叶子及来源。活动返回已保存批次、码点数、剩余来源、当前阶段、排队或执行中的模型任务数及已保存配置。提取和导航汇总持续运行至完成，不按累计运行时长暂停；用户暂停会中断在途请求，仅保留已保存批次。完成判定不依赖摘要措辞。
 
+2026-09-26 已接入整次回顾 single-flight、`supervision:cancel` 及实时 `supervision:execution`。手动重复请求不排队，自动请求等待；已取消运行从自动未完成查询中排除，也不能手动继续。持久取消与实际停止分开呈现，准入保留至 Runtime 清理结束。完整生命周期见[单次执行与取消](./technical-design.md#单次执行与取消)，第 1 节关于 `pending` 队列和缺少取消入口的描述仅为改造前基线。
+
 当前阶段以 `phase` 写入既有 `supervision_review_runs.state_json`，取值为 `collecting / extracting / summarizing / saving`；无新表或迁移。它记录服务最后进入的阶段，失败和重启后保留；完成仍由 `supervision_runs.status` 的发布事务决定。活动的 `navigationNodes` 从已保存导航表计数，`inFlight` 仍来自进程内计数。旧运行没有 phase 时不回填推测值。清单和最终发布为同步事务，短阶段不保证被轮询看到，清单事务失败也不会留下部分阶段记录。批次接口只有成功记录，没有逐个失败/在途任务或项目、会话聚合状态；界面仅按分页返回的真实归属组织详情。
 
 ### 当前设置合同