docs(experimental): record the recorded-session testing exemption

packages/experimental/client-ui-perf/README.i18n.yaml

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   en: 7605bb868f93b4a8
   zh: 184ca10ce6680499
 /deepseek-ai-dsh-experimental-client-ui-perf/known-limitations-and-deferred-work:
-  en: 24c5100faa25e5e2
-  zh: 32eb34792b910607
+  en: 526884141849a5b8
+  zh: 395b021ea49c4d61
 /deepseek-ai-dsh-experimental-client-ui-perf/known-limitations-and-deferred-work/dev-note:
   en: 3518dbaf30fb19a6
   zh: 73565f0bcc32a364

packages/experimental/client-ui-perf/README.md

@@ -103,7 +103,7 @@ No effect. The package never constructs a model request and never mutates a prom
 - **Code-Mode dispatches merge by root-call context.** Inner calls carry no turn or step, so each root call opens its own context keyed by the root call id, and the builder merges its dispatches into the step that owns the runner. A window that lost the dispatch start still merges the calls but cannot show their measured duration.
 - **Older-page retries are explicit.** A page request reports `grew`, `exhausted`, or `retry`; when Chat or Trajectory owns the Session's in-flight page, the Statistics trigger stays visible instead of marking history exhausted or throwing.
 - **Known limitation: no whole-session wall projection.** The totals row substitutes model time + tool time because the host projections expose no whole-session wall clock. The tool segment sums paired call durations, so parallel calls can make that split look longer than a non-overlapping wall interval. This is recorded here; the view does not change host logic to fill the gap.
-- **Browser evidence is a test-only overlay.** Package tests cover folding, aggregation, formatting, and the jsdom table; `apps/web/tests/client-ui-perf-panel.e2e.ts` mounts the plugin through a test-only overlay over the shipped Web surface and compares a committed ARIA golden. No recorded-session scenario exists.
+- **Recorded-session coverage is exempted for this experimental PR.** Package tests cover folding, aggregation, formatting, paging, and the jsdom table; `apps/web/tests/client-ui-perf-panel.e2e.ts` mounts the plugin through a test-only overlay over the shipped Web surface and compares a committed ARIA golden. By owner decision, this experimental PR does not add a keyless recorded-session scenario; a profile or bundle promotion must add one.
 - **Late re-deliveries are not turns.** Compaction can restate a pruned tool result under its original turn and step after that turn left the window; a turn with no loaded start, prompt, or end marker is dropped instead of appearing as an empty ghost row.
 - **Timing is derived, not sampled.** Total time is the last step's end minus the first step's start; queueing and scheduler waits land in the "rest" segment. The total-time bar draws tool calls as the union of their paired intervals, so parallel calls count once; the tool column keeps the summed per-call time. A turn bar is scaled against the turns currently visible on screen, so a much larger turn that scrolled away does not flatten the rows in view.
 - **Prompt images load through the shared image cache.** The pill and its preview resolve durable attachments with `uiConversation.imageUrl`, so the cache owns and revokes the browser URLs per Session binding; the view creates none of its own. A failed read shows a localized failure state with retry. Touch clients do not open the hover preview; tapping the pill loads the first image directly.

packages/experimental/client-ui-perf/README.zh.md

@@ -103,7 +103,7 @@ kind: "package-reference"
 - **Code-Mode 内层调用按根调用上下文并回步骤。** 内层调用不带 turn/step，因此每个根调用各自开一个以 root call id 为键的上下文，由 builder 把它的派发并回持有 runner 的那一步。窗口里丢了派发起点时仍会合并调用，但无法给出它们各自的实测耗时。
 - **更早历史的加载结果显式区分重试。** 页面请求只返回 `grew`、`exhausted` 或 `retry`；如果 Chat 或轨迹视图正在加载同一个 Session 的页，统计视图会保留加载按钮，而不是误报历史已耗尽或抛出错误。
 - **已知限制：没有整段墙钟 projection。** 合计行的总用时用模型用时 + 工具用时替代，因为宿主 projection 没有整段墙钟；工具段是逐调用求和，并行调用会让这段显得比非重叠墙钟更长。这里作为已知限制记录，插件不为此改动宿主逻辑。
-- **浏览器证据是仅测试用的 overlay。** 包级测试覆盖折叠、汇总、格式化与 jsdom 表格；`apps/web/tests/client-ui-perf-panel.e2e.ts` 用仅测试用的 overlay 把插件挂到真实 Web 面上，并比对提交的 ARIA golden。由于还没有任何 shipped profile 挂载本包，暂无录制会话场景。
+- **本实验 PR 的 recorded-session 覆盖已获豁免。** 包测试覆盖折叠、聚合、格式化、分页与 jsdom 表格；`apps/web/tests/client-ui-perf-panel.e2e.ts` 通过仅测试用的 overlay 挂载 shipped Web 表面并比较已提交的 ARIA golden。经 owner 决定，本实验 PR 不新增 keyless recorded-session 场景；后续 profile 或 bundle 转正时必须补充。
 - **迟到重投不是轮次。** 压缩可能把被裁剪的工具结果按原来的轮次/步骤在之后重新投递；窗口里既没有加载到的起点、也没有问题或结束标记的轮次会被丢弃，不再显示成空的幽灵行。
 - **计时是推导值。** 总用时取最后一步结束减第一步开始；排队和调度等待落在「其余」段里。总用时条把工具调用画成配对区间之并，并行调用只算一次；工具列仍显示逐次求和。轮次时间条以当前屏幕内可见的轮次为刻度，滚出屏幕的超大轮次不会把本屏的行压扁。
 - **提问图片走共用图片缓存。** 标签与预览用 `uiConversation.imageUrl` 解析持久附件，浏览器 URL 由缓存按 Session binding 持有并释放，视图不自己创建 URL。读取失败时显示本地化失败状态并可重试。触屏不打开悬停预览，点击标签会直接加载第一张图。