📝 docs: 记录 v1.0.10 的弹窗时长与完成提醒文案

✅ test: 覆盖弹窗生命周期、存储合并与插件页的时长选项
✨ feat(client): 弹窗可设自动关闭时间，完成提醒描述只显示标题
2026-10-05 00:29:37 +08:00 · 2026-10-05 00:29:36 +08:00 · 2026-10-05 00:29:36 +08:00 · 2026-10-05 00:20:59 +08:00 · 2026-10-05 00:20:59 +08:00 · 2026-10-05 00:20:59 +08:00
43 changed files with 5132 additions and 1419 deletions
@@ -1,6 +1,6 @@
-# 忽略安装与构建产物；这个包没有依赖，也没有构建步骤。
+# 忽略安装产物。注意 client.js 虽然也是构建产物，但它是有意提交的（见 README 的「仓库结构」），
+# 因为安装这个插件的人不该被要求装依赖、跑构建。
 node_modules/
-pnpm-lock.yaml
 *.tgz
 .DS_Store
 Thumbs.db
@@ -5,7 +5,8 @@
 #
 # 类型与 emoji：feat ✨ / fix 🐛 / docs 📝 / refactor ♻️ / perf ⚡️ /
 #              test ✅ / build 📦️ / ci 💚 / chore 🔧 / revert ⏪️
-# 作用域（可选）：client 浏览器半 / host 宿主半
+# 作用域（可选）：client 浏览器半 / host 宿主半 / build 构建与测试
 # 例：✨ feat(client): 后台走系统通知，前台走应用内轻弹窗
 # 例：🐛 fix(client): 前台判定改为现读可见性
 # 例：📝 docs: 安装说明补充 Git 标签与本地路径两种方式
+# 注意：改 src/client/** 后必须 `pnpm run build`，产物 client.js 要一起提交
@@ -2,6 +2,57 @@

 版本说明按倒序排列。提交信息遵循 [CONTRIBUTING.md](CONTRIBUTING.md) 的单行规范，因此每次改动"为什么这样改、影响面是什么"记在这里，而不是提交信息里。

+## v1.0.10
+
+- 新增：**应用内轻弹窗的自动关闭时间可以在插件页设置**（3 / 6 / 10 / 30 秒，或**永不**）。原来固定 6 秒，现在：
+  - 插件页多了一组「轻弹窗」，选项就是它要设的值，选中的那一个是主色按钮样式（`role=radiogroup`，键盘可聚焦）；
+  - 「永不」就是 `0`：卡片不再自己消失，要自己点 ✕ 或按 `Esc`。鼠标停在卡片上暂停计时的行为不变，同屏上限仍是 3 条，所以「永不」也不会越堆越多；
+  - 改这个值时，**屏幕上已有的卡片会按新值重新计时**（鼠标正停在上面那张除外，它要等你移开才开始计时），不会留着旧时间表继续走；
+  - 这个值与三个开关存在**同一份**浏览器本地记录里，各自的写入是合并式的：只存过开关的旧记录能正常升级，改开关也不会把关闭时间重置回去；取值只接受上列选项，别的值一律退回默认 6000ms。
+- 调整：**「会话已完成」的提醒，描述行只显示会话题目**。标题已经写着「会话已完成」，描述再写一遍「已完成这一轮回答」只是重复；现在描述就是会话标题本身（没有标题的会话仍显示「未命名会话」）。字典里的 `body.completion` 随之删除。
+- 顺带清掉两个死键：`settings.title`、`settings.kinds.label`（插件页早就改用 `config.section.*` 与 `settings.kind.*`，这两个键没有任何地方读）。现在中英各 62 个键，一一对应、没有死键。
+- 测试从 44 条增加到 52 条：弹窗生命周期的 5 条（按时关闭 / 永不由时间关闭 / 悬停暂停后按新值续期 / 非法值退回默认 / 同屏上限），存储的合并与校验 3 条，插件页新选项的渲染与回写 1 条。
+
+## v1.0.9
+
+- 轻弹窗改成 **DSH 的浮层卡片**，跟随 DSH 的深色 / 浅色模式。原来用的是 DSH 的 `--dsw-alias-toast-bg`，而那个令牌在**两种模式下都是深灰**（浅色模式 `#353638`、深色模式 `#43454a`），所以在浅色页面里浮窗是一块接近纯黑的板子，和周围的卡片不是一种东西。现在照 DSH 自己的做法来（下面这些都是 shell 主题里真实存在、并且会随 `body[data-ds-dark-theme]` 一起切换的令牌）：
+  - 底色 `--dsw-alias-bg-layer-2`：浅色 `#fff`、深色 `#2c2c2e`，和浮动菜单 / 弹窗用的是同一层；
+  - 发丝线与大阴影用 `--dsw-elevation-stroke-color` + `--dsw-elevation-prominent`（DSH 菜单的做法，发丝线取 `--dsw-alias-border-l1`：浅色 `#0000000a`、深色 `#ffffff0f`）；
+  - 文字改 `--dsw-alias-label-primary` / `-secondary` / `-tertiary`，不再是写死的白字加 `opacity`；
+  - 入场动画用 shell 自己的 `--ds-transition-duration` 与 `--ds-ease-in-out`。
+- 「查看」按钮改成 `--dsw-alias-state-business-primary`（浅色 `#4176e6`、深色 `#7aaaff`）；原来是写死的 `--dsw-static-deepseek-400`，在白底上对比度不够、也不随主题变化。关闭按钮用 `--dsw-alias-label-tertiary`，hover 升到主文字色。三类图标仍是状态令牌：完成绿 `#22c55e`、授权琥珀 `#dd8629`、提问蓝（随主题）。
+- 新增 `tests/unit/styles.test.js`（5 条）把两条不变量钉住：**样式表里不出现字面颜色、也不用 `--dsw-static-*` 这类不随主题切换的令牌**；弹窗必须用上面那套浮层配方，且**不许再出现 `--dsw-alias-toast-bg`**。以后谁把颜色写死、或又退回那个深色板子，测试会直接失败。
+- 行为未改：位置（右上角）、尺寸、停留时间、hover 暂停、`Esc` / ✕ 关闭、同屏 3 条都不变，只换皮。
+
+## v1.0.8
+
+- 修复：**授权与提问两类提醒从来不会弹**（只有「会话已完成」会弹）。原因不是判据写错了，而是投递前的「是否还值得提醒」那道闸门用错了事实：
+  - `stillWorth` 原本对所有提醒都要求「会话已经不在运行」，可待处理请求恰恰出现在会话仍在运行的时候——客户端的 `running` 只镜像宿主的 `api-session/status`，和有没有待处理请求是两件独立的事（`dsh-client-ui-session` 的 `observeRunning` 就是这么写的），于是每条授权 / 提问提醒都在 400ms 确认窗口结束时被静默丢掉；
+  - 更糟的是丢之前 `pendingNotice` 已经记下了这个请求，所以它再也不会被重新排进队列——同一请求只报一次的规则反而变成了"一次都不报"。
+  - 现在两类提醒用各自该问的问题：**待处理请求问「它还在等吗」**（请求被你自己答掉就不提醒，还在就提醒，不看运行状态），**完成提醒仍问「这一轮真的停下来了吗」**（在确认窗口里又跑起来就不提醒）。
+- 修复：**计划确认（`plan-review`）的文案从 v1.0.1 起就是死代码**——`copyFor` 先判断 `kind === 'question'`，而计划确认正是以 `kind: 'question'` 入队的，于是「计划正在等待你确认」永远走不到，实际显示的是提问那段文案。现在先看判别符，计划确认用自己的文案，与 README 的说明一致。
+- 投递节流不再丢待处理提醒：1.5 秒的洪泛保护原本会直接吃掉被拦下的提醒，现在**待处理请求**被拦下时会回到队列、下一个 tick 重试（只有你能清掉它，所以它一直是欠你的）；完成提醒保持原有的丢弃语义，多个会话同时结束仍然不会刷屏。
+- 重新设计插件页（**插件 → 会话通知**）：原来是一段孤立说明 + 四段标题与行标题同字号的段落，状态区把四句话和按钮挤在一行里。现在：
+  - 顶部一句「提醒是怎么送出去的」，下面三组：**提醒内容 / 系统通知权限 / 运行状态**，组标题加粗，组内是「左侧对象 + 右侧唯一控件」的列表，行之间用细线分隔；
+  - 权限状态带一个小圆点（绿=已开启，黄=未授权，红=被系统关掉，灰=当前环境不支持），下面一行按情况给出该去哪授权或该按钮验什么；
+  - 运行状态改成**键值对照表**（窗口状态 / 会话监听 / 最近一次投递 / 待补发提醒），最近一次投递拆成「时间 · 通道」加下一行提醒类型，不再是四个句子堆在一个格子里；
+  - 「测试提醒」独立成行右对齐，按钮区分主次（未授权时的「允许通知」是主按钮），行高与圆角统一。
+  - 字典随之增删：新增 `config.diag.watch`、`config.diag.replayValue`，`config.diag.replay` 改成短标签「待补发提醒」、`config.diag.replayNone` 改成「没有」，两个字典键集合仍然完全一致，没有死键。
+- 测试从 36 条增加到 39 条：新增「待处理请求放着 `running: true` 也照样该提醒」的回归用例（这条如果早就有，v1.0.7 之前就能发现上面那个 bug）、计划确认文案用例，并把页面渲染测试改到新的结构与文案上。
+
+## v1.0.7
+
+- 重构：**客户端源码拆成模块，`client.js` 从「手写文件」变成「构建产物」**。原来的 `client.js` 是 1452 行单文件，通知引擎、轻弹窗、插件页、观察器、字典、样式、图标全塞在一个 `apply` 里，改任何一处都要在同一个文件里上下翻。现在：
+  - `src/client/core/` 是行为：`observe`（一轮派生）、`delivery`（通道决策、节流、400ms 确认窗口）、`system-channel`（系统通知与平台回执）、`replay`（回前台补发）、`toasts`（弹窗栈与计时）、`actions`（两个测试按钮、权限请求、开关）、以及 `copy` / `session` / `storage` / `store` / `log`；
+  - `src/client/ui/` 是界面：`ToastLayer`、`KindRow`、`ConfigSection`、`NotifyObserver`、`icons`、`styles`、`hooks`；
+  - `src/client/i18n/` 是字典与翻译器，`src/client/platform.js` 是浏览器与平台事实，`src/client/plugin.js` 是组合根（建 store、装配模块、注册三个 slot），`src/client/index.js` 是构建入口。
+- **`client.js` 仍然是包根那一个文件，安装路径与发布清单都没变**：`exports`、`files`、`main`、`icon`、`dsh` 与 `cordis.patch.yml`、`locale/` 全部原样，使用者依旧零依赖、零构建。
+- 新增 `scripts/build-client.mjs`（esbuild）：把 `src/client/**` 打包成一个自包含单文件，并校验它仍然满足注册契约（只有一个 factory、`require('react')` 落在 factory 内、没有顶层 `import`/`export`、除了 `react` 不再向模块表要别的模块）。这一步无法省略：客户端模块系统只交给插件一个自包含 bundle，factory 里的 `require` 不能 require 同一个包里的相对文件。
+- 新增 `tests/`（`pnpm test`，用 `node --test`，无第三方依赖）：26 个纯函数单测（文案、会话派生、存储、字典与翻译器）、4 个产物测试（注册 id、factory 返回值、`apply` 在没有 DOM 的 Node 里也能跑通、**产物与 `src/**` 是否一致**）、6 个渲染测试（用一份最小 React 替身渲染插件页与轻弹窗，验证重构后的 props 装配：开关的选中态、诊断行、按钮回调、观察器的健康上报）。以后改完源码忘了重新构建，测试会直接失败。
+- 维护者现在需要跑一次 `pnpm install`（唯一 devDependency 是 esbuild）；**使用者不需要**。README 的安装说明按这个区分改写了，并新增「仓库结构」一节。
+- 行为未改：三类提醒的判定、通道选择、节流与确认窗口、补发与去重、开关的存储键、CSS 全文与 `dsn-*` 类名、全部字典键与文案都逐字保持（构建产物与 v1.0.6 的字符串逐条比对通过，样式表 4615 字节完全一致）。
+- 顺带记录一个**本次没有修的既有缺陷**：`body.planReview`（「计划正在等待你确认」）在 v1.0.6 里已是死代码——`copyFor` 先判断 `kind === 'question'`，而计划确认正是以 `kind: 'question'` 入队的，所以计划提醒实际显示的是提问那段文案。修它要调整判断顺序、属于行为变更，因此这次只把现状写进 `src/client/core/copy.js` 的注释，并在 `tests/unit/copy.test.js` 里钉住当前输出。
+
 ## v1.0.6

 - 修复：**窗口不在前台时，提醒有可能一次都看不到**。排查证据：一次真实投递（会话 17:52:29 结束）在插件页留下 `09:52:30 · 系统通知`——`09:52:30` 是 UTC，本机时间是 17:52:30；而 Windows 的通知平台记录 `LastNotificationAddedTime` 停在 70 分钟前。也就是说 `new Notification()` 没抛错，但**构造函数成功不等于通知真的弹出来了**，加上系统通知的气泡只存在几秒，人不在电脑前时它等于没送达。这一版不再把"发出去"当成"收到了"：
@@ -41,10 +41,11 @@

 ## 作用域约定

-这个插件只有一个包，作用域用来区分改动落在哪一半，不是必需的：
+这个插件只有一个包，作用域用来区分改动落在哪一块，不是必需的：

- `client`：浏览器半（`client.js`）—— 通知引擎、轻弹窗、插件页配置、观察器；
+- `client`：浏览器半（`src/client/**`，以及由它构建出的 `client.js`）—— 通知引擎、轻弹窗、插件页配置、观察器；
 - `host`：宿主半（`index.js`、`cordis.patch.yml`）—— 目前是空壳，只有它变化时才需要重启 DSH；
+- `build`：构建与测试（`scripts/build-client.mjs`、`package.json`、`tests/**`）；
 - 其它临时作用域（如 `deps`、`naming`）按需起，不必登记。

 ## 示例
@@ -35,9 +35,10 @@ DeepSeek Harness（DSH）插件：会话**需要你注意**时提醒你——窗
 轻弹窗的用法：

 - 点「查看」跳到该会话；
- 6 秒后自动消失；鼠标停在上面期间不消失，移开后重新计时；
+- **默认 6 秒**后自动消失（可在插件页改成 3 / 10 / 30 秒，或设成**永不关闭**）；鼠标停在上面期间都不消失，移开后重新计时；
 - 按 `Esc` 关掉最新的一条，或点 ✕ 关掉这一条；
- 同屏最多叠 3 条，更早的会被挤掉。
+- 同屏最多叠 3 条，更早的会被挤掉（即使设成永不关闭也一样，不会越堆越多）；
+- 轻弹窗是 DSH 的浮层卡片样式（和菜单、弹窗同一层底色与阴影），**跟随 DSH 的深色 / 浅色模式**。

 ## 设置

@@ -46,8 +47,9 @@ DeepSeek Harness（DSH）插件：会话**需要你注意**时提醒你——窗
 | 分组 | 内容 |
 | --- | --- |
 | 提醒内容 | **完成 / 授权 / 提问** 三个开关，分别控制三类提醒，默认全开；开关保存在浏览器本地，重开页面、重装插件都保留 |
-| 系统通知权限 | 当前权限状态；尚未授权时点「允许通知」请求授权（浏览器要求必须由你手动点击），授权成功后会自动发一条测试提醒。权限被系统层关闭时，会按当前平台告诉你去哪里打开 |
-| 运行状态 | 窗口现在是前台还是后台（即会走哪条通道）、插件是否真的在读会话状态、**最近一次提醒走的通道、系统是否确认弹出、时间**（本机时间），以及还有几条提醒在等你回到窗口时补发；旁边「测试提醒」按钮发一条测试提醒 |
+| 轻弹窗 | **自动关闭时间**：3 / 6 / 10 / 30 秒，或**永不**（永不时要自己点 ✕ 或按 `Esc`）；鼠标停在卡片上时都不会消失 |
+| 系统通知权限 | 一行状态（前面的小圆点表示健康程度）+ 一个按钮；尚未授权时按钮是「允许通知」（浏览器要求必须由你手动点击），授权成功后自动发一条测试提醒，按钮随之变成「测试系统通知」；权限被系统层关闭或当前环境不支持时，状态下面按当前平台告诉你去哪里打开 |
+| 运行状态 | 四项读数：**窗口状态**（前台还是后台，即会走哪条通道）、**会话监听**（插件是否真的在读会话状态）、**最近一次投递**（时间、走的通道、系统是否确认弹出，下一行是提醒类型）、**待补发提醒**（还有几条在等你回到窗口）；下面「测试提醒」按钮发一条测试提醒 |

 - 已经授权时，权限行的按钮变成「测试系统通知」：它直接走系统通知通道（窗口在前台也照发），专门用来验证系统通知本身是否可用。
 - 开关只影响提醒，不改 DSH 本身的任何设置。
@@ -59,10 +61,10 @@ DeepSeek Harness（DSH）插件：会话**需要你注意**时提醒你——窗
 在 DSH 的 **插件 → 添加插件** 的上方输入框里填：

 ```text
-https://gitea.iwake.top/dsh-plugin/session-notify.git#v1.0.6
+https://gitea.iwake.top/dsh-plugin/session-notify.git#v1.0.10
 ```

-`#` 后面跟标签或提交，用来锁定版本；不写则取默认分支。跟随 1.x 最新版可以写 `#semver:^1.0.6`。仓库是公开的，不需要凭据，也不用改「安装源」。
+`#` 后面跟标签或提交，用来锁定版本；不写则取默认分支。跟随 1.x 最新版可以写 `#semver:^1.0.10`。仓库是公开的，不需要凭据，也不用改「安装源」。

 ### 本地路径安装

@@ -74,8 +76,9 @@ D:\DeepSeek Harness Plugins\dsh-session-notify

 ### 安装之后

- 装好**刷新页面**即生效；本插件没有第三方依赖，也不需要 pnpm 下载或构建步骤。
+- 装好**刷新页面**即生效；仓库里已经带好构建产物，所以**既不需要 pnpm 下载，也不需要构建**，本插件运行时没有第三方依赖。
 - 卸载：在插件页里移除 `@dsh-plugin/session-notify`。
+- 上面这两条说的都是**使用者**。要改插件本身，只需要一个 `pnpm install`（唯一依赖是打包用的 esbuild），见下面的[仓库结构](#仓库结构)。

 ## 提醒规则

@@ -83,7 +86,7 @@ D:\DeepSeek Harness Plugins\dsh-session-notify
 - **正在看的那个会话完成后不打扰**。
 - **子智能体的会话不单独提醒**，等它归属的主会话结束时才提醒。
 - **空白会话完成不提醒**。
- **授权 / 提问如果出现的当下会话仍在运行，会先记下、等这一轮真正停下来再提醒**，不在模型还在跑的时候打扰你。
+- **授权 / 提问会立刻提醒，不押后**：待处理请求只有你能清掉，而会话「正在等它」本来就是会话的状态（`running` 是宿主自己的另一条事实，和有没有待处理请求无关），所以不会因为「会话还在跑」而压后提醒；请求在 400ms 确认窗口内被你自己答掉，就不再提醒。
 - **节流**：1.5 秒内只投递一条，多个会话同时完成不会刷屏。
 - **完成提醒有 400ms 的确认窗口**：如果那一轮马上又跑起来，就不报了。
 - **同一会话的完成提醒会覆盖上一条**（通知带 `tag`），不叠加堆积。
@@ -100,6 +103,32 @@ D:\DeepSeek Harness Plugins\dsh-session-notify

 需要 **DeepSeek Harness 0.2.0-rc.2 或更高**。

+## 仓库结构
+
+给要改这个插件本身的人；只是使用它的话，这一节不需要看。
+
+| 路径 | 是什么 |
+| --- | --- |
+| `src/client/` | 浏览器半的全部源码：`core/`（观察、投递、系统通知通道、补发、弹窗栈、开关与动作）、`ui/`（弹窗、开关行、插件页、观察器、图标、样式、hooks）、`i18n/`（中英文字典与翻译器）、`platform.js`（窗口可见性、通知权限、图标、平台提示）、`plugin.js`（组合根：建 store、装配模块、注册 slot） |
+| `client.js` | **构建产物**：`src/client/**` 打包成一个自包含单文件，由 DSH 的客户端模块系统加载。它提交进仓库——这正是安装免构建的原因 |
+| `index.js` / `main.js` | 宿主半（目前是空壳），以及给按 `main` 解析的加载器用的同义入口 |
+| `cordis.patch.yml`、`icon.svg`、`locale/` | 组合包 patch、图标、插件展示用的标题与简介 |
+| `scripts/build-client.mjs` | 构建脚本：打包，并校验产物仍然满足注册契约 |
+| `tests/` | `node --test`：纯函数单测、组件渲染测试（含轻弹窗与插件页）、产物冒烟、以及产物与源码是否一致 |
+
+**为什么必须是单个文件**：DSH 的客户端模块系统只把**一个自包含 bundle** 交给插件（`window.__ModuleLoader__.load({ id, factory })`），factory 里的 `require` 只能解析 `react` 这类平台模块，**不能** require 同一个包里的相对文件。所以源码拆成模块之后，必须再打包回单文件——官方客户端插件（例如 `dsh-experimental-client-ui-voice-input`）也是这个形态：`src/**` 源码 + 构建出的客户端 bundle。
+
+维护者命令：
+
+```bash
+pnpm install     # 只装 esbuild 一个 devDependency
+pnpm run build   # 从 src/client 重新生成 client.js —— 改完源码必须跑
+pnpm test        # node --test
+```
+
+- **不要直接改 `client.js`**：它每次构建都会被覆盖；改完 `src/` 忘记重新构建，`tests/bundle.test.js` 会直接报「产物已过期」。
+- 改完产物后，正在运行的 DSH 里要在插件页把这一行**停用再启用**（或重启 DSH）：宿主对客户端 bundle 有缓存，只刷新页面不一定重新读取它。
+
 ## License

 [MIT](LICENSE)
@@ -1,6 +1,6 @@
 {
  "name": "@dsh-plugin/session-notify",
-  "version": "1.0.6",
+  "version": "1.0.10",
  "private": true,
  "type": "module",
  "description": "会话完成、需要授权、需要回答时提醒你：窗口不在前台用系统通知，窗口在前台用应用内轻弹窗。",
@@ -34,6 +34,18 @@
  "engines": {
    "node": ">=22"
  },
+  "scripts": {
+    "build": "node scripts/build-client.mjs",
+    "test": "node --test"
+  },
+  "devDependencies": {
+    "esbuild": "0.28.2"
+  },
+  "pnpm": {
+    "onlyBuiltDependencies": [
+      "esbuild"
+    ]
+  },
  "dsh": {
    "manifestVersion": 1,
    "bundle": {
@@ -0,0 +1,285 @@
+lockfileVersion: '9.0'
+
+settings:
+  autoInstallPeers: true
+  excludeLinksFromLockfile: false
+
+importers:
+
+  .:
+    devDependencies:
+      esbuild:
+        specifier: 0.28.2
+        version: 0.28.2
+
+packages:
+
+  '@esbuild/aix-ppc64@0.28.2':
+    resolution: {integrity: sha512-XExcO+dvLKvVtNTibSTBej1NCAbaGhWn9Ww1ZPx80qsahhPFe/8jgWP0IchNe0F3HwkU7n8ejhH8bjonqht8mQ==}
+    engines: {node: '>=18'}
+    cpu: [ppc64]
+    os: [aix]
+
+  '@esbuild/android-arm64@0.28.2':
+    resolution: {integrity: sha512-5YfKeeI8qWfBZIX+u2xZC3Zlb3Os/gLS2sbEKM+I4ZOcsWmHS2WLysCcQZDAFRslDUU5Oiq44gf6PYN1vGwG5A==}
+    engines: {node: '>=18'}
+    cpu: [arm64]
+    os: [android]
+
+  '@esbuild/android-arm@0.28.2':
+    resolution: {integrity: sha512-kXXoiPVVGQcnIYGOeaovwOURpniDBpSq4A03qkQ+BMQqtGG6HYap3xne9C1O1yo4TR3qxlCX5IqqmX6fFo2Lqg==}
+    engines: {node: '>=18'}
+    cpu: [arm]
+    os: [android]
+
+  '@esbuild/android-x64@0.28.2':
+    resolution: {integrity: sha512-O387ite7SzUyCcy3JQX4P4bLtEA7bLLkx+esve5JHnyYfNTxcVpXZo9jhdB0lTKN44gztELTdU7nS8Nr16Fs1Q==}
+    engines: {node: '>=18'}
+    cpu: [x64]
+    os: [android]
+
+  '@esbuild/darwin-arm64@0.28.2':
+    resolution: {integrity: sha512-n4KqkOQrraxHJcgjM1RvwbigfQKIKJVpM7xp+KsxiyUSrRdIXnt73VhrPAx0fV44hgfmIVKjxMN9J1t5jySVkw==}
+    engines: {node: '>=18'}
+    cpu: [arm64]
+    os: [darwin]
+
+  '@esbuild/darwin-x64@0.28.2':
+    resolution: {integrity: sha512-uq6suIWYP37qzGddBKPw5QEQPi6HiLGsO7UmkpfyaYNQ3D+rN6w6WfwH+nuqcGXWvawGwxOEroO4YGnFh95azw==}
+    engines: {node: '>=18'}
+    cpu: [x64]
+    os: [darwin]
+
+  '@esbuild/freebsd-arm64@0.28.2':
+    resolution: {integrity: sha512-n+I0BTSRIoy+d6RPKnEVwql5UwBJolytvY4mAOIEJorKlqgPII8ix6slVVrfZ5Tnj7glIZvloylbB/EJPMWEXw==}
+    engines: {node: '>=18'}
+    cpu: [arm64]
+    os: [freebsd]
+
+  '@esbuild/freebsd-x64@0.28.2':
+    resolution: {integrity: sha512-78XJTJkvPs0kz2w61301PJjXl4g7q3JqiYMZ/M/yVI73EHBrCRTgkhu9oqG7vPqq+a/yadEW8aD+agKlk5xrmg==}
+    engines: {node: '>=18'}
+    cpu: [x64]
+    os: [freebsd]
+
+  '@esbuild/linux-arm64@0.28.2':
+    resolution: {integrity: sha512-pW4AC0P3it8c7do9MVM4p51FzHzdM/TZrerurgRcHJ2WTa1VQ1CIq18xncfpBJw4ojkiZZrKW2yIBWBP92j6Ug==}
+    engines: {node: '>=18'}
+    cpu: [arm64]
+    os: [linux]
+
+  '@esbuild/linux-arm@0.28.2':
+    resolution: {integrity: sha512-XlDnu2q5yoqems+xay6wSAcg9DDD7K9RLKZEBOMZm3ckNpJBvOX20tSfby8KfrrhINDyv9V2YVZKY/SpoGJI8w==}
+    engines: {node: '>=18'}
+    cpu: [arm]
+    os: [linux]
+
+  '@esbuild/linux-ia32@0.28.2':
+    resolution: {integrity: sha512-CYbnj78HsIeA+DhgUKgFCfvNsTHFhMMrinUrMZpDXJXKN8T3XViTZ/+wtHeVxEWY8ewSzTFN+nRmSwO2tZaLUQ==}
+    engines: {node: '>=18'}
+    cpu: [ia32]
+    os: [linux]
+
+  '@esbuild/linux-loong64@0.28.2':
+    resolution: {integrity: sha512-buwkd8nsph4R+ajRvw0qM5Hja/TXQow3ptzWO2EbG/cqcIkHloRrdlBtQlshyYGTNFvfkfJ5tpPLVkY4DtsPfQ==}
+    engines: {node: '>=18'}
+    cpu: [loong64]
+    os: [linux]
+
+  '@esbuild/linux-mips64el@0.28.2':
+    resolution: {integrity: sha512-ZVykbDyk7519VwiNb9Lcj9m8XM6v5V9uKPvrEMkkEedVewf+0itkhahp4HDpgERXhwLRpWFypsGbG/J8s0QjJA==}
+    engines: {node: '>=18'}
+    cpu: [mips64el]
+    os: [linux]
+
+  '@esbuild/linux-ppc64@0.28.2':
+    resolution: {integrity: sha512-CAXl+Dtd9UUuJd8pKKdwh6MLm3MUMiqMPmhZ3tTSXPqfyQ3vDl6R5hZdZ/kYojK4ofXtdfSv1tFq8XzWx3heNQ==}
+    engines: {node: '>=18'}
+    cpu: [ppc64]
+    os: [linux]
+
+  '@esbuild/linux-riscv64@0.28.2':
+    resolution: {integrity: sha512-GeXCej4IQtU1B+QlDV8W/RRvbzI3O/Stss+/bCXv4lZls5WGRtu2a+3JkA3i4qIUlMXpcHebWpF8AkJhATowuA==}
+    engines: {node: '>=18'}
+    cpu: [riscv64]
+    os: [linux]
+
+  '@esbuild/linux-s390x@0.28.2':
+    resolution: {integrity: sha512-3H1weTYZPxt/WOhByszQZybS9w5lKzUn1FDMsgEChbHWQwHYQQRfBxgCcZvPhjHfKyJjIievvMmEUawJrdY9Dg==}
+    engines: {node: '>=18'}
+    cpu: [s390x]
+    os: [linux]
+
+  '@esbuild/linux-x64@0.28.2':
+    resolution: {integrity: sha512-4xTZr1FUmSoQW4XIWmit3tzQrUTZM+N3P0XV8xROKYF50XfI7xeO90+1bZvNwxIufQ9hDQVRJH5YhgPVF8A/HQ==}
+    engines: {node: '>=18'}
+    cpu: [x64]
+    os: [linux]
+
+  '@esbuild/netbsd-arm64@0.28.2':
+    resolution: {integrity: sha512-sSATRjPeDBg3pdgHoQfoYBob11Kk1FGa9lui5RIHZCoCkJa9QKlvl3/vKz2usCmYYjs7ymJR/2Nnsqe+Hjt5nw==}
+    engines: {node: '>=18'}
+    cpu: [arm64]
+    os: [netbsd]
+
+  '@esbuild/netbsd-x64@0.28.2':
+    resolution: {integrity: sha512-lqnzCV+mM0gIADaKihiCg6ifgfU2L3h5E33rNQBN1Y4MaVGnzryzmvvf7UHxprpQdE8hpqLolJ9Rl+SkIRDpyw==}
+    engines: {node: '>=18'}
+    cpu: [x64]
+    os: [netbsd]
+
+  '@esbuild/openbsd-arm64@0.28.2':
+    resolution: {integrity: sha512-AL2qJILH7lNjrDmCQDvdxMfAUIv8KMNZOvrwAQ8i8//ntL9FflhOyMJ8OZSMBb8/AWXe3/5v5S20y3zCoZWKoQ==}
+    engines: {node: '>=18'}
+    cpu: [arm64]
+    os: [openbsd]
+
+  '@esbuild/openbsd-x64@0.28.2':
+    resolution: {integrity: sha512-QtiuPytchRyC4rwUKhexJdQKvDuZ6hWloi3igqPQNUJCS1/v9EiO3UTOXR6A3FoMo4fnAKbWJdqaIwhOzh8qEw==}
+    engines: {node: '>=18'}
+    cpu: [x64]
+    os: [openbsd]
+
+  '@esbuild/openharmony-arm64@0.28.2':
+    resolution: {integrity: sha512-WkhYDmpTjLvGlScA1rwjRUmhl4k8oXR3cIbtqWmELgU/dFeHHlEllxDvdWcNJV9rbzCexB5vz8gtNewWLgCT7Q==}
+    engines: {node: '>=18'}
+    cpu: [arm64]
+    os: [openharmony]
+
+  '@esbuild/sunos-x64@0.28.2':
+    resolution: {integrity: sha512-GPMSkTOtMnv2U2F8gxe4Io6qmVs+YKyp832Etqqxr0hFngmXQ3rzwytelm3GIn7T4VviRUlf3sOgBOiTdvaf7g==}
+    engines: {node: '>=18'}
+    cpu: [x64]
+    os: [sunos]
+
+  '@esbuild/win32-arm64@0.28.2':
+    resolution: {integrity: sha512-PIhhEkE9uPBleRBrQEJpUn7MBnibZzbGzYWPmY3x+YoVg/95zbjB4CxPPOQ8l5tYYM4mMaCthF8/1DIfBQQyWQ==}
+    engines: {node: '>=18'}
+    cpu: [arm64]
+    os: [win32]
+
+  '@esbuild/win32-ia32@0.28.2':
+    resolution: {integrity: sha512-YmJbfTlvU7Sdn9BB+4PRES4oB6pxgS37MAONj+hBr/cpXS1aBPKXxNnDbu+QCWPj0o9dgyxeq79g6c5P8KeuYA==}
+    engines: {node: '>=18'}
+    cpu: [ia32]
+    os: [win32]
+
+  '@esbuild/win32-x64@0.28.2':
+    resolution: {integrity: sha512-5ebpxr3nWMzrL/rnUI755Jkuee0bHL/Gq0WTF9lvcpv73wAp5eu8MfBUgWK9bhWvZjj7yX8etf/8tI8Ney695g==}
+    engines: {node: '>=18'}
+    cpu: [x64]
+    os: [win32]
+
+  esbuild@0.28.2:
+    resolution: {integrity: sha512-HKVLS8dvII+xoKW9kmqxbRKrnWEXfJJr/FZhhJmiqIB0e053QNYFqOBouTMO/k5sID4MvCiUCvv8b9M4h32wIA==}
+    engines: {node: '>=18'}
+    hasBin: true
+
+snapshots:
+
+  '@esbuild/aix-ppc64@0.28.2':
+    optional: true
+
+  '@esbuild/android-arm64@0.28.2':
+    optional: true
+
+  '@esbuild/android-arm@0.28.2':
+    optional: true
+
+  '@esbuild/android-x64@0.28.2':
+    optional: true
+
+  '@esbuild/darwin-arm64@0.28.2':
+    optional: true
+
+  '@esbuild/darwin-x64@0.28.2':
+    optional: true
+
+  '@esbuild/freebsd-arm64@0.28.2':
+    optional: true
+
+  '@esbuild/freebsd-x64@0.28.2':
+    optional: true
+
+  '@esbuild/linux-arm64@0.28.2':
+    optional: true
+
+  '@esbuild/linux-arm@0.28.2':
+    optional: true
+
+  '@esbuild/linux-ia32@0.28.2':
+    optional: true
+
+  '@esbuild/linux-loong64@0.28.2':
+    optional: true
+
+  '@esbuild/linux-mips64el@0.28.2':
+    optional: true
+
+  '@esbuild/linux-ppc64@0.28.2':
+    optional: true
+
+  '@esbuild/linux-riscv64@0.28.2':
+    optional: true
+
+  '@esbuild/linux-s390x@0.28.2':
+    optional: true
+
+  '@esbuild/linux-x64@0.28.2':
+    optional: true
+
+  '@esbuild/netbsd-arm64@0.28.2':
+    optional: true
+
+  '@esbuild/netbsd-x64@0.28.2':
+    optional: true
+
+  '@esbuild/openbsd-arm64@0.28.2':
+    optional: true
+
+  '@esbuild/openbsd-x64@0.28.2':
+    optional: true
+
+  '@esbuild/openharmony-arm64@0.28.2':
+    optional: true
+
+  '@esbuild/sunos-x64@0.28.2':
+    optional: true
+
+  '@esbuild/win32-arm64@0.28.2':
+    optional: true
+
+  '@esbuild/win32-ia32@0.28.2':
+    optional: true
+
+  '@esbuild/win32-x64@0.28.2':
+    optional: true
+
+  esbuild@0.28.2:
+    optionalDependencies:
+      '@esbuild/aix-ppc64': 0.28.2
+      '@esbuild/android-arm': 0.28.2
+      '@esbuild/android-arm64': 0.28.2
+      '@esbuild/android-x64': 0.28.2
+      '@esbuild/darwin-arm64': 0.28.2
+      '@esbuild/darwin-x64': 0.28.2
+      '@esbuild/freebsd-arm64': 0.28.2
+      '@esbuild/freebsd-x64': 0.28.2
+      '@esbuild/linux-arm': 0.28.2
+      '@esbuild/linux-arm64': 0.28.2
+      '@esbuild/linux-ia32': 0.28.2
+      '@esbuild/linux-loong64': 0.28.2
+      '@esbuild/linux-mips64el': 0.28.2
+      '@esbuild/linux-ppc64': 0.28.2
+      '@esbuild/linux-riscv64': 0.28.2
+      '@esbuild/linux-s390x': 0.28.2
+      '@esbuild/linux-x64': 0.28.2
+      '@esbuild/netbsd-arm64': 0.28.2
+      '@esbuild/netbsd-x64': 0.28.2
+      '@esbuild/openbsd-arm64': 0.28.2
+      '@esbuild/openbsd-x64': 0.28.2
+      '@esbuild/openharmony-arm64': 0.28.2
+      '@esbuild/sunos-x64': 0.28.2
+      '@esbuild/win32-arm64': 0.28.2
+      '@esbuild/win32-ia32': 0.28.2
+      '@esbuild/win32-x64': 0.28.2
@@ -0,0 +1,155 @@
+// Bundles the browser half's modules into the single self-contained `client.js`
+// this package is served through.
+//
+// `dsh-client-modules` hands a plugin bundle one lazy CJS factory whose
+// `require` resolves against the module table (platform seeds such as `react`,
+// and other plugins' rows) — never against relative files. A client entry must
+// therefore be one self-contained script that registers exactly one factory,
+// and every module of this package has to be inlined into it. Source of truth:
+// `src/client/**`; the generated `client.js` at the repository root is the
+// artifact DSH serves, and it is committed so installing this plugin still needs
+// no build step.
+//
+// Usage:
+//   node scripts/build-client.mjs          # rebuild client.js
+//   node --test tests                      # also asserts the artifact is fresh
+import { readFile, writeFile } from 'node:fs/promises'
+import { dirname, resolve } from 'node:path'
+import { fileURLToPath, pathToFileURL } from 'node:url'
+
+const repoRoot = resolve(dirname(fileURLToPath(import.meta.url)), '..')
+const entryPoint = resolve(repoRoot, 'src/client/index.js')
+const targetPath = resolve(repoRoot, 'client.js')
+
+/** The module-table name this bundle's factory is registered under. */
+const packageName = JSON.parse(await readFile(resolve(repoRoot, 'package.json'), 'utf8')).name
+
+// The wrapper. Everything the bundler emits goes INSIDE the factory, so the
+// module table's own `require` is in scope for it: `require('react')` runs when
+// the bundle materializes, not when the script is executed, which is the
+// laziness contract the module system documents.
+const banner = [
+  '// Generated by scripts/build-client.mjs — do not edit this file.',
+  '// Source of truth: src/client/**. Run `pnpm run build` after changing it.',
+  `// Served by dsh-client-modules at /plugins/${packageName}/client.js.`,
+  'window.__ModuleLoader__.load({',
+  `  id: '${packageName}',`,
+  '  factory(require) {',
+  '    const module = { exports: {} }',
+  '    // Same object as `module.exports`; kept so the emitted body may assign',
+  '    // through either binding.',
+  '    const exports = module.exports',
+  '',
+].join('\n')
+
+const footer = [
+  '',
+  '    return module.exports',
+  '  },',
+  '})',
+  '',
+].join('\n')
+
+/** Referenced modules that are NOT platform seeds, and must reach `dsh.client.external`. */
+const external = ['react']
+
+/** How the wrapper is recognized in a built artifact; the test suite reuses it. */
+export const WRAPPER = {
+  load: 'window.__ModuleLoader__.load({',
+  id: `id: '${packageName}',`,
+  factory: 'factory(require) {',
+  ret: 'return module.exports',
+  footer: '})',
+}
+
+/**
+ * Load esbuild through a dynamic import, so a checkout without devDependencies
+ * gets one actionable sentence instead of a module-resolution stack.
+ * @returns the esbuild module.
+ */
+async function loadEsbuild() {
+  try {
+    return await import('esbuild')
+  } catch {
+    throw new Error('esbuild is missing — run `pnpm install` in the repository root first')
+  }
+}
+
+/**
+ * Refuse to ship an artifact that does not honor the registration contract.
+ *
+ * These checks are the machine-readable half of the reason this repository has a
+ * build step at all: a bundle that escapes the factory, that carries a top-level
+ * `import`, or that asks the module table for something undeclared would fail in
+ * the page rather than here.
+ * @param source - the bundled artifact text.
+ */
+function assertBundleShape(source) {
+  if (!source.startsWith('// Generated by scripts/build-client.mjs')) {
+    throw new Error('bundle does not start with the generated-file header')
+  }
+  for (const [what, needle] of Object.entries(WRAPPER)) {
+    if (!source.includes(needle)) throw new Error(`bundle is missing its ${what}: ${needle}`)
+  }
+  if (!source.trimEnd().endsWith(WRAPPER.footer)) {
+    throw new Error('bundle does not close the registration wrapper')
+  }
+
+  const factoryAt = source.indexOf(WRAPPER.factory)
+  const reactAt = source.indexOf('require("react")')
+  if (reactAt === -1) throw new Error('bundle never requires react')
+  if (reactAt < factoryAt) throw new Error('bundle requires react outside the factory, so it would load eagerly')
+
+  if (/^\s*(?:import|export)\s/m.test(source)) {
+    throw new Error('bundle has a top-level import/export statement; it is not a self-contained script')
+  }
+  const requested = new Set([...source.matchAll(/\brequire\(\s*"([^"]+)"\s*\)/g)].map((match) => match[1]))
+  for (const specifier of requested) {
+    if (!external.includes(specifier)) {
+      throw new Error(`bundle asks the module table for "${specifier}" — declare it in dsh.client.external and build-client.mjs`)
+    }
+  }
+}
+
+/**
+ * Bundle the browser half.
+ * @param options - `write: false` returns the artifact without touching the repository.
+ * @returns the bundled `client.js` text.
+ */
+export async function buildClient({ write = true } = {}) {
+  const { build } = await loadEsbuild()
+  const result = await build({
+    entryPoints: [entryPoint],
+    outfile: 'client.js',
+    bundle: true,
+    format: 'cjs',
+    platform: 'browser',
+    target: 'es2022',
+    charset: 'utf8',
+    minify: false,
+    legalComments: 'none',
+    external,
+    banner: { js: banner },
+    footer: { js: footer },
+    write: false,
+    logLevel: 'warning',
+  })
+
+  const produced = result.outputFiles?.[0]?.text
+  if (typeof produced !== 'string' || produced === '') throw new Error('esbuild produced no output')
+  // The repository is LF-only (see .gitattributes) and the artifact is reviewed
+  // as a diff, so nothing here may follow the build machine's conventions:
+  // esbuild emits LF, and this keeps that true if a future option changes it.
+  const built = produced.replace(/\r\n/g, '\n')
+  assertBundleShape(built)
+  if (write) await writeFile(targetPath, built, 'utf8')
+  return built
+}
+
+const invokedDirectly = process.argv[1] !== undefined
+  && pathToFileURL(process.argv[1]).href === import.meta.url
+
+if (invokedDirectly) {
+  const built = await buildClient()
+  console.log(`session-notify: client.js rebuilt from src/client (${built.length} bytes)`)
+}
@@ -0,0 +1,56 @@
+/**
+ * Fixed vocabulary shared by every module of the browser half.
+ *
+ * These values are this package's own contract rather than configuration: the
+ * trigger ids are read by the store, the copy table and the settings row at the
+ * same time, the timing constants are quoted in README.md's rule list, and the
+ * storage key is the browser-local preference this package owns. Keeping them
+ * in one module is what lets the others stay about behavior.
+ *
+ * @module @dsh-plugin/session-notify/client/constants
+ */
+
+/** Locale namespace owned by this package. */
+export const NS = 'session-notify'
+
+/** This package's name: the plugin manager keys a bundle's configuration by it. */
+export const PACKAGE_NAME = '@dsh-plugin/session-notify'
+
+/** Trigger ids shared by the store, the copy table, and the settings row. */
+export const KINDS = ['completion', 'approval', 'question']
+
+/** Pending-interaction kinds the Harness itself renders, and this plugin serves. */
+export const PENDING_KINDS = ['approval', 'question', 'plan-review']
+
+/** Shortest gap between two deliveries, so parallel finishes cannot flood. */
+export const THROTTLE_MS = 1500
+
+/** Settle delay before a completion is delivered, so a resumed run stays silent. */
+export const SETTLE_MS = 400
+
+/** Default in-app popup lifetime, and how many may stack. */
+export const TOAST_DURATION_MS = 6000
+export const TOAST_LIMIT = 3
+
+/**
+ * The popup lifetimes the settings page offers, in milliseconds, in the order it
+ * shows them. `0` is the "never auto-close" choice: such a card stays until the
+ * user dismisses it (✕, `Esc`, or a newer card pushing it out).
+ */
+export const DISMISS_CHOICES = [3000, 6000, 10000, 30000, 0]
+
+/** Notifications kept referenced, so a collection can never cancel a pending display. */
+export const RAISED_LIMIT = 8
+
+/** Alerts carried by the system channel and still worth replaying in-app on return. */
+export const REPLAY_LIMIT = 8
+
+/** How long a system notification outlives the moment the user comes back. */
+export const REPLAY_TTL_MS = 30 * 60 * 1000
+
+/**
+ * A confirmed banner that the user came back to within this window is treated as
+ * seen: the desktop notification is still on screen at that moment, so replaying
+ * it in-app would be a duplicate rather than a reminder.
+ */
+export const REPLAY_QUIET_MS = 20 * 1000
@@ -0,0 +1,102 @@
+/**
+ * What the settings page can do: the two test buttons, the permission request,
+ * and the trigger switches.
+ *
+ * @module @dsh-plugin/session-notify/client/core/actions
+ */
+
+import { notificationApi, notificationPermission } from '../platform.js'
+import { writeStoredDismissMs, writeStoredKinds } from './storage.js'
+import { text } from './log.js'
+
+/**
+ * Build the actions over one store.
+ * @param deps - the plugin store; the translate function; the delivery path (the
+ *   test alert goes through the ordinary channel decision); the system channel
+ *   (the channel-specific test); the popup stack (used when the system channel
+ *   refuses a test); and `publish` for the one branch that only re-renders.
+ * @returns the actions the settings page and the permission row call.
+ */
+export function createActions({ store, t, delivery, system, toasts, publish }) {
+  /** Build one test alert that skips the throttle and the "on screen" rule. */
+  const testCandidate = (title) => ({
+    kind: 'completion',
+    sessionId: 'test',
+    title,
+    detail: '',
+    pendingKind: '',
+    test: true,
+  })
+
+  /**
+   * Raise one test alert through whichever channel the window state selects.
+   * Verified from the config page, where the user is looking at the app, so it
+   * normally lands in the popup — the way to prove the system channel is to
+   * press the button in a channel-specific test instead.
+   */
+  const sendTest = () => {
+    delivery.deliver(testCandidate(t('config.testAny')), true)
+  }
+
+  /** Raise the test alert on the system channel specifically, whatever the focus is. */
+  const sendTestSystem = () => {
+    const candidate = testCandidate(t('config.testSystem'))
+    const result = system.notifySystem(candidate, true)
+    if (result.outcome === 'raised') {
+      delivery.recordDelivery('system', candidate, result)
+      return
+    }
+    toasts.showToast(candidate)
+    delivery.recordDelivery(`system-refused-${result.outcome}`, candidate)
+  }
+
+  /** Request notification permission inside a user gesture, then report the outcome. */
+  const requestPermission = async () => {
+    const Ctor = notificationApi()
+    if (Ctor === undefined) {
+      publish()
+      return
+    }
+    try {
+      let result = Ctor.requestPermission()
+      if (result === undefined) {
+        result = new Promise((resolve) => {
+          Ctor.requestPermission((value) => resolve(value))
+        })
+      }
+      await result
+    } catch (error) {
+      const snapshot = store.getSnapshot()
+      store.set({ ...snapshot, promptError: t('settings.permission.promptFailed', { message: text(error) }) })
+      return
+    }
+    const snapshot = store.getSnapshot()
+    store.set({ ...snapshot, permission: notificationPermission(), promptError: '' })
+    if (notificationPermission() === 'granted') sendTest()
+  }
+
+  /** Toggle one trigger and remember the choice. */
+  const setKindEnabled = (kind, enabled) => {
+    const snapshot = store.getSnapshot()
+    const kinds = { ...snapshot.kinds, [kind]: enabled }
+    writeStoredKinds(kinds)
+    store.set({ ...snapshot, kinds })
+  }
+
+  /**
+   * Remember how long an in-app popup lives.
+   *
+   * The stack reads this at the moment it arms a card, and the cards already on
+   * screen are re-armed so the new choice applies to them too — except a card the
+   * pointer is resting on, which nothing may close.
+   * @param ms - milliseconds, or `0` for "never auto-close".
+   */
+  const setDismissAfter = (ms) => {
+    writeStoredDismissMs(ms)
+    const snapshot = store.getSnapshot()
+    store.set({ ...snapshot, dismissAfterMs: ms })
+    toasts.rearmAll()
+  }
+
+  return { sendTest, sendTestSystem, requestPermission, setKindEnabled, setDismissAfter }
+}
@@ -0,0 +1,74 @@
+/**
+ * The delivered copy: what a candidate becomes once it is on screen, plus the
+ * two diagnoses the settings page prints about past deliveries.
+ *
+ * @module @dsh-plugin/session-notify/client/core/copy
+ */
+
+/**
+ * Build the copy table for one translate function.
+ * @param t - the translate function every string here goes through.
+ * @returns `copyFor` (candidate → notice), `deliveryFacts` and `replayValue`
+ *   (the two status values the settings page shows).
+ */
+export function createCopy(t) {
+  /** Build the delivered copy for one candidate. */
+  const copyFor = (candidate) => {
+    const title = candidate.title === '' ? t('body.untitled') : candidate.title
+    if (candidate.kind === 'completion') {
+      // The heading already says what happened ("conversation finished"), so the
+      // description is the conversation itself — naming it twice would only make
+      // the card longer.
+      return { kind: 'completion', title: t('notification.completion'), body: title }
+    }
+    // A plan review arrives as a question with its own discriminator, so it is
+    // answered before the question branch below — a plan review says what it is,
+    // rather than repeating the plan text the user has not read yet.
+    if (candidate.pendingKind === 'plan-review') {
+      return { kind: 'question', title: t('notification.question'), body: t('body.planReview', { title }) }
+    }
+    if (candidate.kind === 'question') {
+      const question = candidate.detail
+      return {
+        kind: 'question',
+        title: t('notification.question'),
+        body: question === '' ? t('body.question', { title }) : `${title} · ${question}`,
+      }
+    }
+    const tool = candidate.detail
+    return {
+      kind: 'approval',
+      title: t('notification.approval'),
+      body: tool === '' ? t('body.approvalPlain', { title }) : t('body.approval', { title, tool }),
+    }
+  }
+
+  /**
+   * Split the newest delivery into the three facts the status list shows.
+   * @param last - `store.lastDelivery`.
+   * @param tr - the translate function the outcome label is rendered with.
+   * @returns `{ at, outcome, title }`, or null when nothing was ever delivered.
+   */
+  const deliveryFacts = (last, tr) => {
+    if (last === null || last === undefined) return null
+    const outcome = last.outcome.startsWith('system-refused')
+      ? tr('config.diag.refused')
+      : last.outcome === 'system'
+        ? last.shown === true
+          ? tr('config.diag.systemShown')
+          : last.shown === false
+            ? tr('config.diag.systemFailed')
+            : tr('config.diag.systemUnconfirmed')
+        : last.outcome === 'replay'
+          ? tr('config.diag.replayDelivery')
+          : tr('config.diag.popup')
+    return { at: last.at, outcome, title: last.title ?? '' }
+  }
+
+  /** How many away-channel alerts are still waiting for the user to come back. */
+  const replayValue = (count, tr) => (
+    count === 0 ? tr('config.diag.replayNone') : tr('config.diag.replayValue', { count })
+  )
+
+  return { copyFor, deliveryFacts, replayValue }
+}
@@ -0,0 +1,146 @@
+/**
+ * Delivery: choose exactly one channel for one alert, at the moment the alert
+ * is owed, and record what happened.
+ *
+ * @module @dsh-plugin/session-notify/client/core/delivery
+ */
+
+import { SETTLE_MS, THROTTLE_MS } from '../constants.js'
+import { windowIsAway } from '../platform.js'
+import { isOnScreen, stillOwed } from './session.js'
+
+/**
+ * Build the delivery path.
+ * @param deps - the plugin store; the shared `live` cell the observer writes and
+ *   this path reads at delivery time; the copy table; the popup stack; the
+ *   system channel; and the replay queue.
+ * @returns the delivery operations, the settle runner, and the throttle reset a
+ *   window transition needs.
+ */
+export function createDelivery({ store, copy, live, toasts, system, replay }) {
+  const pending = []
+  let settleTimer = 0
+  let lastDelivery = 0
+  let deliverySeq = 0
+
+  /**
+   * Record what actually happened to the newest alert.
+   *
+   * Everything on the delivery path used to fail invisibly: the alert simply
+   * never appeared, with no way to tell a wrong channel decision from a
+   * refused constructor. The config page shows this record, so the next
+   * question ("did it even try?") has an answer.
+   *
+   * The time is the user's own clock, not UTC: a log line the reader has to
+   * translate by eight hours is worse than no log line.
+   * @param outcome - which channel carried the alert, or why it fell back.
+   * @param candidate - the alert being recorded.
+   * @param monitor - the system channel's own record, when that is the channel.
+   * @returns the stored record, so a later platform answer can update it.
+   */
+  const recordDelivery = (outcome, candidate, monitor) => {
+    deliverySeq += 1
+    const now = new Date()
+    const pad = (value) => String(value).padStart(2, '0')
+    const record = {
+      seq: deliverySeq,
+      outcome,
+      at: `${pad(now.getHours())}:${pad(now.getMinutes())}:${pad(now.getSeconds())}`,
+      title: copy.copyFor(candidate).title,
+      shown: monitor?.shown,
+      monitor,
+    }
+    store.set({ ...store.getSnapshot(), lastDelivery: record })
+    return record
+  }
+
+  /**
+   * Deliver one candidate through exactly one channel: the system
+   * notification while the window is away, the light popup while it is in
+   * front, and nothing at all for the conversation on screen.
+   *
+   * The channel decision reads the window state right here, at delivery time,
+   * instead of trusting the state the observer last remembered — that is what
+   * an unreported blur used to defeat. An alert that leaves through the system
+   * channel is additionally held for an in-app replay, because a desktop banner
+   * raised while nobody is looking at the machine is a notification the user
+   * never actually receives.
+   * @param candidate - the alert to deliver.
+   * @param ignoreThrottle - deliver immediately, bypassing the flood guard.
+   * @returns `false` when the flood guard suppressed this alert, `true` when the
+   *   delivery path itself ran (including a deliberate skip for the conversation
+   *   on screen).
+   */
+  const deliver = (candidate, ignoreThrottle) => {
+    if (ignoreThrottle !== true) {
+      const now = Date.now()
+      if (now - lastDelivery < THROTTLE_MS) return false
+      lastDelivery = now
+    }
+    if (!windowIsAway()) {
+      if (isOnScreen(candidate.sessionId, live.list)) return true
+      toasts.showToast(candidate)
+      recordDelivery('popup', candidate)
+      return true
+    }
+    const result = system.notifySystem(candidate, candidate.test === true)
+    if (result.outcome === 'raised') {
+      recordDelivery('system', candidate, result)
+      if (candidate.test !== true) replay.holdForReplay(candidate, result)
+      return true
+    }
+    // A test alert still has to reach the user, and so does a real one when
+    // the system channel refuses: the popup is the channel that remains.
+    toasts.showToast(candidate)
+    recordDelivery(`system-refused-${result.outcome}`, candidate)
+    return true
+  }
+
+  /**
+   * Take the delivery decision on a later tick, from the freshest state.
+   *
+   * One candidate per tick keeps the throttle meaningful, and anything still
+   * queued arms its own follow-up tick — a burst used to leave every candidate
+   * after the first stranded in the queue with no timer to flush it.
+   *
+   * A pending interaction the flood guard holds back is put back in the queue
+   * instead of being dropped: only the user can clear it, so it stays owed, and
+   * the next tick retries it. Flood control still drops the completions it was
+   * written for.
+   */
+  const flushSettle = () => {
+    settleTimer = 0
+    const candidate = pending.shift()
+    if (candidate !== undefined && stillOwed(candidate, live)) {
+      const delivered = deliver(candidate, false)
+      if (delivered === false && candidate.pendingKind !== '') pending.push(candidate)
+    }
+    if (pending.length > 0) settleTimer = setTimeout(() => flushSettle(), SETTLE_MS)
+  }
+
+  /** Hold one candidate for the settle tick, collapsing a burst onto one timer. */
+  const queue = (candidate) => {
+    pending.push(candidate)
+    if (settleTimer !== 0) return
+    settleTimer = setTimeout(() => flushSettle(), SETTLE_MS)
+  }
+
+  /**
+   * Clear the flood guard. A window that just lost or regained the foreground is
+   * exactly when the next alert matters most, so it must never be swallowed by a
+   * delivery from the other side of that transition.
+   */
+  const resetThrottle = () => {
+    lastDelivery = 0
+  }
+
+  /** Stop the pending settle tick: the plugin is being disposed. */
+  const dispose = () => {
+    if (settleTimer !== 0) {
+      clearTimeout(settleTimer)
+      settleTimer = 0
+    }
+  }
+
+  return { deliver, recordDelivery, queue, flushSettle, resetThrottle, dispose }
+}
@@ -0,0 +1,19 @@
+/**
+ * Diagnostics: one way to render an unknown failure, one way to log it.
+ *
+ * @module @dsh-plugin/session-notify/client/core/log
+ */
+
+/** Render one unknown failure as text. */
+export function text(error) {
+  return error instanceof Error ? error.message : String(error)
+}
+
+/** Log one contained diagnostic through the package-tagged console. */
+export function report(message) {
+  try {
+    console.error(`session-notify: ${message}`)
+  } catch {
+    /* a diagnostic never fails the plugin */
+  }
+}
@@ -0,0 +1,113 @@
+/**
+ * Observation: one derivation pass over the client's own session state.
+ *
+ * @module @dsh-plugin/session-notify/client/core/observe
+ */
+
+import { questionText, servedPendingKind, titleOf } from './session.js'
+import { report } from './log.js'
+
+/**
+ * Build the observer.
+ * @param deps - the plugin store; the shared `live` cell the delivery path reads
+ *   back at delivery time; and `queue`, which holds a derived alert for the
+ *   settle tick.
+ * @returns the derivation pass, and the health publisher the slot entry reports
+ *   its own state through.
+ */
+export function createObservation({ store, live, queue }) {
+  const runs = new Map()
+  const completionNotice = new Set()
+  const pendingNotice = new Map()
+
+  /**
+   * Publish the resident observer's own health into the plugin store.
+   *
+   * A slot entry that silently receives nothing is the one failure this plugin
+   * cannot detect from the outside, so the observer records whether it is
+   * actually seeing session state and the settings row shows it. Repeated
+   * identical states publish nothing, and a state this is not `watching` also
+   * reaches the tagged console.
+   * @param next - the health state observed on this render.
+   */
+  const reportHealth = (next) => {
+    const snapshot = store.getSnapshot()
+    const current = snapshot.health
+    if (current.state === next.state && current.message === next.message) return
+    if (current.state !== 'watching') report(`observer health: ${next.state} ${next.message}`)
+    store.set({ ...snapshot, health: next })
+  }
+
+  /**
+   * One derivation pass over the client's own session state: remember the
+   * freshest snapshot for the settle tick, compare it against what this page
+   * already observed, emit at most one candidate per transition, and let the
+   * settle tick decide delivery. The window state is deliberately NOT captured
+   * here — the delivery reads it fresh, because it can change inside the
+   * settle window.
+   * @param list - the client's session-list snapshot.
+   * @param status - the client's per-session status selector.
+   */
+  const observe = (list, status) => {
+    if (list === undefined || status === undefined) return
+    live.list = list
+    live.status = status
+    const kinds = store.getSnapshot().kinds
+    for (const sessionId of Object.keys(list.byId ?? {})) {
+      const summary = list.byId[sessionId]
+      if (summary === undefined || summary.origin === 'subagent') continue
+      const sessionStatus = status.get(sessionId)
+      const running = sessionStatus?.running ?? summary.running
+
+      if (running === true) {
+        runs.set(sessionId, true)
+        completionNotice.delete(sessionId)
+      } else {
+        if (runs.get(sessionId) === true) {
+          runs.set(sessionId, false)
+          if (summary.blank !== true && !completionNotice.has(sessionId) && kinds.completion) {
+            completionNotice.add(sessionId)
+            queue({
+              kind: 'completion',
+              sessionId,
+              title: titleOf(summary, sessionId),
+              detail: '',
+              pendingKind: '',
+            })
+          }
+        } else if (!runs.has(sessionId)) {
+          runs.set(sessionId, false)
+        }
+      }
+
+      const interaction = sessionStatus?.pendingInteraction
+      const pendingKind = servedPendingKind(interaction)
+      if (pendingKind === undefined) {
+        pendingNotice.delete(sessionId)
+        continue
+      }
+      if (pendingNotice.get(sessionId) === pendingKind) continue
+      pendingNotice.set(sessionId, pendingKind)
+      const trigger = pendingKind === 'approval' ? 'approval' : 'question'
+      if (!kinds[trigger]) continue
+      queue({
+        kind: trigger,
+        sessionId,
+        title: titleOf(summary, sessionId),
+        detail: pendingKind === 'approval'
+          ? String(interaction?.toolName ?? '')
+          : questionText(interaction),
+        pendingKind,
+      })
+    }
+
+    for (const sessionId of [...runs.keys()]) {
+      if (list.byId?.[sessionId] !== undefined) continue
+      runs.delete(sessionId)
+      completionNotice.delete(sessionId)
+      pendingNotice.delete(sessionId)
+    }
+  }
+
+  return { observe, reportHealth }
+}
@@ -0,0 +1,85 @@
+/**
+ * Replaying, in-app, the alerts the system channel carried while nobody was
+ * looking at the machine.
+ *
+ * @module @dsh-plugin/session-notify/client/core/replay
+ */
+
+import { REPLAY_LIMIT, REPLAY_QUIET_MS, REPLAY_TTL_MS, TOAST_LIMIT } from '../constants.js'
+
+/**
+ * Build the replay queue.
+ * @param deps - the plugin store; `publish` so the settings row can count what
+ *   is waiting; `showToast` for the in-app surface; and `recordDelivery`, which
+ *   belongs to the delivery module and is reached through the composition root's
+ *   late-bound runtime (this queue is built before that module exists).
+ * @returns the queue's operations plus the current depth.
+ */
+export function createReplay({ store, publish, showToast, recordDelivery }) {
+  let entries = []
+
+  /** Forget one queued replay: the user has just answered that alert in the system channel. */
+  const dropReplay = (candidate) => {
+    const next = entries.filter((entry) => (
+      entry.candidate.sessionId !== candidate.sessionId || entry.candidate.kind !== candidate.kind
+    ))
+    if (next.length === entries.length) return
+    entries = next
+    publish()
+  }
+
+  /**
+   * Keep one away-channel alert for an in-app replay.
+   *
+   * A desktop notification raised while nobody is looking at the machine is
+   * easy to miss: its banner lives a few seconds, its history lives in the
+   * system's own notification centre, which the user may never open, and a
+   * refused display leaves no trace at all on the page. The alert is therefore
+   * replayed as a light in-app popup as soon as the window is back in the
+   * foreground, except when the platform confirmed the banner and the user was
+   * back within {@link REPLAY_QUIET_MS} — then the banner is still on screen and
+   * a second surface would only be noise. Entries older than
+   * {@link REPLAY_TTL_MS} are dropped instead of waiting for a user who has
+   * moved on.
+   * @param candidate - the alert to keep for a replay.
+   * @param monitor - the system channel's own record, so its confirmation can be read later.
+   */
+  const holdForReplay = (candidate, monitor) => {
+    const now = Date.now()
+    entries = [
+      ...entries.filter((entry) => (
+        entry.candidate.sessionId !== candidate.sessionId || entry.candidate.kind !== candidate.kind
+      )),
+      { candidate, at: now, monitor },
+    ].slice(-REPLAY_LIMIT)
+    publish()
+  }
+
+  /** Show every away-channel alert the user has not had a chance to see yet. */
+  const flushReplay = () => {
+    if (entries.length === 0) return
+    const now = Date.now()
+    const waiting = entries
+    entries = []
+    const due = waiting.filter((entry) => {
+      if (now - entry.at > REPLAY_TTL_MS) return false
+      // A banner that the platform confirmed and that is still inside its own
+      // visible window has already told the user; do not say it twice.
+      return !(entry.monitor?.shown === true && now - entry.at <= REPLAY_QUIET_MS)
+    })
+    const shown = due.slice(-TOAST_LIMIT)
+    for (const entry of shown) showToast(entry.candidate)
+    if (shown.length > 0) recordDelivery('replay', shown[shown.length - 1].candidate)
+    else publish()
+  }
+
+  /** How many alerts are still waiting for the user to come back. */
+  const size = () => entries.length
+
+  /** Forget everything: the plugin is being disposed. */
+  const dispose = () => {
+    entries = []
+  }
+
+  return { holdForReplay, dropReplay, flushReplay, size, dispose }
+}
@@ -0,0 +1,97 @@
+/**
+ * Reading the client's own session state: the pure derivations the observer
+ * and the delivery path both ask questions of.
+ *
+ * @module @dsh-plugin/session-notify/client/core/session
+ */
+
+import { PENDING_KINDS } from '../constants.js'
+
+/**
+ * Discriminate a pending interaction the client published.
+ *
+ * The domains that can ask the user something are `@deepseek-ai/dsh-client-ui-approval`
+ * (a tool authorisation) and `@deepseek-ai/dsh-client-ui-user-questions` (a
+ * question batch, or the plan review its `planReviewOf` marks); each publishes a
+ * literal `kind` on its pending value. Anything else is ignored rather than
+ * guessed at.
+ * @param value - `status.pendingInteraction`.
+ * @returns a served kind, or undefined.
+ */
+export function servedPendingKind(value) {
+  if (value === undefined || value === null || typeof value !== 'object') return undefined
+  const kind = value.kind
+  return typeof kind === 'string' && PENDING_KINDS.includes(kind) ? kind : undefined
+}
+
+/** Trim free text down to one popup line. */
+export function preview(value) {
+  if (typeof value !== 'string') return ''
+  const flat = value.replace(/\s+/g, ' ').trim()
+  return flat.length > 80 ? `${flat.slice(0, 79)}…` : flat
+}
+
+/** The first question text a pending interaction exposes, across its shapes. */
+export function questionText(interaction) {
+  if (interaction === null || typeof interaction !== 'object') return ''
+  const first = Array.isArray(interaction.questions) ? interaction.questions[0] : undefined
+  if (typeof first?.question === 'string') return preview(first.question)
+  if (typeof first?.text === 'string') return preview(first.text)
+  if (typeof interaction.question === 'string') return preview(interaction.question)
+  if (typeof interaction.prompt === 'string') return preview(interaction.prompt)
+  return preview(interaction.displayReason?.text ?? interaction.reason?.text ?? '')
+}
+
+/** Copy one session title, falling back to its identity. */
+export function titleOf(summary, sessionId) {
+  const title = typeof summary?.title === 'string' ? summary.title.trim() : ''
+  return title === '' ? sessionId.slice(0, 8) : title
+}
+
+/** Whether the user is looking at this exact conversation right now. */
+export function isOnScreen(sessionId, list) {
+  if (list === undefined) return false
+  for (const id of Object.keys(list.byId ?? {})) {
+    const summary = list.byId[id]
+    if (summary !== undefined && (summary.retainedBy?.mainView ?? 0) > 0) return id === sessionId
+  }
+  return false
+}
+
+/**
+ * Whether a queued candidate is still owed, read from the LIVE snapshot rather
+ * than the one captured when the transition was seen.
+ *
+ * The two triggers are owed for different reasons, so they are checked for
+ * different things:
+ *
+ * - A **pending interaction** (approval, question, plan review) is owed until
+ *   the user answers it. It is deliberately NOT gated on the run state: the
+ *   session is `running` while it waits — the client's own `observeRunning`
+ *   only mirrors `api-session/status` and says nothing about a pending request —
+ *   so a running gate would silently drop every approval and question alert.
+ * - A **completion** is owed only while the conversation stayed idle. A
+ *   conversation that resumed inside the settle window owes no alert, and the
+ *   snapshot the transition was derived from still carries the pre-transition
+ *   `running` flag of the session record.
+ * @param candidate - the alert waiting for its settle tick.
+ * @param live - the freshest `{ list, status }` the observer has seen.
+ * @returns whether the alert is still owed.
+ */
+export function stillOwed(candidate, live) {
+  if (candidate.test === true) return true
+
+  if (candidate.pendingKind !== '') {
+    const sessionStatus = live.status?.get?.(candidate.sessionId)
+    // No status entry contradicts the request, so it is still the user's move.
+    if (sessionStatus === undefined) return true
+    return servedPendingKind(sessionStatus.pendingInteraction) === candidate.pendingKind
+  }
+
+  const list = live.list
+  if (list === undefined) return true
+  const summary = list.byId?.[candidate.sessionId]
+  if (summary === undefined) return true
+  const running = live.status?.get?.(candidate.sessionId)?.running ?? summary.running
+  return running !== true
+}
@@ -0,0 +1,87 @@
+/**
+ * This package's browser-local preferences: the three trigger switches and the
+ * in-app popup lifetime.
+ *
+ * They are browser preferences rather than cordis configuration, so they live in
+ * this origin's own storage instead of the profile's patch file: the plugin
+ * writes nothing into DSH's configuration. Every read is defensive, because
+ * storage can be unavailable or hold what an older version wrote, and every
+ * write merges into the stored object so that setting one preference never
+ * clears another.
+ *
+ * @module @dsh-plugin/session-notify/client/core/storage
+ */
+
+import { DISMISS_CHOICES, KINDS, TOAST_DURATION_MS } from '../constants.js'
+
+/** Storage key for this package's own preferences. */
+export const STORAGE_KEY = 'dsh-plugin/session-notify'
+
+/** Every preference, at the value a browser that has never seen this plugin uses. */
+function defaults() {
+  return { completion: true, approval: true, question: true, dismissAfterMs: TOAST_DURATION_MS }
+}
+
+/**
+ * Read the stored preferences, one field at a time.
+ *
+ * A field is only taken when it has the shape this version understands: a
+ * boolean per trigger, and a popup lifetime from {@link DISMISS_CHOICES}. Anything
+ * else keeps the default, so a foreign or older value can never produce a state
+ * the plugin cannot render.
+ * @returns the effective preferences.
+ */
+function readStored() {
+  const preferences = defaults()
+  try {
+    const raw = globalThis.localStorage?.getItem(STORAGE_KEY)
+    if (typeof raw !== 'string' || raw === '') return preferences
+    const stored = JSON.parse(raw)
+    for (const kind of KINDS) {
+      if (typeof stored?.[kind] === 'boolean') preferences[kind] = stored[kind]
+    }
+    if (DISMISS_CHOICES.includes(stored?.dismissAfterMs)) preferences.dismissAfterMs = stored.dismissAfterMs
+  } catch {
+    /* unreadable or foreign storage keeps the defaults */
+  }
+  return preferences
+}
+
+/** Write a patch over the stored preferences, keeping every field the patch does not name. */
+function writeStored(patch) {
+  try {
+    globalThis.localStorage?.setItem(STORAGE_KEY, JSON.stringify({ ...readStored(), ...patch }))
+  } catch {
+    /* a refused write leaves the preference live for this page only */
+  }
+}
+
+/**
+ * Read this package's stored trigger switches.
+ * @returns the stored switches, defaulting to everything on.
+ */
+export function readStoredKinds() {
+  const { completion, approval, question } = readStored()
+  return { completion, approval, question }
+}
+
+/** Store one trigger switch, ignoring storage that refuses to write. */
+export function writeStoredKinds(kinds) {
+  writeStored(kinds)
+}
+
+/**
+ * Read the stored in-app popup lifetime.
+ * @returns milliseconds before a card closes itself, or `0` for "never".
+ */
+export function readStoredDismissMs() {
+  return readStored().dismissAfterMs
+}
+
+/**
+ * Store the popup lifetime the user picked.
+ * @param ms - milliseconds, or `0` for "never auto-close".
+ */
+export function writeStoredDismissMs(ms) {
+  writeStored({ dismissAfterMs: ms })
+}
@@ -0,0 +1,25 @@
+/**
+ * The plugin's own observable state.
+ *
+ * @module @dsh-plugin/session-notify/client/core/store
+ */
+
+/** Minimal observable store: the shape React reads with useSyncExternalStore. */
+export function createStore(initial) {
+  let value = initial
+  const listeners = new Set()
+  return {
+    getSnapshot: () => value,
+    subscribe: (listener) => {
+      listeners.add(listener)
+      return () => {
+        listeners.delete(listener)
+      }
+    },
+    set: (next) => {
+      if (next === value) return
+      value = next
+      for (const listener of [...listeners]) listener()
+    },
+  }
+}
@@ -0,0 +1,112 @@
+/**
+ * The system-notification channel: raising one, and reporting what the platform
+ * actually did with it.
+ *
+ * @module @dsh-plugin/session-notify/client/core/system-channel
+ */
+
+import { RAISED_LIMIT } from '../constants.js'
+import { focusWindow, notificationPermission, systemIcon } from '../platform.js'
+import { text } from './log.js'
+
+/**
+ * Build the system channel over one store.
+ * @param deps - the plugin store; the copy table; `notify` for contained
+ *   diagnostics; `openSession` for a click that must land on the conversation;
+ *   and `dropReplay`, so clicking the banner cancels its in-app replay.
+ * @returns the channel's operations.
+ */
+export function createSystemChannel({ store, copy, notify, openSession, dropReplay }) {
+  /** System notifications this page still holds open, so nothing collects them mid-display. */
+  const raised = new Set()
+
+  /**
+   * The system-notification channel's own answer about one notification.
+   *
+   * A browser reports the platform's verdict asynchronously: `show` means the
+   * notification reached the desktop, `error` means the platform refused it, and
+   * silence means neither answer arrived. That third case is the one that used to
+   * lose alerts silently, so it is recorded rather than assumed to be a success.
+   * @param monitor - the record returned by {@link notifySystem} for this notification.
+   * @param shown - `true` when the platform displayed it, `false` when it refused.
+   */
+  const confirmDelivery = (monitor, shown) => {
+    if (monitor === null || monitor === undefined || typeof monitor !== 'object') return
+    monitor.shown = shown
+    const snapshot = store.getSnapshot()
+    const last = snapshot.lastDelivery
+    if (last === null || last === undefined || last.monitor !== monitor || last.shown === shown) return
+    store.set({ ...snapshot, lastDelivery: { ...last, shown } })
+  }
+
+  /** Hold one raised notification open, bounded, so it cannot be collected while pending. */
+  const keepRaised = (notification) => {
+    raised.add(notification)
+    while (raised.size > RAISED_LIMIT) {
+      const oldest = raised.values().next().value
+      if (oldest === undefined) break
+      raised.delete(oldest)
+    }
+  }
+
+  /**
+   * Raise one system notification, tolerating every refusal a browser may give,
+   * and report what the platform said about it.
+   * @param candidate - the alert to raise.
+   * @param force - raise it even when the permission is not granted (the settings
+   *   page's own test button, which exists to prove the channel on its own).
+   * @returns a record whose `outcome` is the channel's verdict (`raised`,
+   *   `permission`, `unsupported`, or `threw`) and whose `shown` is filled in
+   *   later by {@link confirmDelivery} — `true` displayed, `false` refused,
+   *   `undefined` while the platform has said nothing.
+   */
+  const notifySystem = (candidate, force) => {
+    const Ctor = globalThis.Notification
+    const permission = notificationPermission()
+    if (permission === 'unsupported') return { outcome: 'unsupported' }
+    if (!force && permission !== 'granted') return { outcome: 'permission' }
+    try {
+      const notice = copy.copyFor(candidate)
+      const options = {
+        body: notice.body,
+        tag: `dsh-session-${candidate.sessionId}`,
+        requireInteraction: false,
+      }
+      if (systemIcon !== undefined) options.icon = systemIcon
+      const notification = new Ctor(notice.title, options)
+      const record = { outcome: 'raised', notice, shown: undefined }
+      keepRaised(notification)
+      notification.onshow = () => {
+        confirmDelivery(record, true)
+      }
+      notification.onerror = (event) => {
+        confirmDelivery(record, false)
+        notify(`system notification was refused: ${String(event?.message ?? 'unknown')}`)
+      }
+      notification.onclose = () => {
+        raised.delete(notification)
+      }
+      notification.onclick = () => {
+        dropReplay(candidate)
+        focusWindow()
+        openSession(candidate.sessionId)
+        try {
+          notification.close()
+        } catch {
+          /* close is best effort on every platform */
+        }
+      }
+      return record
+    } catch (error) {
+      notify(`system notification failed: ${text(error)}`)
+      return { outcome: 'threw' }
+    }
+  }
+
+  /** Drop the held references: the plugin is being disposed. */
+  const dispose = () => {
+    raised.clear()
+  }
+
+  return { notifySystem, confirmDelivery, dispose }
+}
@@ -0,0 +1,117 @@
+/**
+ * The light in-app popup stack: its lifetime, its ordering, and its bound.
+ *
+ * The lifetime is the user's, read from the store at the moment a card is armed:
+ * the settings page offers a few delays plus "never", and re-arming after a hover
+ * picks the current choice up. `0` means the card waits for the user instead of a
+ * timer.
+ *
+ * @module @dsh-plugin/session-notify/client/core/toasts
+ */
+
+import { TOAST_DURATION_MS, TOAST_LIMIT } from '../constants.js'
+
+/**
+ * Build the popup stack over one store.
+ * @param deps - the plugin store, and the copy table a candidate is rendered with.
+ * @returns the stack's operations, including the three the popup element calls back into.
+ */
+export function createToastStack({ store, copy }) {
+  const timers = new Map()
+  /** Cards the pointer is resting on: they carry no timer until it leaves. */
+  const held = new Set()
+  let seq = 0
+
+  /** The configured lifetime, falling back to the default for a value this version cannot use. */
+  const lifetime = () => {
+    const configured = store.getSnapshot().dismissAfterMs
+    return typeof configured === 'number' && configured >= 0 ? configured : TOAST_DURATION_MS
+  }
+
+  /** Drop one popup and cancel its lifetime timer. */
+  const closeToast = (id) => {
+    held.delete(id)
+    const timer = timers.get(id)
+    if (timer !== undefined) {
+      clearTimeout(timer)
+      timers.delete(id)
+    }
+    const snapshot = store.getSnapshot()
+    if (!snapshot.toasts.some((toast) => toast.id === id)) return
+    store.set({ ...snapshot, toasts: snapshot.toasts.filter((toast) => toast.id !== id) })
+  }
+
+  /**
+   * Arm one popup's lifetime; hovering calls `hold` first, then this again.
+   * A lifetime of `0` arms nothing: the card stays until it is dismissed.
+   */
+  const armToast = (id) => {
+    held.delete(id)
+    const timer = timers.get(id)
+    if (timer !== undefined) clearTimeout(timer)
+    timers.delete(id)
+    const duration = lifetime()
+    if (duration === 0) return
+    timers.set(id, setTimeout(() => closeToast(id), duration))
+  }
+
+  /** Pause one popup's lifetime while the pointer rests on it. */
+  const holdToast = (id) => {
+    held.add(id)
+    const timer = timers.get(id)
+    if (timer === undefined) return
+    clearTimeout(timer)
+    timers.delete(id)
+  }
+
+  /**
+   * Apply the current lifetime to the cards already on screen.
+   *
+   * Changing the setting restarts the countdown for what is visible — otherwise
+   * a card raised under the old lifetime would still close on the old schedule.
+   * A held card is left alone: the pointer is on it, so nothing may close it.
+   */
+  const rearmAll = () => {
+    for (const toast of store.getSnapshot().toasts) {
+      if (!held.has(toast.id)) armToast(toast.id)
+    }
+  }
+
+  /**
+   * Show one light in-app popup: the trigger as the title, the conversation
+   * and its detail as the description, so the heading says what happened and
+   * the line under it says where.
+   */
+  const showToast = (candidate) => {
+    const notice = copy.copyFor(candidate)
+    seq += 1
+    const toast = {
+      id: `dsn-${String(seq)}`,
+      kind: notice.kind,
+      title: notice.title,
+      body: notice.body,
+      sessionId: candidate.sessionId,
+    }
+    const snapshot = store.getSnapshot()
+    const next = [toast, ...snapshot.toasts]
+    for (const dropped of next.slice(TOAST_LIMIT)) {
+      const timer = timers.get(dropped.id)
+      if (timer !== undefined) {
+        clearTimeout(timer)
+        timers.delete(dropped.id)
+      }
+      held.delete(dropped.id)
+    }
+    store.set({ ...snapshot, toasts: next.slice(0, TOAST_LIMIT) })
+    armToast(toast.id)
+  }
+
+  /** Cancel every lifetime timer: the plugin is being disposed, so nothing may fire later. */
+  const dispose = () => {
+    for (const timer of timers.values()) clearTimeout(timer)
+    timers.clear()
+    held.clear()
+  }
+
+  return { showToast, closeToast, armToast, holdToast, rearmAll, dispose }
+}
@@ -0,0 +1,74 @@
+/**
+ * English dictionary of this package's own copies.
+ *
+ * The key set must stay identical to `zh.js`: `createTranslator` falls back to
+ * whichever dictionary has the key, so an asymmetric key would silently change
+ * language rather than fail loudly.
+ *
+ * @module @dsh-plugin/session-notify/client/i18n/en
+ */
+
+export const en = {
+  'notification.completion': 'Conversation finished',
+  'notification.approval': 'Approval required',
+  'notification.question': 'Answer needed',
+  'body.approval': '{title}: {tool} is waiting for your approval',
+  'body.approvalPlain': '{title}: a tool is waiting for your approval',
+  'body.question': '{title}: waiting for your answer',
+  'body.planReview': '{title}: a plan is waiting for your review',
+  'body.untitled': 'Untitled conversation',
+  'toast.view': 'View',
+  'toast.dismiss': 'Dismiss',
+  'settings.description': 'A system notification while the window is in the background, a light in-app popup while it is in the foreground; the conversation on screen is never interrupted.',
+  'settings.permission.granted': 'System notifications are on',
+  'settings.permission.default': 'System notification permission has not been granted',
+  'settings.permission.denied': 'System notifications are switched off in system settings',
+  'settings.permission.unsupported': 'This environment cannot show system notifications; the in-app popup still works',
+  'settings.permission.hint.plain': 'Allow DeepSeek Harness in your system notification settings',
+  'settings.permission.hint.win': 'Windows Settings → System → Notifications → DeepSeek Harness',
+  'settings.permission.hint.mac': 'System Settings → Notifications → DeepSeek Harness',
+  'settings.permission.hint.linux': 'Allow DeepSeek Harness in your desktop notification settings (GNOME / KDE)',
+  'settings.action.allow': 'Allow notifications',
+  'settings.action.testSystem': 'Test system notification',
+  'settings.action.testAny': 'Test alert',
+  'settings.action.unsupported': 'Unavailable',
+  'settings.permission.promptFailed': 'Could not request notification permission: {message}',
+  'settings.health.watching': 'Watching session status',
+  'settings.health.noHooks': 'No session status received (notifications will not fire)',
+  'settings.health.error': 'Watching session status failed: {message}',
+  'settings.health.starting': 'Waiting for the session list',
+  'settings.kind.completion': 'Finished',
+  'settings.kind.approval': 'Approval',
+  'settings.kind.question': 'Questions',
+  'settings.dismiss.label': 'Auto-close',
+  'settings.dismiss.3000': '3s',
+  'settings.dismiss.6000': '6s',
+  'settings.dismiss.10000': '10s',
+  'settings.dismiss.30000': '30s',
+  'settings.dismiss.0': 'Never',
+  'config.section.kinds': 'What to notify about',
+  'config.section.popup': 'Popup',
+  'config.section.permission': 'System notification permission',
+  'config.section.status': 'Status',
+  'config.intro': 'Every alert comes from this page: a system notification while the window is in the background, the light popup here while it is in the foreground.',
+  'config.saveNote': 'The switches are stored in this browser and survive reinstalling the plugin.',
+  'config.dismiss.note': 'Hovering a card pauses the countdown; with Never, close each one with ✕ or Esc.',
+  'config.testHint': 'The buttons here go straight to the system channel, so you can verify it on its own (they fire even while the window is in front).',
+  'config.testAny': 'Test alert',
+  'config.testSystem': 'Test system notification',
+  'config.diag.window': 'Window',
+  'config.diag.watch': 'Session watch',
+  'config.diag.inFront': 'in front (popup is used)',
+  'config.diag.away': 'not in front (system notification is used)',
+  'config.diag.last': 'Last delivery',
+  'config.diag.none': 'nothing delivered yet',
+  'config.diag.systemShown': 'system notification (confirmed on screen)',
+  'config.diag.systemUnconfirmed': 'system notification (no confirmation, replayed in-app on return)',
+  'config.diag.systemFailed': 'system notification never appeared, replayed in-app on return',
+  'config.diag.replayDelivery': 'in-app popup (replayed when you came back)',
+  'config.diag.popup': 'in-app popup',
+  'config.diag.refused': 'system channel refused, popup was used instead',
+  'config.diag.replay': 'Replay',
+  'config.diag.replayValue': '{count} waiting',
+  'config.diag.replayNone': 'None',
+}
@@ -0,0 +1,73 @@
+/**
+ * This package's translation seat: the dictionaries it registers with the
+ * framework's locale service, and the translator every copy path goes through.
+ *
+ * @module @dsh-plugin/session-notify/client/i18n
+ */
+
+import { NS } from '../constants.js'
+import { zh } from './zh.js'
+import { en } from './en.js'
+
+/** Every dictionary this package ships, keyed by the locale service's own id. */
+export const dictionaries = { zh, en }
+
+/**
+ * Register this package's dictionaries with the locale service.
+ *
+ * Without this the service has no entry for the namespace and every
+ * `locale.bind(NS)` lookup answers with the key itself, so the settings row
+ * shows `settings.title` instead of its copy. The typed form takes every
+ * shipped locale in one call, and the older single-locale form stays
+ * supported as a fallback. Registration bumps the locale revision, so
+ * already-rendered entries pick the copy up without a reload.
+ * @param locale - the locale service, or undefined when this profile has none.
+ * @returns a disposer for whichever registrations were installed.
+ */
+export function registerDictionaries(locale) {
+  if (locale === undefined || typeof locale.register !== 'function') return () => {}
+  try {
+    return locale.register(NS, dictionaries)
+  } catch {
+    const disposers = Object.entries(dictionaries).map(([id, dict]) => locale.register(NS, id, dict))
+    return () => {
+      for (const dispose of disposers) dispose?.()
+    }
+  }
+}
+
+/**
+ * Build a translate function for one locale service: the service's own bound
+ * namespace first, then this package's dictionaries, then the key itself, so
+ * a missing seat degrades copy instead of rendering.
+ * @param locale - the locale service, or undefined when this profile has none.
+ * @returns a translate function with `{ name }` interpolation.
+ */
+export function createTranslator(locale) {
+  return (key, params) => {
+    if (locale !== undefined && typeof locale.bind === 'function') {
+      try {
+        const bound = locale.bind(NS)
+        if (typeof bound === 'function') {
+          const translated = bound(key, params)
+          if (typeof translated === 'string' && translated !== key) return translated
+        }
+      } catch {
+        /* a locale service without this namespace still renders the fallback */
+      }
+    }
+    let language = ''
+    try {
+      const snapshot = locale?.getSnapshot?.()
+      language = String(snapshot?.active ?? '')
+    } catch {
+      language = ''
+    }
+    const dictionary = /^zh/i.test(language) ? zh : en
+    const template = dictionary[key] ?? zh[key] ?? en[key] ?? key
+    if (params === undefined) return template
+    return template.replace(/\{(\w+)\}/g, (match, name) => (
+      Object.prototype.hasOwnProperty.call(params, name) ? String(params[name]) : match
+    ))
+  }
+}
@@ -0,0 +1,74 @@
+/**
+ * Chinese dictionary of this package's own copies.
+ *
+ * Every key here is read through `createTranslator`, and the key set must match
+ * `en.js` exactly — a dead or half-translated key is a defect, not a fallback
+ * (v1.0.4 removed two of them). The locale service gets the same two objects.
+ *
+ * @module @dsh-plugin/session-notify/client/i18n/zh
+ */
+
+export const zh = {
+  'notification.completion': '会话已完成',
+  'notification.approval': '需要授权',
+  'notification.question': '需要回答',
+  'body.approval': '{title}：工具 {tool} 正在等待你的授权',
+  'body.approvalPlain': '{title}：有工具正在等待你的授权',
+  'body.question': '{title}：正在等待你的回答',
+  'body.planReview': '{title}：计划正在等待你确认',
+  'body.untitled': '未命名会话',
+  'toast.view': '查看',
+  'toast.dismiss': '关闭',
+  'settings.description': '窗口不在前台时用系统通知，窗口在前台时用应用内轻弹窗；正在看的那个会话完成后不打扰。',
+  'settings.permission.granted': '系统通知已开启',
+  'settings.permission.default': '尚未授予系统通知权限',
+  'settings.permission.denied': '系统通知已被系统设置关闭',
+  'settings.permission.unsupported': '当前环境不支持系统通知，仍会显示应用内轻弹窗',
+  'settings.permission.hint.plain': '请在系统通知设置中允许 DeepSeek Harness',
+  'settings.permission.hint.win': 'Windows 设置 → 系统 → 通知 → DeepSeek Harness',
+  'settings.permission.hint.mac': '系统设置 → 通知 → DeepSeek Harness',
+  'settings.permission.hint.linux': '在桌面环境的通知设置（GNOME / KDE）中允许 DeepSeek Harness',
+  'settings.action.allow': '允许通知',
+  'settings.action.testSystem': '测试系统通知',
+  'settings.action.testAny': '测试提醒',
+  'settings.action.unsupported': '不可用',
+  'settings.permission.promptFailed': '无法请求通知权限：{message}',
+  'settings.health.watching': '正在监听会话状态',
+  'settings.health.noHooks': '未收到会话状态（通知不会触发）',
+  'settings.health.error': '监听会话状态出错：{message}',
+  'settings.health.starting': '正在等待会话列表',
+  'settings.kind.completion': '完成',
+  'settings.kind.approval': '授权',
+  'settings.kind.question': '提问',
+  'settings.dismiss.label': '自动关闭',
+  'settings.dismiss.3000': '3 秒',
+  'settings.dismiss.6000': '6 秒',
+  'settings.dismiss.10000': '10 秒',
+  'settings.dismiss.30000': '30 秒',
+  'settings.dismiss.0': '永不',
+  'config.section.kinds': '提醒内容',
+  'config.section.popup': '轻弹窗',
+  'config.section.permission': '系统通知权限',
+  'config.section.status': '运行状态',
+  'config.intro': '提醒都从当前页面发出：窗口不在前台时是系统通知，窗口在前台时是这里的轻弹窗。',
+  'config.saveNote': '开关保存在浏览器本地，重装插件不会丢失。',
+  'config.dismiss.note': '鼠标停在上面时不会消失；选「永不」时，每条要自己点 ✕ 或按 Esc 关掉。',
+  'config.testHint': '这里的按钮直接走系统通知通道，用来验证系统通知本身是否可用（窗口在前台也照发）。',
+  'config.testAny': '测试提醒',
+  'config.testSystem': '测试系统通知',
+  'config.diag.window': '窗口状态',
+  'config.diag.watch': '会话监听',
+  'config.diag.inFront': '在前台（会走轻弹窗）',
+  'config.diag.away': '不在前台（会走系统通知）',
+  'config.diag.last': '最近一次投递',
+  'config.diag.none': '还没有投递过',
+  'config.diag.systemShown': '系统通知（系统已确认弹出）',
+  'config.diag.systemUnconfirmed': '系统通知（系统没有回报，回到窗口时补发轻弹窗）',
+  'config.diag.systemFailed': '系统通知没弹出来，回到窗口时补发轻弹窗',
+  'config.diag.replayDelivery': '应用内轻弹窗（回到窗口时补发）',
+  'config.diag.popup': '应用内轻弹窗',
+  'config.diag.refused': '系统通知被拒绝，改用了轻弹窗',
+  'config.diag.replay': '待补发提醒',
+  'config.diag.replayValue': '{count} 条',
+  'config.diag.replayNone': '没有',
+}
@@ -0,0 +1,25 @@
+/**
+ * Build entry of the browser half: the one file the bundle registers with.
+ *
+ * `scripts/build-client.mjs` wraps the built body of this module in the
+ * registration this package is served through:
+ *
+ * ```js
+ * window.__ModuleLoader__.load({
+ *   id: '@dsh-plugin/session-notify',
+ *   factory(require) {
+ *     // …the whole bundle body, so `require('react')` runs at materialization…
+ *     return module.exports
+ *   },
+ * })
+ * ```
+ *
+ * The client module system resolves `require` against its own module table —
+ * platform seeds such as `react`, and other plugins' rows — and never against
+ * relative files, which is why this package's source is bundled into a single
+ * self-contained `client.js` instead of being served module by module.
+ *
+ * @module @dsh-plugin/session-notify/client
+ */
+
+export { inject, apply } from './plugin.js'
@@ -0,0 +1,105 @@
+/**
+ * Every browser and platform fact this plugin reads, in one seam.
+ *
+ * Nothing here owns state or decides anything: the window's visibility, the
+ * notification permission, the notification icon, and the one platform hint the
+ * settings copy uses. Each read is contained, because a page a plugin does not
+ * control may hide any of them — and because a contained read is what lets the
+ * delivery path keep going when the answer is unreadable.
+ *
+ * @module @dsh-plugin/session-notify/client/platform
+ */
+
+/**
+ * The window's Notification constructor, or undefined when this environment has
+ * none (a plain Node test, or a browser without the API).
+ * @returns the constructor, or undefined.
+ */
+export function notificationApi() {
+  const Ctor = globalThis.Notification
+  return typeof Ctor === 'function' ? Ctor : undefined
+}
+
+/** Permission lookup that never throws in a browser without the API. */
+export function notificationPermission() {
+  const Ctor = notificationApi()
+  if (Ctor === undefined) return 'unsupported'
+  const permission = Ctor.permission
+  if (permission === 'granted' || permission === 'denied' || permission === 'default') return permission
+  return 'default'
+}
+
+/**
+ * Whether the Harness window is somewhere the user cannot see the app.
+ *
+ * Two independent browser facts are consulted, and ANY of them counts as "not
+ * in the foreground": the page's visibility and the document's focus. They are
+ * read at delivery time rather than remembered from an event, because a missed
+ * blur in the desktop shell made this plugin believe the window was in front
+ * and swallow the alert.
+ * @returns whether the alert must go to the system notification channel.
+ */
+export function windowIsAway() {
+  try {
+    if (document.visibilityState === 'hidden') return true
+  } catch {
+    /* an unreadable visibility state leaves the focus fact */
+  }
+  try {
+    if (typeof document.hasFocus === 'function') return !document.hasFocus()
+  } catch {
+    /* an unreadable focus state leaves the default below */
+  }
+  return false
+}
+
+/** Read the window's live focus state rather than a cached value. */
+export function currentFocus() {
+  return !windowIsAway()
+}
+
+/** Focus the window without letting a refusal stop the navigation. */
+export function focusWindow() {
+  try {
+    globalThis.focus?.()
+  } catch {
+    /* focus is best effort on every platform */
+  }
+}
+
+/**
+ * The system-notification icon, built once when this bundle materializes: this
+ * deployment's own static URL when the page serves this package's assets, else
+ * the SVG inline. Icons are cosmetic on every platform, so each step is
+ * contained — and materialization happens on first import, not when the bundle
+ * script runs, so a page that never activates the plugin never gets here.
+ * @type {string | undefined} an icon URL, or undefined when neither form works.
+ */
+export const systemIcon = (() => {
+  try {
+    const url = new URL('./icon.svg', document.baseURI).href
+    if (url !== '') return url
+  } catch {
+    /* fall through to the inline form */
+  }
+  try {
+    const svg = '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16"><path d="M8 2.35C5.7 2.35 3.83 4.22 3.83 6.52V9.02L3.06 11.1C2.99 11.29 3.13 11.48 3.33 11.48H12.67C12.87 11.48 13.01 11.29 12.94 11.1L12.17 9.02V6.52C12.17 4.22 10.3 2.35 8 2.35Z" fill="none" stroke="%23247bbf" stroke-width="1.2"/><path d="M6.3 12.75C6.52 13.66 7.2 14.28 8 14.28C8.8 14.28 9.48 13.66 9.7 12.75" fill="none" stroke="%23247bbf" stroke-width="1.2" stroke-linecap="round"/></svg>'
+    return `data:image/svg+xml,${svg}`
+  } catch {
+    return undefined
+  }
+})()
+
+/** One best-effort platform hint, used for settings help text only. */
+export function platformKey() {
+  try {
+    const agent = navigator.userAgentData
+    const platform = String((agent?.platform ?? navigator.platform) || navigator.userAgent || '')
+    if (/win/i.test(platform)) return 'win'
+    if (/mac|iphone|ipad/i.test(platform)) return 'mac'
+    if (/linux|x11/i.test(platform)) return 'linux'
+  } catch {
+    /* an unreadable navigator keeps the neutral hint */
+  }
+  return 'plain'
+}
@@ -0,0 +1,218 @@
+/**
+ * Client half of the session-notify bundle: the composition root.
+ *
+ * One job: tell the user when a conversation needs attention. Three triggers —
+ * a conversation that stopped running, a pending tool approval, and a pending
+ * question or plan review — are derived from the client's own session state, and
+ * each one is delivered exactly once, through exactly one channel:
+ *
+ * - the Harness window not in the foreground → a system notification, raised
+ *   through the page's Web `Notification` constructor. That is the only
+ *   system-notification channel a plugin can reach: `@deepseek-ai/dsh-desktop-host`
+ *   runs the Host half in a plain Node process rather than in Electron's main
+ *   process, so the Host side has no `Notification` to call. The same Web API
+ *   backs Windows, macOS, and Linux inside the Desktop shell, so delivery has no
+ *   platform branch at all — only the settings row's *help text* names the
+ *   platform's own notification settings.
+ * - the window in the foreground, and the finished conversation not the one on
+ *   screen → a light in-app popup, because a desktop notification while you are
+ *   looking at the app is noise.
+ *
+ * This module owns no behavior of its own: it creates the plugin's own store and
+ * the shared state every part reads, assembles the modules under `core/`, and
+ * registers the three slot entries. The rules live with the code that applies
+ * them — `core/observe.js` decides when an alert is owed, `core/delivery.js`
+ * picks its channel, `core/replay.js` and `core/system-channel.js` carry it.
+ *
+ * State comes exclusively from the slot props' standard selector hooks
+ * (`useSessions`, `useSessionStatus`) — the documented way for a plugin to read
+ * session data. Nothing here polls, folds session events, or reaches into
+ * another plugin.
+ *
+ * @module @dsh-plugin/session-notify/client/plugin
+ */
+
+import { NS, PACKAGE_NAME } from './constants.js'
+import { createTranslator, registerDictionaries } from './i18n/index.js'
+import { focusWindow, notificationPermission, platformKey, windowIsAway } from './platform.js'
+import { report, text } from './core/log.js'
+import { createStore } from './core/store.js'
+import { readStoredDismissMs, readStoredKinds } from './core/storage.js'
+import { createCopy } from './core/copy.js'
+import { createToastStack } from './core/toasts.js'
+import { createReplay } from './core/replay.js'
+import { createSystemChannel } from './core/system-channel.js'
+import { createDelivery } from './core/delivery.js'
+import { createObservation } from './core/observe.js'
+import { createActions } from './core/actions.js'
+import { ToastLayer } from './ui/ToastLayer.js'
+import { ConfigSection } from './ui/ConfigSection.js'
+import { NotifyObserver } from './ui/NotifyObserver.js'
+
+/** The services this plugin needs; without them Cordis defers activation. */
+export const inject = ['slots', 'locale']
+
+/**
+ * Install the plugin.
+ * @param ctx - Client root context providing `slots` and `locale`.
+ */
+export function apply(ctx) {
+  const locale = ctx.get('locale')
+  const t = createTranslator(locale)
+
+  const store = createStore({
+    permission: notificationPermission(),
+    kinds: readStoredKinds(),
+    dismissAfterMs: readStoredDismissMs(),
+    toasts: [],
+    promptError: '',
+    health: { state: 'starting', message: '' },
+    lastDelivery: null,
+  })
+
+  /** Freshest session state the observer has seen; the delivery path reads it at delivery time. */
+  const live = { list: undefined, status: undefined }
+  /**
+   * Late-bound seams. Two module pairs genuinely call back into each other — the
+   * replay queue records its own delivery through the delivery path, which is
+   * built afterwards — so those edges are resolved here instead of by importing
+   * one module from the other, which would make the import graph cyclic.
+   */
+  const runtime = {}
+  let disposed = false
+
+  /** Republish the store, so the settings page follows replay and delivery book changes. */
+  const publish = () => {
+    if (!disposed) store.set({ ...store.getSnapshot() })
+  }
+
+  /** Bring one conversation to the front, when the client exposes that operation. */
+  const openSession = (sessionId) => {
+    try {
+      ctx.get('uiWorkspace')?.openSession?.(sessionId)
+    } catch (error) {
+      report(`could not open "${sessionId}": ${text(error)}`)
+    }
+  }
+
+  const copy = createCopy(t)
+  const toasts = createToastStack({ store, copy })
+  const replay = createReplay({
+    store,
+    publish,
+    showToast: toasts.showToast,
+    recordDelivery: (outcome, candidate, monitor) => runtime.delivery?.recordDelivery(outcome, candidate, monitor),
+  })
+  const system = createSystemChannel({
+    store,
+    copy,
+    notify: report,
+    openSession,
+    dropReplay: replay.dropReplay,
+  })
+  const delivery = createDelivery({ store, copy, live, toasts, system, replay })
+  runtime.delivery = delivery
+  const observation = createObservation({ store, live, queue: delivery.queue })
+  const actions = createActions({ store, t, delivery, system, toasts, publish })
+
+  /** Keep the page's own focus events owned by this plugin's effect. */
+  const installBridges = () => {
+    const onBlur = () => {
+      delivery.resetThrottle()
+    }
+    // Coming back is the moment the user can finally be told about whatever the
+    // system channel carried while the window was away, and it also clears the
+    // throttle so the first alert after returning is never swallowed.
+    const onReturn = () => {
+      delivery.resetThrottle()
+      replay.flushReplay()
+    }
+    const onVisibilityChange = () => {
+      if (!windowIsAway()) onReturn()
+    }
+    try {
+      window.addEventListener('focus', onReturn)
+      window.addEventListener('blur', onBlur)
+      document.addEventListener('visibilitychange', onVisibilityChange)
+    } catch {
+      /* an unreadable window still delivers through live focus reads */
+    }
+    return () => {
+      try {
+        window.removeEventListener('focus', onReturn)
+        window.removeEventListener('blur', onBlur)
+        document.removeEventListener('visibilitychange', onVisibilityChange)
+      } catch {
+        /* nothing to detach */
+      }
+      delivery.dispose()
+      toasts.dispose()
+      system.dispose()
+      replay.dispose()
+    }
+  }
+
+  ctx.effect(() => registerDictionaries(locale), 'session-notify: dictionaries')
+  ctx.effect(() => installBridges(), 'session-notify: window focus')
+  ctx.effect(() => () => {
+    disposed = true
+  }, 'session-notify: disposal')
+
+  ctx.slots.inject('shell.overlay', () => ctx.slots.register({
+    name: 'shell.overlay',
+    id: `${NS}-toasts`,
+    order: 100,
+    locale: NS,
+    inject: () => ({
+      store,
+      fallbackT: t,
+      dismiss: toasts.closeToast,
+      arm: toasts.armToast,
+      hold: toasts.holdToast,
+      open: (sessionId) => {
+        focusWindow()
+        openSession(sessionId)
+      },
+    }),
+  }, ToastLayer))
+
+  // This plugin's configuration lives on its own page in the plugin manager,
+  // keyed by this package's name — the seat the shipped experimental bundle
+  // uses for its own settings, and the one the plugin page renders between the
+  // bundle's description and its rows. It is deliberately NOT a General
+  // settings row: a plugin's options belong to the plugin.
+  ctx.slots.inject('plugins.bundle.config', () => ctx.slots.register({
+    name: 'plugins.bundle.config',
+    key: PACKAGE_NAME,
+    locale: NS,
+    inject: () => ({
+      store,
+      fallbackT: t,
+      copy,
+      platform: platformKey(),
+      replayCount: replay.size,
+      ask: actions.requestPermission,
+      testAny: actions.sendTest,
+      testSystem: actions.sendTestSystem,
+      setKind: actions.setKindEnabled,
+      setDismiss: actions.setDismissAfter,
+    }),
+  }, ConfigSection))
+
+  // The observer lives in the frame-wide overlay, NOT in `sidebar.panellist`.
+  //
+  // That owner does not merely render its entries: it also reads WHICH entries
+  // exist and turns each one into a sidebar panel button (id → panel id, label
+  // → button text, the entry itself → the glyph). A renderless entry there is
+  // therefore an extra, empty panel row in the left column — which is exactly
+  // how this plugin broke the sidebar once. The overlay is the non-generic
+  // seat: it is a floating layer whose entries routinely render nothing, so a
+  // `null`-rendering observer is an ordinary occupant, and it carries the same
+  // root-scope standard props (`useSessions`, `useSessionStatus`).
+  ctx.slots.inject('shell.overlay', () => ctx.slots.register({
+    name: 'shell.overlay',
+    id: `${NS}-watch`,
+    order: 101,
+    inject: () => ({ observation }),
+  }, NotifyObserver))
+}
@@ -0,0 +1,152 @@
+/**
+ * This plugin's configuration, rendered on its own page in the plugin
+ * manager (`plugins.bundle.config`, keyed by this package's name).
+ *
+ * The owner asks for two views: `summary` (a one-liner that stands in for the
+ * row's description) and `page` (the whole form). Everything visible here
+ * belongs to this package, including the platform-specific permission hint.
+ *
+ * The page is laid out as three groups — what to notify about, the system
+ * channel's own state, and what the plugin is doing right now. Each group keeps
+ * its controls in one place: a list whose rows carry the subject on the left and
+ * the control on the right, and a fact list for the readings, so the status
+ * block is scannable instead of being four sentences in one cell.
+ *
+ * @module @dsh-plugin/session-notify/client/ui/ConfigSection
+ */
+
+import * as React from 'react'
+import { DISMISS_CHOICES, KINDS } from '../constants.js'
+import { windowIsAway } from '../platform.js'
+import { DismissRow } from './DismissRow.js'
+import { KindRow } from './KindRow.js'
+import { seatTranslator, useOwnStore } from './hooks.js'
+import { CSS } from './styles.js'
+
+const h = React.createElement
+
+export function ConfigSection(props) {
+  const snapshot = useOwnStore(props.store)
+  const tr = seatTranslator(props, props.fallbackT)
+  if (props.view === 'summary') return h(React.Fragment, null, tr('settings.description'))
+
+  const permission = snapshot.permission
+  const supported = permission !== 'unsupported'
+  const failed = permission === 'denied' || snapshot.promptError !== ''
+  const statusKey = permission === 'granted'
+    ? 'settings.permission.granted'
+    : permission === 'denied'
+      ? 'settings.permission.denied'
+      : supported
+        ? 'settings.permission.default'
+        : 'settings.permission.unsupported'
+  const promptFailed = snapshot.promptError !== ''
+  const permissionText = promptFailed ? snapshot.promptError : tr(statusKey)
+  const dotClass = permission === 'granted'
+    ? ''
+    : failed ? ' is-error' : supported ? ' is-warn' : ' is-muted'
+  const permissionNote = promptFailed
+    ? ''
+    : permission === 'denied' || !supported
+      ? tr(`settings.permission.hint.${props.platform}`)
+      : permission === 'granted'
+        ? tr('config.testHint')
+        : tr('settings.permission.hint.plain')
+
+  const health = snapshot.health
+  const healthText = health.state === 'watching'
+    ? tr('settings.health.watching')
+    : health.state === 'noHooks'
+      ? tr('settings.health.noHooks')
+      : health.state === 'error'
+        ? tr('settings.health.error', { message: health.message })
+        : tr('settings.health.starting')
+  const healthFailed = health.state !== 'watching' && health.state !== 'starting'
+
+  const delivery = props.copy.deliveryFacts(snapshot.lastDelivery, tr)
+
+  return h(React.Fragment, null,
+    h('style', null, CSS),
+    h('div', { className: 'dsn-page' },
+      // The page header already shows this bundle's title and description, so this
+      // lede says what the header cannot: how an alert travels, and that the
+      // channel is chosen at delivery time.
+      h('p', { className: 'dsn-lede' }, tr('config.intro')),
+
+      h('section', { className: 'dsn-group' },
+        h('h3', { className: 'dsn-group-title' }, tr('config.section.kinds')),
+        h('div', { className: 'dsn-list' },
+          KINDS.map((kind) => h(KindRow, {
+            key: kind,
+            label: tr(`settings.kind.${kind}`),
+            checked: snapshot.kinds[kind] === true,
+            disabled: false,
+            onToggle: () => props.setKind(kind, snapshot.kinds[kind] !== true),
+          }))),
+        h('p', { className: 'dsn-group-note' }, tr('config.saveNote'))),
+
+      h('section', { className: 'dsn-group' },
+        h('h3', { className: 'dsn-group-title' }, tr('config.section.popup')),
+        h('div', { className: 'dsn-list' },
+          h(DismissRow, {
+            label: tr('settings.dismiss.label'),
+            options: DISMISS_CHOICES.map((value) => ({ value, label: tr(`settings.dismiss.${value}`) })),
+            value: snapshot.dismissAfterMs,
+            onChange: props.setDismiss,
+          })),
+        h('p', { className: 'dsn-group-note' }, tr('config.dismiss.note'))),
+
+      h('section', { className: 'dsn-group' },
+        h('h3', { className: 'dsn-group-title' }, tr('config.section.permission')),
+        h('div', { className: 'dsn-list' },
+          h('div', { className: 'dsn-row' },
+            h('div', { className: 'dsn-row-text' },
+              h('span', {
+                className: 'dsn-state',
+                role: failed ? 'alert' : 'status',
+              },
+              h('span', { className: `dsn-dot${dotClass}` }),
+              permissionText),
+              h('p', { className: 'dsn-row-sub' }, permissionNote)),
+            h('button', {
+              type: 'button',
+              className: `dsn-button${supported && permission !== 'granted' ? ' is-primary' : ''}`,
+              disabled: !supported,
+              onClick: permission === 'granted' ? props.testSystem : props.ask,
+            }, tr(!supported
+              ? 'settings.action.unsupported'
+              : permission === 'granted' ? 'settings.action.testSystem' : 'settings.action.allow'))))),
+
+      h('section', { className: 'dsn-group' },
+        h('h3', { className: 'dsn-group-title' }, tr('config.section.status')),
+        h('dl', { className: 'dsn-facts' },
+          h('dt', { className: 'dsn-fact-key' }, tr('config.diag.window')),
+          h('dd', { className: 'dsn-fact' },
+            h('p', { className: 'dsn-fact-value' }, tr(windowIsAway() ? 'config.diag.away' : 'config.diag.inFront'))),
+          h('dt', { className: 'dsn-fact-key' }, tr('config.diag.watch')),
+          h('dd', { className: 'dsn-fact' },
+            h('p', {
+              className: `dsn-fact-value${healthFailed ? ' is-error' : ''}`,
+              role: healthFailed ? 'alert' : 'status',
+            }, healthText)),
+          h('dt', { className: 'dsn-fact-key' }, tr('config.diag.last')),
+          h('dd', { className: 'dsn-fact' },
+            delivery === null
+              ? h('p', { className: 'dsn-fact-value' }, tr('config.diag.none'))
+              : [
+                h('p', { key: 'line', className: 'dsn-fact-value' }, `${delivery.at} · ${delivery.outcome}`),
+                delivery.title === ''
+                  ? null
+                  : h('p', { key: 'title', className: 'dsn-fact-title' }, delivery.title),
+              ]),
+          h('dt', { className: 'dsn-fact-key' }, tr('config.diag.replay')),
+          h('dd', { className: 'dsn-fact' },
+            h('p', { className: 'dsn-fact-value' }, props.copy.replayValue(props.replayCount(), tr)))),
+        h('div', { className: 'dsn-list' },
+          h('div', { className: 'dsn-row is-action' },
+            h('button', {
+              type: 'button',
+              className: 'dsn-button',
+              onClick: props.testAny,
+            }, tr('settings.action.testAny')))))))
+}
@@ -0,0 +1,30 @@
+/**
+ * One popup-lifetime row: the choices are the values they set, so the row needs
+ * no second control and no free-form input.
+ *
+ * @module @dsh-plugin/session-notify/client/ui/DismissRow
+ */
+
+import * as React from 'react'
+
+const h = React.createElement
+
+/**
+ * @param props - `label` (the row's own label and the group's accessible name),
+ *   `options` (`{ value, label }[]`, in display order), `value` (the chosen one),
+ *   and `onChange(value)`.
+ */
+export function DismissRow(props) {
+  return h('div', { className: 'dsn-row' },
+    h('div', { className: 'dsn-row-text' },
+      h('div', { className: 'dsn-row-title' }, props.label)),
+    h('div', { className: 'dsn-chips', role: 'radiogroup', 'aria-label': props.label },
+      props.options.map((option) => h('button', {
+        key: String(option.value),
+        type: 'button',
+        role: 'radio',
+        className: 'dsn-chip',
+        'aria-checked': option.value === props.value,
+        onClick: () => props.onChange(option.value),
+      }, option.label))))
+}
@@ -0,0 +1,25 @@
+/**
+ * One trigger switch row: the label says which notification it governs and
+ * the switch is the control, so the row never needs a second description.
+ *
+ * @module @dsh-plugin/session-notify/client/ui/KindRow
+ */
+
+import * as React from 'react'
+
+const h = React.createElement
+
+export function KindRow(props) {
+  return h('div', { className: 'dsn-row' },
+    h('div', { className: 'dsn-row-text' },
+      h('div', { className: 'dsn-row-title' }, props.label)),
+    h('button', {
+      type: 'button',
+      role: 'switch',
+      className: 'dsn-switch',
+      'aria-checked': props.checked,
+      'aria-label': props.label,
+      disabled: props.disabled,
+      onClick: props.onToggle,
+    }, h('span', { className: 'dsn-thumb' })))
+}
@@ -0,0 +1,42 @@
+/**
+ * The resident observer: one invisible entry in a root-scope slot, which is
+ * how a plugin reaches the session hooks without occupying visible UI. It
+ * renders `null`, and any failure in its own derivation is contained here so
+ * a slot entry can never crash.
+ *
+ * It subscribes to the window state only so a foreground/background change
+ * re-derives promptly; the delivery itself re-reads that state, so a missed
+ * event can no longer pick the wrong channel.
+ *
+ * @module @dsh-plugin/session-notify/client/ui/NotifyObserver
+ */
+
+import * as React from 'react'
+import { text } from '../core/log.js'
+import { useWindowState } from './hooks.js'
+
+export function NotifyObserver(props) {
+  useWindowState()
+  const useSessions = props.useSessions
+  const useSessionStatus = props.useSessionStatus
+  const select = React.useCallback((snapshot) => snapshot, [])
+  const list = typeof useSessions === 'function' ? useSessions(select) : undefined
+  const status = typeof useSessionStatus === 'function' ? useSessionStatus(select) : undefined
+  React.useEffect(() => {
+    try {
+      if (typeof props.useSessions !== 'function' || typeof props.useSessionStatus !== 'function') {
+        props.observation.reportHealth({ state: 'noHooks', message: '' })
+        return
+      }
+      if (list === undefined || status === undefined) {
+        props.observation.reportHealth({ state: 'starting', message: '' })
+        return
+      }
+      props.observation.observe(list, status)
+      props.observation.reportHealth({ state: 'watching', message: '' })
+    } catch (error) {
+      props.observation.reportHealth({ state: 'error', message: text(error) })
+    }
+  })
+  return null
+}
@@ -0,0 +1,62 @@
+/**
+ * The light popup stack: the frame-wide overlay entry this package owns.
+ *
+ * @module @dsh-plugin/session-notify/client/ui/ToastLayer
+ */
+
+import * as React from 'react'
+import { KindIcon, CloseIcon } from './icons.js'
+import { seatTranslator, useOwnStore } from './hooks.js'
+import { CSS } from './styles.js'
+
+const h = React.createElement
+
+export function ToastLayer(props) {
+  const snapshot = useOwnStore(props.store)
+  const toasts = snapshot.toasts
+  const tr = seatTranslator(props, props.fallbackT)
+  React.useEffect(() => {
+    if (toasts.length === 0) return undefined
+    const onKeyDown = (event) => {
+      if (event.key !== 'Escape' || event.defaultPrevented) return
+      const top = toasts[0]
+      if (top === undefined) return
+      event.preventDefault()
+      props.dismiss(top.id)
+    }
+    document.addEventListener('keydown', onKeyDown)
+    return () => {
+      document.removeEventListener('keydown', onKeyDown)
+    }
+  }, [toasts, props])
+  if (toasts.length === 0) return null
+  return h(React.Fragment, null,
+    h('style', null, CSS),
+    h('div', { className: 'dsn-stack', role: 'region', 'aria-live': 'polite' },
+      toasts.map((toast) => h('div', {
+        key: toast.id,
+        className: 'dsn-toast',
+        role: toast.kind === 'completion' ? 'status' : 'alert',
+        onMouseEnter: () => props.hold(toast.id),
+        onMouseLeave: () => props.arm(toast.id),
+      },
+      h('span', { className: `dsn-toast-icon is-${toast.kind}` }, h(KindIcon, { kind: toast.kind, size: 16 })),
+      h('div', { className: 'dsn-toast-text' },
+        h('div', { className: 'dsn-toast-title' }, toast.title),
+        h('div', { className: 'dsn-toast-desc' }, toast.body)),
+      h('div', { className: 'dsn-toast-actions' },
+        h('button', {
+          type: 'button',
+          className: 'dsn-toast-action',
+          onClick: () => {
+            props.dismiss(toast.id)
+            props.open(toast.sessionId)
+          },
+        }, tr('toast.view')),
+        h('button', {
+          type: 'button',
+          className: 'dsn-toast-close',
+          'aria-label': tr('toast.dismiss'),
+          onClick: () => props.dismiss(toast.id),
+        }, h(CloseIcon, { size: 14 })))))))
+}
@@ -0,0 +1,49 @@
+/**
+ * The React seams the components share: two subscriptions this plugin needs
+ * beyond the ones the slot owner already provides, plus the seat rule for
+ * translation.
+ *
+ * @module @dsh-plugin/session-notify/client/ui/hooks
+ */
+
+import * as React from 'react'
+import { windowIsAway } from '../platform.js'
+
+/** Subscribe to this plugin's own store from inside a component. */
+export function useOwnStore(source) {
+  return React.useSyncExternalStore(source.subscribe, source.getSnapshot, source.getSnapshot)
+}
+
+/**
+ * Subscribe to every browser signal that says whether the app is visible:
+ * the window's focus events and the document's visibility change. The value
+ * itself is a boolean, so the observer re-renders once per transition.
+ */
+export function useWindowState() {
+  const subscribe = React.useCallback((listener) => {
+    try {
+      window.addEventListener('focus', listener)
+      window.addEventListener('blur', listener)
+      document.addEventListener('visibilitychange', listener)
+    } catch {
+      return () => {}
+    }
+    return () => {
+      window.removeEventListener('focus', listener)
+      window.removeEventListener('blur', listener)
+      document.removeEventListener('visibilitychange', listener)
+    }
+  }, [])
+  return React.useSyncExternalStore(subscribe, () => !windowIsAway(), () => true)
+}
+
+/**
+ * Every component translates through this: the slot's own seat when the owner
+ * supplies one, else this package's own translator.
+ * @param props - the slot entry's props, which carry the owner's `t` when it has one.
+ * @param fallback - the plugin's own translator, used when the seat has none.
+ * @returns the translate function this render should use.
+ */
+export function seatTranslator(props, fallback) {
+  return typeof props.t === 'function' ? props.t : fallback
+}
@@ -0,0 +1,72 @@
+/**
+ * This bundle's own artwork, drawn like the shipped outline set.
+ *
+ * @module @dsh-plugin/session-notify/client/ui/icons
+ */
+
+import * as React from 'react'
+
+const h = React.createElement
+
+/** Bell glyph: used for a finished conversation. */
+export function BellIcon({ size = 16 }) {
+  return h('svg', {
+    width: size, height: size, viewBox: '0 0 16 16', fill: 'none',
+    xmlns: 'http://www.w3.org/2000/svg', 'aria-hidden': true,
+  },
+  h('path', {
+    d: 'M8 2.35C5.7 2.35 3.83 4.22 3.83 6.52V9.02L3.06 11.1C2.99 11.29 3.13 11.48 3.33 11.48H12.67C12.87 11.48 13.01 11.29 12.94 11.1L12.17 9.02V6.52C12.17 4.22 10.3 2.35 8 2.35Z',
+    stroke: 'currentColor', strokeWidth: 1.2, strokeLinejoin: 'round',
+  }),
+  h('path', {
+    d: 'M6.3 12.75C6.52 13.66 7.2 14.28 8 14.28C8.8 14.28 9.48 13.66 9.7 12.75',
+    stroke: 'currentColor', strokeWidth: 1.2, strokeLinecap: 'round',
+  }))
+}
+
+/** Shield glyph for an approval request. */
+export function ShieldIcon({ size = 16 }) {
+  return h('svg', {
+    width: size, height: size, viewBox: '0 0 16 16', fill: 'none',
+    xmlns: 'http://www.w3.org/2000/svg', 'aria-hidden': true,
+  },
+  h('path', {
+    d: 'M8 1.9 13.1 3.7V7.9C13.1 11 11 13.3 8 14.2C5 13.3 2.9 11 2.9 7.9V3.7L8 1.9Z',
+    stroke: 'currentColor', strokeWidth: 1.2, strokeLinejoin: 'round',
+  }),
+  h('path', {
+    d: 'M5.9 8.05L7.35 9.5L10.15 6.6',
+    stroke: 'currentColor', strokeWidth: 1.2, strokeLinecap: 'round', strokeLinejoin: 'round',
+  }))
+}
+
+/** Question glyph for a pending question or plan review. */
+export function QuestionIcon({ size = 16 }) {
+  return h('svg', {
+    width: size, height: size, viewBox: '0 0 16 16', fill: 'none',
+    xmlns: 'http://www.w3.org/2000/svg', 'aria-hidden': true,
+  },
+  h('circle', { cx: 8, cy: 8, r: 6.15, stroke: 'currentColor', strokeWidth: 1.2 }),
+  h('path', {
+    d: 'M6.35 6.35C6.35 5.44 7.09 4.7 8 4.7C8.91 4.7 9.65 5.44 9.65 6.35C9.65 7.75 8 7.7 8 9.15',
+    stroke: 'currentColor', strokeWidth: 1.2, strokeLinecap: 'round',
+  }),
+  h('circle', { cx: 8, cy: 11.3, r: 0.85, fill: 'currentColor' }))
+}
+
+/** Close glyph, matching the primitives' own stroke weight and geometry. */
+export function CloseIcon({ size = 12 }) {
+  return h('svg', {
+    width: size, height: size, viewBox: '0 0 16 16', fill: 'none',
+    xmlns: 'http://www.w3.org/2000/svg', 'aria-hidden': true,
+  },
+  h('path', { d: 'M2.5 2.5L13.5 13.5', stroke: 'currentColor', strokeWidth: 1.4 }),
+  h('path', { d: 'M13.5 2.5L2.5 13.5', stroke: 'currentColor', strokeWidth: 1.4 }))
+}
+
+/** Select the per-trigger glyph. */
+export function KindIcon({ kind, size }) {
+  if (kind === 'approval') return h(ShieldIcon, { size })
+  if (kind === 'question') return h(QuestionIcon, { size })
+  return h(BellIcon, { size })
+}
@@ -0,0 +1,91 @@
+/**
+ * Every style declaration this package owns.
+ *
+ * Both surfaces are built out of the theme's own vocabulary and nothing else, so
+ * they follow the shell's light and dark modes without a branch of their own (the
+ * theme swaps every `--dsw-alias-*` under `body[data-ds-dark-theme]`):
+ *
+ * - The popup is a floating card, using the same recipe the shipped menus and
+ *   modals use — `--dsw-alias-bg-layer-2` as the surface, the
+ *   `--dsw-elevation-stroke-color` / `--dsw-elevation-prominent` pair for its
+ *   hairline and shadow, `--dsw-alias-label-*` for text, and the shell's motion
+ *   tokens. It deliberately does NOT use `--dsw-alias-toast-bg`, which is a fixed
+ *   dark slate (#353638 in light mode) and would read as a black slab on a light
+ *   page.
+ * - The settings page is a reading order, not a form dump: a lede that says how
+ *   alerts travel, then one group per concern. Inside a group a title introduces
+ *   a list whose rows put the subject on the left and the single control on the
+ *   right, with hairlines only between rows; the status group is a two-column
+ *   fact list, because four sentences stacked in one cell are not scannable.
+ *
+ * Class names are renamed under `dsn-`; only the popup glyphs carry their own
+ * artwork colors — and those are theme-aware state tokens too.
+ *
+ * A plugin must not import a Harness Client package, so the declarations are
+ * this package's own text. `tests/unit/styles.test.js` holds both invariants:
+ * tokens only, and no theme-fixed color.
+ *
+ * @module @dsh-plugin/session-notify/client/ui/styles
+ */
+
+export const CSS = `
+.dsn-stack{position:fixed;top:40px;right:24px;z-index:1100;display:flex;flex-direction:column;align-items:flex-end;gap:8px;pointer-events:none}
+@media (max-width:520px){.dsn-stack{right:12px}}
+.dsn-toast{box-sizing:border-box;pointer-events:auto;display:flex;align-items:flex-start;gap:10px;width:max-content;max-width:min(420px,calc(100vw - 48px));padding:12px 12px 12px 16px;border-radius:var(--dsw-radius-lg);background:var(--dsw-alias-bg-layer-2);--dsw-elevation-stroke-color:var(--dsw-alias-border-l1);box-shadow:var(--dsw-elevation-prominent);color:var(--dsw-alias-label-primary);font-size:14px;line-height:22px;animation:dsn-toast-in var(--ds-transition-duration,.2s) var(--ds-ease-in-out,ease-out)}
+@keyframes dsn-toast-in{from{opacity:0;transform:translateX(8px)}to{opacity:1;transform:translateX(0)}}
+@media (prefers-reduced-motion: reduce){.dsn-toast{animation:none}}
+.dsn-toast-icon{display:grid;place-items:center;flex:none;height:22px;color:var(--dsw-alias-state-warn-label)}
+.dsn-toast-icon.is-completion{color:var(--dsw-alias-state-success-primary)}
+.dsn-toast-icon.is-question{color:var(--dsw-alias-state-business-primary)}
+.dsn-toast-text{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}
+.dsn-toast-title{color:var(--dsw-alias-label-primary);font-weight:500;font-size:14px;line-height:22px}
+.dsn-toast-desc{color:var(--dsw-alias-label-secondary);font-size:13px;line-height:20px;overflow-wrap:break-word}
+.dsn-toast-actions{display:flex;align-items:center;gap:2px;flex:none}
+.dsn-toast-action{display:inline-flex;align-items:center;height:28px;padding:0 8px;border:0;border-radius:var(--dsw-radius-sm);background:none;color:var(--dsw-alias-state-business-primary);font:inherit;font-size:13px;line-height:20px;cursor:pointer}
+.dsn-toast-action:hover{background:var(--dsw-alias-interactive-bg-hover)}
+.dsn-toast-action:focus-visible{outline:var(--dsw-focus-ring-width) solid var(--dsw-focus-ring-color,var(--dsw-alias-state-business-primary));outline-offset:2px}
+.dsn-toast-close{flex:none;display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border:0;border-radius:var(--dsw-radius-sm);background:transparent;color:var(--dsw-alias-label-tertiary);cursor:pointer}
+.dsn-toast-close:hover{background:var(--dsw-alias-interactive-bg-hover);color:var(--dsw-alias-label-primary)}
+.dsn-toast-close:focus-visible{outline:var(--dsw-focus-ring-width) solid var(--dsw-focus-ring-color,var(--dsw-alias-state-business-primary));outline-offset:2px}
+.dsn-page{display:flex;flex-direction:column;gap:28px;max-width:560px}
+.dsn-lede{margin:0;color:var(--dsw-alias-label-secondary);font-size:13px;line-height:20px}
+.dsn-group{display:flex;flex-direction:column;gap:2px}
+.dsn-group-title{margin:0 0 8px;color:var(--dsw-alias-label-primary);font-size:13px;font-weight:600;line-height:20px}
+.dsn-group-note{margin:8px 0 0;color:var(--dsw-alias-label-tertiary);font-size:12px;line-height:18px}
+.dsn-list{display:flex;flex-direction:column}
+.dsn-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 0}
+.dsn-row+.dsn-row{border-top:.5px solid var(--dsw-alias-border-l2)}
+.dsn-row.is-action{justify-content:flex-end;padding:12px 0 0}
+.dsn-row-text{display:flex;flex-direction:column;gap:2px;min-width:0}
+.dsn-row-title{color:var(--dsw-alias-label-primary);font-size:14px;line-height:22px}
+.dsn-chips{display:flex;align-items:center;gap:6px;flex:none}
+.dsn-chip{box-sizing:border-box;display:inline-flex;align-items:center;justify-content:center;height:28px;min-width:46px;padding:0 10px;border:.5px solid var(--dsw-alias-border-l4);border-radius:var(--dsw-radius-sm);background:transparent;color:var(--dsw-alias-label-secondary);font:inherit;font-size:12.5px;line-height:18px;cursor:pointer}
+.dsn-chip:hover:not([aria-checked='true']){background:var(--dsw-alias-interactive-bg-hover);color:var(--dsw-alias-label-primary)}
+.dsn-chip[aria-checked='true']{border-color:transparent;background:var(--dsw-alias-brand-primary);color:var(--dsw-alias-label-primary-foreground);cursor:default}
+.dsn-chip:focus-visible{outline:var(--dsw-focus-ring-width) solid var(--dsw-focus-ring-color,var(--dsw-alias-state-business-primary));outline-offset:2px}
+.dsn-row-sub{margin:0;color:var(--dsw-alias-label-tertiary);font-size:12px;line-height:18px}
+.dsn-state{display:inline-flex;align-items:center;gap:8px;color:var(--dsw-alias-label-primary);font-size:14px;line-height:22px}
+.dsn-dot{flex:none;width:6px;height:6px;border-radius:50%;background:var(--dsw-alias-state-success-primary)}
+.dsn-dot.is-warn{background:var(--dsw-alias-state-warn-label)}
+.dsn-dot.is-error{background:var(--dsw-alias-state-error-primary)}
+.dsn-dot.is-muted{background:var(--dsw-alias-border-l3)}
+.dsn-facts{display:grid;grid-template-columns:auto minmax(0,1fr);gap:8px 14px;margin:0;min-width:0}
+.dsn-fact-key{margin:0;color:var(--dsw-alias-label-tertiary);font-size:12px;line-height:18px;white-space:nowrap}
+.dsn-fact{display:flex;flex-direction:column;gap:2px;margin:0;min-width:0}
+.dsn-fact-value{margin:0;color:var(--dsw-alias-label-secondary);font-size:12px;line-height:18px;overflow-wrap:anywhere}
+.dsn-fact-value.is-error{color:var(--dsw-alias-state-error-primary)}
+.dsn-fact-title{margin:0;color:var(--dsw-alias-label-primary);font-size:12px;line-height:18px;overflow-wrap:anywhere}
+.dsn-switch{box-sizing:border-box;position:relative;flex:0 0 auto;width:36px;height:20px;padding:2px;border:0;border-radius:999px;background:var(--dsw-alias-border-l3);cursor:pointer}
+.dsn-switch[aria-checked='true']{background:var(--dsw-alias-brand-primary)}
+.dsn-switch:disabled{cursor:default;opacity:.5}
+.dsn-switch:focus-visible{outline:var(--dsw-focus-ring-width) solid var(--dsw-focus-ring-color,var(--dsw-alias-state-business-primary));outline-offset:2px}
+.dsn-thumb{display:block;width:16px;height:16px;border-radius:50%;background:var(--dsw-alias-label-primary-foreground);transition:transform 120ms ease}
+.dsn-switch[aria-checked='false'] .dsn-thumb{background:var(--dsw-alias-switch-thumb)}
+.dsn-switch[aria-checked='true'] .dsn-thumb{transform:translateX(16px)}
+.dsn-button{box-sizing:border-box;display:inline-flex;align-items:center;justify-content:center;gap:4px;height:32px;padding:0 12px;border:.5px solid var(--dsw-alias-border-l3);border-radius:var(--dsw-radius-md);cursor:pointer;font-size:13px;line-height:20px;color:var(--dsw-alias-label-primary);background:transparent;flex:none}
+.dsn-button:hover:not(:disabled){background:var(--dsw-alias-interactive-bg-hover)}
+.dsn-button:disabled{cursor:not-allowed;opacity:.4}
+.dsn-button:focus-visible{outline:var(--dsw-focus-ring-width) solid var(--dsw-focus-ring-color,var(--dsw-alias-state-business-primary));outline-offset:2px}
+.dsn-button.is-primary{border-color:transparent;background:var(--dsw-alias-brand-primary);color:var(--dsw-alias-label-primary-foreground)}
+.dsn-button.is-primary:hover:not(:disabled){background:var(--dsw-alias-brand-primary);opacity:.88}
+`
@@ -0,0 +1,159 @@
+// The built artifact, exercised the way the page exercises it: the module table
+// calls `window.__ModuleLoader__.load`, materializes the factory, and hands the
+// result to Cordis. This runs under Node with stubs, which is exactly the point:
+// the bundle may not need a DOM before its components render, and `require` may
+// only ever ask for modules the module table actually holds.
+//
+// The freshness case is the guard against the one real maintenance hazard of
+// this layout: editing src/client/** and committing without rebuilding.
+import { test } from 'node:test'
+import assert from 'node:assert/strict'
+import { readFile } from 'node:fs/promises'
+import { dirname, resolve } from 'node:path'
+import { fileURLToPath } from 'node:url'
+
+const repoRoot = resolve(dirname(fileURLToPath(import.meta.url)), '..')
+const artifactPath = resolve(repoRoot, 'client.js')
+const source = await readFile(artifactPath, 'utf8')
+
+/** The smallest React the bundle can be handed: property access only. */
+const reactStub = {
+  createElement: () => null,
+  Fragment: Symbol('Fragment'),
+  useCallback: (callback) => callback,
+  useEffect: () => {},
+  useSyncExternalStore: () => undefined,
+}
+
+/** Load the artifact against a stub module table and return its registration. */
+function materialize(moduleTable = { react: reactStub }) {
+  let registration
+  const previous = globalThis.window
+  globalThis.window = { __ModuleLoader__: { load: (value) => { registration = value } } }
+  try {
+    // eslint-disable-next-line no-new-func -- executing the artifact IS the test
+    new Function(source)()
+  } finally {
+    globalThis.window = previous
+  }
+  assert.ok(registration, 'the bundle never registered a factory')
+  const requested = []
+  const exports = registration.factory((specifier) => {
+    requested.push(specifier)
+    if (!Object.hasOwn(moduleTable, specifier)) {
+      throw new Error(`the bundle asked the module table for "${specifier}"`)
+    }
+    return moduleTable[specifier]
+  })
+  return { registration, exports, requested }
+}
+
+/** The smallest client root context that lets `apply` run without a page. */
+function fakeContext() {
+  const effects = []
+  const slots = []
+  const registrations = []
+  return {
+    effects,
+    slots,
+    registrations,
+    ctx: {
+      get: () => undefined,
+      effect: (callback, label) => {
+        effects.push(label)
+        return () => {}
+      },
+      slots: {
+        inject: (name, setup) => {
+          slots.push(name)
+          setup()
+        },
+        register: (definition, component) => {
+          registrations.push({ definition, component })
+          return { dispose() {} }
+        },
+      },
+    },
+  }
+}
+
+test('the artifact is a generated, self-contained script', () => {
+  assert.match(source.split('\n')[0], /^\/\/ Generated by scripts\/build-client\.mjs/)
+  assert.ok(!source.includes('\r'), 'the artifact must be LF-only (see .gitattributes)')
+  assert.ok(source.includes('window.__ModuleLoader__.load({'), 'missing the registration wrapper')
+  assert.ok(source.includes("id: '@dsh-plugin/session-notify',"), 'the registration id must be the package name')
+  assert.ok(source.trimEnd().endsWith('})'), 'the registration wrapper is not closed')
+
+  const factoryAt = source.indexOf('factory(require) {')
+  assert.ok(factoryAt > 0, 'the factory is missing')
+  const requires = [...source.matchAll(/\brequire\(\s*"([^"]+)"\s*\)/g)]
+  assert.ok(requires.length > 0, 'the bundle never requires react')
+  for (const [whole, specifier] of requires) {
+    assert.equal(specifier, 'react', 'only platform seeds may be requested synchronously')
+    assert.ok(source.indexOf(whole) > factoryAt, 'require must sit inside the factory, or it would load eagerly')
+  }
+  assert.ok(!/^\s*(?:import|export)\s/m.test(source), 'a self-contained bundle has no top-level import/export')
+})
+
+test('materializing the factory yields the plugin the module table expects', () => {
+  const { registration, exports, requested } = materialize()
+  assert.equal(registration.id, '@dsh-plugin/session-notify')
+  assert.deepEqual(exports.inject, ['slots', 'locale'])
+  assert.equal(typeof exports.apply, 'function')
+  assert.deepEqual([...new Set(requested)], ['react'])
+})
+
+test('applying the plugin registers its three seats without touching the DOM', () => {
+  const { exports } = materialize()
+  const { ctx, effects, slots, registrations } = fakeContext()
+  exports.apply(ctx)
+
+  assert.deepEqual(effects, [
+    'session-notify: dictionaries',
+    'session-notify: window focus',
+    'session-notify: disposal',
+  ])
+  assert.deepEqual(slots, ['shell.overlay', 'plugins.bundle.config', 'shell.overlay'])
+  assert.deepEqual(registrations.map(({ definition }) => definition.id ?? definition.key), [
+    'session-notify-toasts',
+    '@dsh-plugin/session-notify',
+    'session-notify-watch',
+  ])
+  assert.deepEqual(registrations.map(({ definition }) => definition.order), [100, undefined, 101])
+  for (const { component } of registrations) assert.equal(typeof component, 'function')
+
+  const [toasts, config] = registrations
+  const toastProps = toasts.definition.inject()
+  assert.deepEqual(toastProps.store.getSnapshot().kinds, { completion: true, approval: true, question: true })
+  assert.equal(toastProps.store.getSnapshot().permission, 'unsupported')
+  assert.equal(toastProps.platform, undefined)
+  for (const operation of ['dismiss', 'arm', 'hold', 'open']) {
+    assert.equal(typeof toastProps[operation], 'function', `${operation} is not a function`)
+  }
+  assert.equal(typeof toastProps.fallbackT, 'function')
+
+  const configProps = config.definition.inject()
+  assert.equal(typeof configProps.ask, 'function')
+  assert.equal(typeof configProps.testAny, 'function')
+  assert.equal(typeof configProps.testSystem, 'function')
+  assert.equal(typeof configProps.setKind, 'function')
+  assert.equal(typeof configProps.setDismiss, 'function')
+  assert.equal(configProps.store.getSnapshot().dismissAfterMs, 6000, 'a browser with no stored choice gets the shipped lifetime')
+  assert.equal(configProps.replayCount(), 0)
+  // No locale service in this fake context, so the plugin's own translator falls
+  // back to its English dictionary.
+  assert.equal(configProps.copy.deliveryFacts(null, configProps.fallbackT), null)
+  assert.equal(configProps.copy.replayValue(0, configProps.fallbackT), 'None')
+})
+
+test('the committed artifact is exactly what src/client builds', async (t) => {
+  const { buildClient } = await import('../scripts/build-client.mjs')
+  let built
+  try {
+    built = await buildClient({ write: false })
+  } catch (error) {
+    t.skip(`cannot rebuild without devDependencies: ${error.message}`)
+    return
+  }
+  assert.equal(built, source, 'client.js is stale — run `pnpm run build` and commit the result')
+})
@@ -0,0 +1,355 @@
+// The components, rendered through a tiny React double.
+//
+// Why a double instead of React: this repository ships no runtime dependency at
+// all, and the whole point of these tests is the wiring — which component reads
+// which prop through which seat. The double implements the four React entry
+// points this package uses, so a component render is exercised end to end (hooks
+// included) without a DOM or a real React.
+//
+// It runs against the BUILT artifact, because that is what the page loads.
+import { test } from 'node:test'
+import assert from 'node:assert/strict'
+import { readFile } from 'node:fs/promises'
+import { dirname, resolve } from 'node:path'
+import { fileURLToPath } from 'node:url'
+
+const repoRoot = resolve(dirname(fileURLToPath(import.meta.url)), '..')
+const source = await readFile(resolve(repoRoot, 'client.js'), 'utf8')
+
+/** The smallest React this package can run on, plus a way to run effects on demand. */
+function createReactDouble({ runEffects = false } = {}) {
+  const pending = []
+  return {
+    pending,
+    React: {
+      Fragment: Symbol('Fragment'),
+      createElement: (type, props, ...children) => ({ type, props: props ?? {}, children }),
+      useCallback: (callback) => callback,
+      useEffect: (effect) => {
+        pending.push(effect)
+        // Components here may only touch the DOM from their own effects, so this
+        // is opt-in: ToastLayer's escape-key effect needs a document.
+        if (runEffects) effect()
+      },
+      useSyncExternalStore: (subscribe, getSnapshot) => getSnapshot(),
+    },
+  }
+}
+
+/** Materialize the artifact, then install it, and hand back its three seats. */
+function mount({ runEffects = false } = {}) {
+  const { React, pending } = createReactDouble({ runEffects })
+  let registration
+  const previous = globalThis.window
+  globalThis.window = { __ModuleLoader__: { load: (value) => { registration = value } } }
+  try {
+    // eslint-disable-next-line no-new-func -- executing the artifact IS the test
+    new Function(source)()
+  } finally {
+    globalThis.window = previous
+  }
+  assert.ok(registration, 'the bundle never registered a factory')
+  const exports = registration.factory((specifier) => {
+    assert.equal(specifier, 'react', 'only platform seeds may be requested')
+    return React
+  })
+
+  const effects = []
+  const registrations = []
+  exports.apply({
+    get: () => undefined,
+    effect: (callback, label) => {
+      effects.push(label)
+      return () => {}
+    },
+    slots: {
+      inject: (name, setup) => setup(),
+      register: (definition, component) => {
+        registrations.push({ definition, component })
+        return { dispose() {} }
+      },
+    },
+  })
+  const [toasts, config, observer] = registrations
+  return { toasts, config, observer, pending, effects }
+}
+
+/** Walk a rendered element tree, collecting text, host types and every element. */
+function walk(node, collected = { text: [], types: [], elements: [] }) {
+  if (node === null || node === undefined || typeof node === 'boolean') return collected
+  if (Array.isArray(node)) {
+    for (const child of node) walk(child, collected)
+    return collected
+  }
+  if (typeof node === 'string' || typeof node === 'number') {
+    collected.text.push(String(node))
+    return collected
+  }
+  if (typeof node.type === 'function') {
+    walk(node.type(node.props), collected)
+    return collected
+  }
+  collected.types.push(node.type)
+  collected.elements.push(node)
+  // The double stores a `createElement` call's children on the element itself,
+  // exactly where React's own elements keep them.
+  walk(node.children, collected)
+  return collected
+}
+
+const flatten = (node) => walk(node).text.join(' ')
+const classesOf = (rendered) => rendered.elements.map((element) => element.props.className ?? '')
+
+/**
+ * The permission hint the plugin shows on this machine. Node exposes a
+ * `navigator` too, so the platform branch is exercised here rather than falling
+ * through to the neutral copy.
+ */
+const HINT_BY_PLATFORM = {
+  win32: 'Windows Settings → System → Notifications → DeepSeek Harness',
+  darwin: 'System Settings → Notifications → DeepSeek Harness',
+  linux: 'Allow DeepSeek Harness in your desktop notification settings (GNOME / KDE)',
+}
+const platformHint = HINT_BY_PLATFORM[process.platform] ?? 'Allow DeepSeek Harness in your system notification settings'
+
+test('the plugin page reads as three groups with copy, not raw keys', () => {
+  const { config } = mount()
+  const rendered = walk(config.component({ ...config.definition.inject(), view: 'page' }))
+  const text = rendered.text.join(' ')
+
+  // No locale service in this context, so the seat falls back to English.
+  for (const copy of [
+    'Every alert comes from this page',
+    'What to notify about',
+    'The switches are stored in this browser',
+    'Popup',
+    'Auto-close',
+    '6s',
+    'Never',
+    'Hovering a card pauses the countdown',
+    'System notification permission',
+    'This environment cannot show system notifications',
+    platformHint,
+    'Status',
+    'Window',
+    'Session watch',
+    'Last delivery',
+    'nothing delivered yet',
+    'Replay',
+    'Test alert',
+  ]) {
+    assert.ok(text.includes(copy), `the page is missing: ${copy}`)
+  }
+  assert.ok(!text.includes('config.'), 'a raw translation key reached the page')
+  assert.ok(!text.includes('settings.'), 'a raw translation key reached the page')
+
+  const classes = classesOf(rendered)
+  for (const className of [
+    'dsn-page',
+    'dsn-lede',
+    'dsn-group',
+    'dsn-group-title',
+    'dsn-group-note',
+    'dsn-list',
+    'dsn-row',
+    'dsn-row-title',
+    'dsn-state',
+    'dsn-chips',
+    'dsn-chip',
+    'dsn-facts',
+    'dsn-fact-key',
+    'dsn-fact-value',
+    'dsn-button',
+  ]) {
+    assert.ok(classes.includes(className), `the page is missing .${className}`)
+  }
+  // Three switches, five lifetime choices, one status dot, and the readings as
+  // key/value pairs.
+  assert.equal(classes.filter((className) => className === 'dsn-switch').length, 3)
+  assert.equal(classes.filter((className) => className === 'dsn-chip').length, 5)
+  assert.equal(classes.filter((className) => className === 'dsn-dot is-muted').length, 1)
+  assert.equal(classes.filter((className) => className === 'dsn-fact-key').length, 4)
+  assert.equal(classes.filter((className) => className === 'dsn-fact-value').length, 4)
+})
+
+test('the popup lifetime is a real choice: the page reads it and writes it back', () => {
+  const { config } = mount()
+  const props = config.definition.inject()
+
+  const chips = (componentProps) => walk(config.component({ ...componentProps, view: 'page' }))
+    .elements.filter((element) => element.props.className === 'dsn-chip')
+  const labelOf = (chip) => walk(chip).text.join('')
+  const checkedOf = (list) => list.filter((chip) => chip.props['aria-checked'] === true).map(labelOf)
+
+  const before = chips(props)
+  assert.deepEqual(before.map(labelOf), ['3s', '6s', '10s', '30s', 'Never'])
+  assert.deepEqual(checkedOf(before), ['6s'], 'the shipped default is preselected')
+  assert.equal(before[0].props.role, 'radio')
+  assert.equal(walk(config.component({ ...props, view: 'page' })).elements.find((element) => element.props.className === 'dsn-chips').props.role, 'radiogroup')
+
+  // "Never" is the zero choice, and choosing it goes through the plugin's own
+  // action: the store the popup stack reads is updated, not just the button.
+  before[4].props.onClick()
+  assert.equal(props.store.getSnapshot().dismissAfterMs, 0)
+  assert.deepEqual(checkedOf(chips(props)), ['Never'])
+
+  before[0].props.onClick()
+  assert.equal(props.store.getSnapshot().dismissAfterMs, 3000)
+  assert.deepEqual(checkedOf(chips(props)), ['3s'])
+})
+
+test('the page follows the store: switches, permission state and delivery facts', () => {
+  const { config } = mount()
+  const props = config.definition.inject()
+
+  props.store.set({
+    ...props.store.getSnapshot(),
+    kinds: { completion: false, approval: true, question: true },
+  })
+  const switched = walk(config.component({ ...props, view: 'page' }))
+  assert.deepEqual(
+    switched.elements
+      .filter((element) => element.props.className === 'dsn-switch')
+      .map((element) => element.props['aria-checked']),
+    [false, true, true],
+  )
+
+  props.store.set({
+    ...props.store.getSnapshot(),
+    permission: 'granted',
+    lastDelivery: { outcome: 'system', shown: true, at: '17:52:30', title: 'Conversation finished' },
+  })
+  const granted = walk(config.component({ ...props, view: 'page' }))
+  const grantedClasses = classesOf(granted)
+  // A healthy permission has no warning colour and the button becomes the
+  // channel-specific test.
+  assert.equal(grantedClasses.includes('dsn-dot is-muted'), false)
+  assert.equal(grantedClasses.includes('dsn-dot is-error'), false)
+  assert.ok(grantedClasses.includes('dsn-dot'))
+  assert.ok(granted.text.join(' ').includes('Test system notification'))
+  assert.ok(granted.text.join(' ').includes('17:52:30 · system notification (confirmed on screen)'))
+  assert.ok(grantedClasses.includes('dsn-fact-title'))
+
+  props.store.set({
+    ...props.store.getSnapshot(),
+    permission: 'denied',
+    lastDelivery: null,
+  })
+  const denied = walk(config.component({ ...props, view: 'page' }))
+  const deniedText = denied.text.join(' ')
+  assert.ok(classesOf(denied).includes('dsn-dot is-error'))
+  assert.ok(deniedText.includes('switched off in system settings'))
+  assert.ok(deniedText.includes(platformHint))
+  assert.ok(deniedText.includes('nothing delivered yet'))
+})
+
+test('the summary view is the one-line description the plugin row shows', () => {
+  const { config } = mount()
+  const text = flatten(config.component({ ...config.definition.inject(), view: 'summary' }))
+  assert.equal(text.trim(), 'A system notification while the window is in the background, a light in-app popup while it is in the foreground; the conversation on screen is never interrupted.')
+})
+
+test('the popup stack renders nothing while empty, and one card per alert', () => {
+  const { toasts } = mount()
+  const props = toasts.definition.inject()
+  assert.equal(toasts.component(props), null)
+
+  props.store.set({
+    ...props.store.getSnapshot(),
+    toasts: [{ id: 'dsn-1', kind: 'approval', title: 'Approval required', body: 'Conversation: Bash is waiting for your approval', sessionId: 'session-1' }],
+  })
+  const rendered = walk(toasts.component(props))
+  const text = rendered.text.join(' ')
+  assert.ok(text.includes('Approval required'))
+  assert.ok(text.includes('Bash is waiting for your approval'))
+  assert.ok(text.includes('View'))
+
+  const classes = classesOf(rendered)
+  for (const className of ['dsn-stack', 'dsn-toast', 'dsn-toast-icon is-approval', 'dsn-toast-title', 'dsn-toast-desc', 'dsn-toast-action', 'dsn-toast-close']) {
+    assert.ok(classes.includes(className), `the popup is missing .${className}`)
+  }
+  // The close control is a square hit area with an icon only, so its label is
+  // the only accessible name it has.
+  assert.equal(
+    rendered.elements.find((element) => element.props.className === 'dsn-toast-close').props['aria-label'],
+    'Dismiss',
+  )
+  // The stack announces itself politely, and an approval is an alert, not a status.
+  assert.equal(rendered.elements.find((element) => element.props.className === 'dsn-stack').props['aria-live'], 'polite')
+  assert.equal(rendered.elements.find((element) => element.props.className === 'dsn-toast').props.role, 'alert')
+})
+
+test('the popup buttons call back into the plugin, and the card pauses its own lifetime', () => {
+  const { toasts } = mount()
+  const called = []
+  const props = {
+    ...toasts.definition.inject(),
+    dismiss: (id) => called.push(['dismiss', id]),
+    open: (sessionId) => called.push(['open', sessionId]),
+    arm: (id) => called.push(['arm', id]),
+    hold: (id) => called.push(['hold', id]),
+  }
+  props.store.set({
+    ...props.store.getSnapshot(),
+    toasts: [{ id: 'dsn-7', kind: 'question', title: 'Answer needed', body: 'A · continue?', sessionId: 'session-9' }],
+  })
+  const rendered = walk(toasts.component(props))
+  const card = rendered.elements.find((element) => element.props.className === 'dsn-toast')
+  const [view, close] = rendered.elements.filter((element) => typeof element.props.onClick === 'function')
+
+  card.props.onMouseEnter()
+  card.props.onMouseLeave()
+  view.props.onClick()
+  close.props.onClick()
+
+  assert.deepEqual(called, [
+    ['hold', 'dsn-7'],
+    ['arm', 'dsn-7'],
+    ['dismiss', 'dsn-7'],
+    ['open', 'session-9'],
+    ['dismiss', 'dsn-7'],
+  ])
+})
+
+test('the observer reports its own health once the session hooks arrive', () => {
+  const { observer, toasts, effects } = mount({ runEffects: true })
+  const store = toasts.definition.inject().store
+  const observation = observer.definition.inject().observation
+
+  // Health changes that are not `watching` also reach the tagged console, so the
+  // diagnostic is captured and asserted instead of polluting the test output.
+  // Note which way round it fires: the observer logs when it recovers from a
+  // degraded state, and it logs the initial transition, but a healthy observer
+  // turning silent reaches the console only as the settings page's own error line.
+  const logged = []
+  const originalError = console.error
+  console.error = (message) => logged.push(String(message))
+  try {
+    observer.component({
+      observation,
+      useSessions: (select) => select({ byId: {} }),
+      useSessionStatus: (select) => select(new Map()),
+    })
+    assert.equal(store.getSnapshot().health.state, 'watching')
+
+    observer.component({ observation, useSessions: undefined, useSessionStatus: undefined })
+    assert.equal(store.getSnapshot().health.state, 'noHooks')
+
+    observer.component({
+      observation,
+      useSessions: (select) => select({ byId: {} }),
+      useSessionStatus: (select) => select(new Map()),
+    })
+    assert.equal(store.getSnapshot().health.state, 'watching')
+  } finally {
+    console.error = originalError
+  }
+  assert.equal(logged.length, 2, `expected two health diagnostics, got ${JSON.stringify(logged)}`)
+  for (const line of logged) assert.match(line, /session-notify: observer health: watching\b/)
+
+  // The observer owns no visible UI, and it is registered without a seat locale.
+  assert.equal(observer.definition.id, 'session-notify-watch')
+  assert.equal(observer.definition.order, 101)
+  assert.equal(observer.component({ observation }), null)
+  assert.deepEqual(effects, ['session-notify: dictionaries', 'session-notify: window focus', 'session-notify: disposal'])
+})
@@ -0,0 +1,83 @@
+// The copy table: what a candidate becomes on screen, and how the settings page
+// describes the newest delivery. Assertions use the real Chinese dictionary, so
+// a key rename in the dictionaries and a rename here cannot drift apart.
+import { test } from 'node:test'
+import assert from 'node:assert/strict'
+
+import { createCopy } from '../../src/client/core/copy.js'
+import { createTranslator } from '../../src/client/i18n/index.js'
+
+const t = createTranslator({ getSnapshot: () => ({ active: 'zh' }) })
+const { copyFor, deliveryFacts, replayValue } = createCopy(t)
+
+/** One trigger candidate with every field a caller may leave empty. */
+function candidate(overrides) {
+  return { kind: 'completion', sessionId: 'session-1', title: '标题', detail: '', pendingKind: '', ...overrides }
+}
+
+test('a finished conversation says what happened in the heading, and the conversation in the description', () => {
+  // The heading already carries "finished", so the description is the title alone.
+  assert.deepEqual(copyFor(candidate()), {
+    kind: 'completion',
+    title: '会话已完成',
+    body: '标题',
+  })
+})
+
+test('an empty title falls back to the untitled copy', () => {
+  assert.equal(copyFor(candidate({ title: '' })).body, '未命名会话')
+})
+
+test('an approval names the waiting tool when the client publishes one', () => {
+  const notice = copyFor(candidate({ kind: 'approval', pendingKind: 'approval', detail: 'Bash' }))
+  assert.deepEqual(notice, {
+    kind: 'approval',
+    title: '需要授权',
+    body: '标题：工具 Bash 正在等待你的授权',
+  })
+})
+
+test('an approval without a tool name still says what is happening', () => {
+  const notice = copyFor(candidate({ kind: 'approval', pendingKind: 'approval', detail: '' }))
+  assert.equal(notice.body, '标题：有工具正在等待你的授权')
+})
+
+test('a question carries the question text', () => {
+  assert.deepEqual(
+    copyFor(candidate({ kind: 'question', pendingKind: 'question', detail: '要继续吗？' })),
+    { kind: 'question', title: '需要回答', body: '标题 · 要继续吗？' },
+  )
+  assert.equal(copyFor(candidate({ kind: 'question', pendingKind: 'question', detail: '' })).body, '标题：正在等待你的回答')
+})
+
+test('a plan review says what it is instead of repeating the plan text', () => {
+  // A plan review arrives as `kind: 'question'` with its own discriminator, so the
+  // discriminator has to be read first — otherwise the plan-review copy is unreachable.
+  const review = copyFor(candidate({ kind: 'question', pendingKind: 'plan-review', detail: '计划正文…' }))
+  assert.equal(review.kind, 'question')
+  assert.equal(review.body, '标题：计划正在等待你确认')
+  assert.equal(review.title, '需要回答')
+})
+
+test('a delivery that never happened has no facts to show', () => {
+  assert.equal(deliveryFacts(null, t), null)
+  assert.equal(deliveryFacts(undefined, t), null)
+})
+
+test('the newest delivery is split into time, channel and what it was', () => {
+  assert.deepEqual(
+    deliveryFacts({ outcome: 'system', shown: true, at: '17:52:30', title: '会话已完成' }, t),
+    { at: '17:52:30', outcome: '系统通知（系统已确认弹出）', title: '会话已完成' },
+  )
+  assert.equal(deliveryFacts({ outcome: 'system', shown: undefined, at: '1:00:00', title: 'X' }, t).outcome, '系统通知（系统没有回报，回到窗口时补发轻弹窗）')
+  assert.equal(deliveryFacts({ outcome: 'system', shown: false, at: '1:00:00', title: 'X' }, t).outcome, '系统通知没弹出来，回到窗口时补发轻弹窗')
+  assert.equal(deliveryFacts({ outcome: 'system-refused-threw', at: '1:00:00', title: 'X' }, t).outcome, '系统通知被拒绝，改用了轻弹窗')
+  assert.equal(deliveryFacts({ outcome: 'replay', at: '1:00:00', title: 'X' }, t).outcome, '应用内轻弹窗（回到窗口时补发）')
+  assert.equal(deliveryFacts({ outcome: 'popup', at: '1:00:00', title: 'X' }, t).outcome, '应用内轻弹窗')
+  assert.equal(deliveryFacts({ outcome: 'popup', at: '1:00:00', title: undefined }, t).title, '')
+})
+
+test('the replay value is short enough for one status line', () => {
+  assert.equal(replayValue(0, t), '没有')
+  assert.equal(replayValue(3, t), '3 条')
+})
@@ -0,0 +1,93 @@
+// The dictionaries and the translator. The key sets are asserted equal because
+// the translator falls back to whichever dictionary has a key: an asymmetric key
+// would silently switch language instead of failing, and a key nobody reads is a
+// defect this repository has removed once already.
+import { test } from 'node:test'
+import assert from 'node:assert/strict'
+
+import { createTranslator, dictionaries, registerDictionaries } from '../../src/client/i18n/index.js'
+import { zh } from '../../src/client/i18n/zh.js'
+import { en } from '../../src/client/i18n/en.js'
+
+test('both dictionaries carry exactly the same keys', () => {
+  assert.deepEqual(Object.keys(zh).sort(), Object.keys(en).sort())
+  assert.deepEqual(Object.keys(dictionaries).sort(), ['en', 'zh'])
+})
+
+test('every key carries copy in both languages', () => {
+  for (const [key, value] of Object.entries(zh)) {
+    assert.equal(typeof value, 'string', `${key} is not a string in zh`)
+    assert.notEqual(value, '', `${key} is empty in zh`)
+  }
+  for (const [key, value] of Object.entries(en)) {
+    assert.equal(typeof value, 'string', `${key} is not a string in en`)
+    assert.notEqual(value, '', `${key} is empty in en`)
+  }
+})
+
+test('the seat translation wins, and a key it does not know falls back to the dictionary', () => {
+  const locale = {
+    bind: (namespace) => {
+      assert.equal(namespace, 'session-notify')
+      return (key, params) => (key === 'notification.completion' ? `seat:${params?.title ?? ''}` : key)
+    },
+    getSnapshot: () => ({ active: 'zh' }),
+  }
+  const t = createTranslator(locale)
+  assert.equal(t('notification.completion', { title: 'X' }), 'seat:X')
+  assert.equal(t('body.untitled'), '未命名会话')
+})
+
+test('the active language selects the dictionary, and an unknown key renders itself', () => {
+  const t = createTranslator({ bind: () => undefined, getSnapshot: () => ({ active: 'zh-CN' }) })
+  assert.equal(t('body.untitled'), '未命名会话')
+
+  const english = createTranslator(undefined)
+  assert.equal(english('body.untitled'), 'Untitled conversation')
+  assert.equal(english('nope.not.a.key'), 'nope.not.a.key')
+})
+
+test('interpolation replaces every known placeholder and leaves unknown ones alone', () => {
+  const t = createTranslator({ getSnapshot: () => ({ active: 'en' }) })
+  assert.equal(t('body.approval', { title: 'A', tool: 'Bash' }), 'A: Bash is waiting for your approval')
+  assert.equal(t('body.approval', { title: 'A' }), 'A: {tool} is waiting for your approval')
+  assert.equal(t('body.untitled', { unused: 'x' }), 'Untitled conversation')
+})
+
+test('a locale service that throws on every call keeps the copy renderable', () => {
+  const t = createTranslator({
+    bind: () => {
+      throw new Error('no such namespace')
+    },
+    getSnapshot: () => {
+      throw new Error('no snapshot')
+    },
+  })
+  assert.equal(t('body.untitled'), 'Untitled conversation')
+})
+
+test('registration prefers the typed form and falls back to one call per locale', () => {
+  const typed = []
+  const disposeTyped = registerDictionaries({ register: (ns, dict) => { typed.push([ns, dict]); return () => {} } })
+  assert.deepEqual(typed, [['session-notify', dictionaries]])
+  assert.equal(typeof disposeTyped, 'function')
+
+  const single = []
+  let disposed = 0
+  const disposeSingle = registerDictionaries({
+    register: (ns, id, dict) => {
+      if (typeof id === 'object') throw new Error('typed form unsupported')
+      single.push([ns, id, dict])
+      return () => { disposed += 1 }
+    },
+  })
+  assert.deepEqual(single.map(([ns, id]) => [ns, id]), [['session-notify', 'zh'], ['session-notify', 'en']])
+  disposeSingle()
+  assert.equal(disposed, 2)
+})
+
+test('a profile without a locale service is not an error', () => {
+  assert.equal(typeof registerDictionaries(undefined), 'function')
+  assert.doesNotThrow(() => registerDictionaries(undefined)())
+  assert.equal(createTranslator(undefined)('body.untitled'), 'Untitled conversation')
+})
@@ -0,0 +1,102 @@
+// The pure derivations over the client's own session state: what counts as a
+// served pending interaction, what a title or a preview becomes, which
+// conversation is on screen, and whether a queued alert is still owed.
+import { test } from 'node:test'
+import assert from 'node:assert/strict'
+
+import {
+  isOnScreen,
+  preview,
+  questionText,
+  servedPendingKind,
+  stillOwed,
+  titleOf,
+} from '../../src/client/core/session.js'
+
+test('only the three interaction kinds the domains publish are served', () => {
+  // The literals the shipped domains publish: dsh-client-ui-approval sets
+  // `kind = "approval"`, dsh-client-ui-user-questions picks between `"question"`
+  // and `"plan-review"` for one batch.
+  assert.equal(servedPendingKind({ kind: 'approval' }), 'approval')
+  assert.equal(servedPendingKind({ kind: 'question' }), 'question')
+  assert.equal(servedPendingKind({ kind: 'plan-review' }), 'plan-review')
+  assert.equal(servedPendingKind({ kind: 'something-else' }), undefined)
+  assert.equal(servedPendingKind({ kind: 42 }), undefined)
+  assert.equal(servedPendingKind(undefined), undefined)
+  assert.equal(servedPendingKind(null), undefined)
+  assert.equal(servedPendingKind('approval'), undefined)
+})
+
+test('a preview collapses whitespace and never exceeds one popup line', () => {
+  assert.equal(preview('  a\n\t b  '), 'a b')
+  assert.equal(preview(undefined), '')
+  assert.equal(preview('x'.repeat(80)), 'x'.repeat(80))
+  assert.equal(preview('x'.repeat(81)), `${'x'.repeat(79)}…`)
+})
+
+test('the first question text is read across every shape the client publishes', () => {
+  assert.equal(questionText({ questions: [{ question: '继续吗？' }] }), '继续吗？')
+  assert.equal(questionText({ questions: [{ text: '继续吗？' }] }), '继续吗？')
+  assert.equal(questionText({ question: '继续吗？' }), '继续吗？')
+  assert.equal(questionText({ prompt: '继续吗？' }), '继续吗？')
+  assert.equal(questionText({ displayReason: { text: '继续吗？' } }), '继续吗？')
+  assert.equal(questionText({ reason: { text: '继续吗？' } }), '继续吗？')
+  assert.equal(questionText({}), '')
+  assert.equal(questionText(null), '')
+  assert.equal(questionText('继续吗？'), '')
+})
+
+test('a session title falls back to its identity', () => {
+  assert.equal(titleOf({ title: '  会话 A  ' }, 'abcdef123456'), '会话 A')
+  assert.equal(titleOf({ title: '' }, 'abcdef123456'), 'abcdef12')
+  assert.equal(titleOf(undefined, 'abcdef123456'), 'abcdef12')
+  assert.equal(titleOf({ title: 42 }, 'abcdef123456'), 'abcdef12')
+})
+
+test('the conversation on screen is the one the main view retains', () => {
+  const list = { byId: { a: { retainedBy: { mainView: 1 } }, b: { retainedBy: { mainView: 0 } } } }
+  assert.equal(isOnScreen('a', list), true)
+  assert.equal(isOnScreen('b', list), false)
+  assert.equal(isOnScreen('c', list), false)
+  assert.equal(isOnScreen('a', undefined), false)
+})
+
+test('a pending interaction stays owed while it waits, even though the run is still running', () => {
+  // The session is `running` whenever the agent loop is active, and a pending
+  // approval or question is exactly that: the loop is waiting for the human. The
+  // run state must therefore not gate these alerts — it used to drop every one
+  // of them, which is why only completions ever reached the user.
+  const candidate = { kind: 'approval', sessionId: 'a', pendingKind: 'approval', test: false }
+  const status = (pendingInteraction, running) => new Map([['a', { pendingInteraction, running }]])
+
+  assert.equal(stillOwed(candidate, { list: { byId: { a: { running: true } } }, status: status({ kind: 'approval' }, true) }), true)
+  assert.equal(stillOwed(candidate, { list: { byId: { a: { running: false } } }, status: status({ kind: 'approval' }, false) }), true)
+  // Answered inside the settle window: the request is gone, so nothing is owed.
+  assert.equal(stillOwed(candidate, { list: { byId: { a: { running: true } } }, status: status(undefined, true) }), false)
+  // Replaced by a different request of the same kind: a new request is a new alert.
+  assert.equal(stillOwed({ ...candidate, kind: 'question', pendingKind: 'question' }, { list: { byId: {} }, status: status({ kind: 'approval' }, true) }), false)
+  // A plan review is owed on its own discriminator.
+  assert.equal(stillOwed({ ...candidate, kind: 'question', pendingKind: 'plan-review' }, { list: { byId: {} }, status: status({ kind: 'plan-review' }, true) }), true)
+  // Nothing contradicts the request, so it is still the user's move.
+  assert.equal(stillOwed(candidate, { list: { byId: {} }, status: new Map() }), true)
+  assert.equal(stillOwed(candidate, { list: undefined, status: undefined }), true)
+})
+
+test('a completion is owed only while the conversation stayed idle', () => {
+  const candidate = { kind: 'completion', sessionId: 'a', pendingKind: '', test: false }
+  const live = (byId, status) => ({ list: { byId }, status })
+
+  assert.equal(stillOwed(candidate, { list: undefined, status: undefined }), true)
+  assert.equal(stillOwed(candidate, live({ a: { running: false } })), true)
+  assert.equal(stillOwed(candidate, live({})), true)
+  assert.equal(stillOwed(candidate, live({ a: { running: true } })), false)
+  // The per-session selector wins over the list summary, which still carries the
+  // pre-transition flag.
+  assert.equal(stillOwed(candidate, { list: { byId: { a: { running: true } } }, status: new Map([['a', { running: false }]]) }), true)
+})
+
+test('a test alert is always owed', () => {
+  const live = { list: { byId: { a: { running: true } } }, status: new Map([['a', { running: true }]]) }
+  assert.equal(stillOwed({ kind: 'completion', sessionId: 'a', pendingKind: '', test: true }, live), true)
+  assert.equal(stillOwed({ kind: 'approval', sessionId: 'a', pendingKind: 'approval', test: true }, live), true)
+})
@@ -0,0 +1,102 @@
+// The browser-local preferences: the three trigger switches and the popup
+// lifetime. Storage is foreign input: it can be absent, hold another version's
+// shape, or refuse to write, and none of that may stop the plugin — nor may
+// writing one preference ever clear another.
+import { afterEach, test } from 'node:test'
+import assert from 'node:assert/strict'
+
+import {
+  STORAGE_KEY,
+  readStoredDismissMs,
+  readStoredKinds,
+  writeStoredDismissMs,
+  writeStoredKinds,
+} from '../../src/client/core/storage.js'
+import { TOAST_DURATION_MS } from '../../src/client/constants.js'
+
+/** Install a storage double, optionally one that throws. */
+function useStorage(behaviour) {
+  const data = new Map()
+  globalThis.localStorage = {
+    getItem: (key) => {
+      if (behaviour === 'read-throws') throw new Error('denied')
+      return data.has(key) ? data.get(key) : null
+    },
+    setItem: (key, value) => {
+      if (behaviour === 'write-throws') throw new Error('quota')
+      data.set(key, String(value))
+    },
+  }
+  return data
+}
+
+afterEach(() => {
+  delete globalThis.localStorage
+})
+
+test('everything is on, with the shipped popup lifetime, when this browser has no stored choice', () => {
+  useStorage()
+  assert.deepEqual(readStoredKinds(), { completion: true, approval: true, question: true })
+  assert.equal(readStoredDismissMs(), TOAST_DURATION_MS)
+})
+
+test('without storage at all the defaults still apply', () => {
+  assert.deepEqual(readStoredKinds(), { completion: true, approval: true, question: true })
+  assert.equal(readStoredDismissMs(), TOAST_DURATION_MS)
+  assert.doesNotThrow(() => writeStoredKinds({ completion: false, approval: true, question: true }))
+  assert.doesNotThrow(() => writeStoredDismissMs(0))
+})
+
+test('a stored switch survives a round trip, and unknown or broken values do not', () => {
+  const data = useStorage()
+  writeStoredKinds({ completion: false, approval: true, question: false })
+  assert.deepEqual(readStoredKinds(), { completion: false, approval: true, question: false })
+
+  data.set(STORAGE_KEY, '{ not json')
+  assert.deepEqual(readStoredKinds(), { completion: true, approval: true, question: true })
+
+  data.set(STORAGE_KEY, JSON.stringify({ completion: 'yes', approval: false }))
+  assert.deepEqual(readStoredKinds(), { completion: true, approval: false, question: true })
+
+  data.set(STORAGE_KEY, JSON.stringify({ somethingElse: false }))
+  assert.deepEqual(readStoredKinds(), { completion: true, approval: true, question: true })
+})
+
+test('the popup lifetime survives a round trip, including "never"', () => {
+  const data = useStorage()
+  writeStoredDismissMs(30000)
+  assert.equal(readStoredDismissMs(), 30000)
+
+  writeStoredDismissMs(0)
+  assert.equal(readStoredDismissMs(), 0, 'zero means the card waits for the user')
+
+  // A value this version does not offer is ignored rather than trusted.
+  data.set(STORAGE_KEY, JSON.stringify({ dismissAfterMs: 1234 }))
+  assert.equal(readStoredDismissMs(), TOAST_DURATION_MS)
+  data.set(STORAGE_KEY, JSON.stringify({ dismissAfterMs: -1 }))
+  assert.equal(readStoredDismissMs(), TOAST_DURATION_MS)
+  data.set(STORAGE_KEY, JSON.stringify({ dismissAfterMs: '6000' }))
+  assert.equal(readStoredDismissMs(), TOAST_DURATION_MS)
+})
+
+test('writing one preference keeps every other one', () => {
+  useStorage()
+  writeStoredKinds({ completion: false, approval: false, question: false })
+  writeStoredDismissMs(0)
+  assert.deepEqual(readStoredKinds(), { completion: false, approval: false, question: false })
+  assert.equal(readStoredDismissMs(), 0)
+
+  // …and the other way round: the switches do not reset the lifetime.
+  writeStoredKinds({ completion: true, approval: true, question: true })
+  assert.equal(readStoredDismissMs(), 0)
+})
+
+test('storage that refuses to be read or written never throws', () => {
+  useStorage('read-throws')
+  assert.deepEqual(readStoredKinds(), { completion: true, approval: true, question: true })
+  assert.equal(readStoredDismissMs(), TOAST_DURATION_MS)
+
+  useStorage('write-throws')
+  assert.doesNotThrow(() => writeStoredKinds({ completion: false, approval: false, question: false }))
+  assert.doesNotThrow(() => writeStoredDismissMs(3000))
+})
@@ -0,0 +1,81 @@
+// The stylesheet's two contracts, both of which the popup broke once:
+//
+// 1. it may only paint with theme tokens — a literal color cannot follow the
+//    shell's light/dark switch, and a `--dsw-static-*` token is fixed by design;
+// 2. the popup must use the same floating-surface recipe as the shipped menus and
+//    modals (surface + hairline + elevation + label tokens), not the fixed dark
+//    `--dsw-alias-toast-bg` that made it a black slab on a light page.
+import { test } from 'node:test'
+import assert from 'node:assert/strict'
+
+import { CSS } from '../../src/client/ui/styles.js'
+
+/** Every `property:value` declaration in the sheet, selector-less. */
+function declarations(sheet) {
+  return [...sheet.matchAll(/([a-z-]+)\s*:\s*([^;{}]+);/g)].map((match) => ({ property: match[1], value: match[2].trim() }))
+}
+
+const COLOR_LITERAL = /#[0-9a-fA-F]{3,8}\b|\b(?:rgb|rgba|hsl|hsla|oklch|lab)\(|\b(?:white|black|red|green|blue|gray|grey)\b/
+
+test('the stylesheet paints with tokens and never with a literal color', () => {
+  const properties = ['color', 'background', 'background-color', 'border', 'border-top', 'border-color', 'box-shadow', 'outline']
+  const painted = declarations(CSS).filter(({ property }) => properties.includes(property))
+  assert.ok(painted.length > 20, 'expected the sheet to carry its painted declarations')
+
+  for (const { property, value } of painted) {
+    // Keyword values carry no color of their own.
+    if (/^(none|transparent|inherit|currentColor)$/.test(value)) continue
+    assert.ok(!COLOR_LITERAL.test(value), `${property}: ${value} hardcodes a color instead of using a theme token`)
+    assert.ok(!value.includes('--dsw-static-'), `${property}: ${value} uses a theme-fixed static token that cannot follow dark mode`)
+  }
+})
+
+test('the popup is the shipped floating-card recipe, in both themes', () => {
+  const toast = CSS.match(/\.dsn-toast\{([^}]*)\}/)?.[1]
+  assert.ok(toast !== undefined, 'the popup rule is missing')
+
+  // The surface, the hairline and the shadow are what DSH's menus and modals use.
+  assert.ok(toast.includes('background:var(--dsw-alias-bg-layer-2)'), 'the popup must sit on the elevated layer surface')
+  assert.ok(toast.includes('--dsw-elevation-stroke-color:var(--dsw-alias-border-l1)'), 'the popup must take the menu hairline')
+  assert.ok(toast.includes('box-shadow:var(--dsw-elevation-prominent)'), 'the popup must take the prominent elevation')
+  assert.ok(toast.includes('color:var(--dsw-alias-label-primary)'), 'the popup text must be the primary label token')
+  assert.ok(toast.includes('border-radius:var(--dsw-radius-lg)'), 'the popup must take the large radius')
+  assert.ok(toast.includes('var(--ds-transition-duration') && toast.includes('var(--ds-ease-in-out'), 'the entrance must use the shell motion tokens')
+
+  // The one thing it must not do: the fixed dark toast slab, or any of its labels.
+  assert.ok(!toast.includes('--dsw-alias-toast-'), 'the popup must not use the theme-fixed toast surface')
+  assert.ok(!CSS.includes('--dsw-alias-toast-'), 'no rule may fall back to the fixed toast surface')
+})
+
+test('the popup reads as one card: title, body and both controls use label tokens', () => {
+  const rule = (name) => CSS.match(new RegExp(`\\.${name}\\{([^}]*)\\}`))?.[1] ?? ''
+  assert.ok(rule('dsn-toast-title').includes('var(--dsw-alias-label-primary)'))
+  assert.ok(rule('dsn-toast-desc').includes('var(--dsw-alias-label-secondary)'))
+  assert.ok(rule('dsn-toast-close').includes('color:var(--dsw-alias-label-tertiary)'))
+  assert.ok(rule('dsn-toast-action').includes('var(--dsw-alias-state-business-primary)'))
+  // Hover feedback comes from the shared interactive token, not a hand-rolled color.
+  assert.ok(rule('dsn-toast-action:hover').includes('var(--dsw-alias-interactive-bg-hover)'))
+  assert.ok(rule('dsn-toast-close:hover').includes('var(--dsw-alias-interactive-bg-hover)'))
+})
+
+test('the three popup glyphs stay distinguishable through state tokens', () => {
+  assert.ok(CSS.includes('.dsn-toast-icon{') && CSS.includes('var(--dsw-alias-state-warn-label)'))
+  assert.ok(CSS.includes('.dsn-toast-icon.is-completion{color:var(--dsw-alias-state-success-primary)}'))
+  assert.ok(CSS.includes('.dsn-toast-icon.is-question{color:var(--dsw-alias-state-business-primary)}'))
+})
+
+test('every class the components render has a rule, so nothing falls back to defaults', () => {
+  // Guards the redesign: a renamed class that the sheet no longer styles would
+  // render as an unstyled block instead of failing loudly.
+  const expected = [
+    'dsn-stack', 'dsn-toast', 'dsn-toast-icon', 'dsn-toast-icon is-completion', 'dsn-toast-icon is-question',
+    'dsn-toast-text', 'dsn-toast-title', 'dsn-toast-desc', 'dsn-toast-actions', 'dsn-toast-action', 'dsn-toast-close',
+    'dsn-page', 'dsn-lede', 'dsn-group', 'dsn-group-title', 'dsn-group-note', 'dsn-list', 'dsn-row', 'dsn-row-text',
+    'dsn-row-title', 'dsn-row-sub', 'dsn-state', 'dsn-dot', 'dsn-chips', 'dsn-chip', 'dsn-facts', 'dsn-fact-key',
+    'dsn-fact', 'dsn-fact-value', 'dsn-fact-title', 'dsn-switch', 'dsn-thumb', 'dsn-button',
+  ]
+  for (const className of expected) {
+    const selector = `.${className.split(' ').join('.')}`
+    assert.ok(CSS.includes(`${selector}{`) || CSS.includes(`${selector}[`) || CSS.includes(`${selector}:`) || CSS.includes(`${selector}.`), `no rule for ${selector}`)
+  }
+})
@@ -0,0 +1,100 @@
+// The popup stack's lifetime: the user's choice decides it, and "never" really
+// means the card waits for the user rather than for a timer.
+import { test } from 'node:test'
+import assert from 'node:assert/strict'
+
+import { createStore } from '../../src/client/core/store.js'
+import { createToastStack } from '../../src/client/core/toasts.js'
+import { createCopy } from '../../src/client/core/copy.js'
+import { createTranslator } from '../../src/client/i18n/index.js'
+import { TOAST_DURATION_MS } from '../../src/client/constants.js'
+
+const tr = createTranslator({ getSnapshot: () => ({ active: 'zh' }) })
+const candidate = { kind: 'completion', sessionId: 's1', title: '标题', detail: '', pendingKind: '' }
+
+/** A stack over a store whose only interesting field is the popup lifetime. */
+function stack(dismissAfterMs) {
+  const store = createStore({ dismissAfterMs, toasts: [] })
+  return { store, toasts: createToastStack({ store, copy: createCopy(tr) }) }
+}
+
+const ids = (store) => store.getSnapshot().toasts.map((toast) => toast.id)
+
+test('a card closes itself after the configured lifetime', (context) => {
+  context.mock.timers.enable({ apis: ['setTimeout'] })
+  const { store, toasts } = stack(6000)
+  toasts.showToast(candidate)
+
+  assert.equal(ids(store).length, 1)
+  context.mock.timers.tick(5999)
+  assert.equal(ids(store).length, 1, 'the card must outlive its countdown')
+  context.mock.timers.tick(1)
+  assert.deepEqual(ids(store), [])
+})
+
+test('a lifetime of zero leaves the card until it is dismissed', (context) => {
+  context.mock.timers.enable({ apis: ['setTimeout'] })
+  const { store, toasts } = stack(0)
+  toasts.showToast(candidate)
+
+  context.mock.timers.tick(60 * 60 * 1000)
+  assert.equal(ids(store).length, 1, 'nothing may close a "never" card')
+
+  toasts.closeToast(ids(store)[0])
+  assert.deepEqual(ids(store), [])
+})
+
+test('hovering holds the card, and the lifetime chosen while held applies afterwards', (context) => {
+  context.mock.timers.enable({ apis: ['setTimeout'] })
+  const { store, toasts } = stack(3000)
+  toasts.showToast(candidate)
+  const id = ids(store)[0]
+
+  toasts.holdToast(id)
+  context.mock.timers.tick(30 * 1000)
+  assert.equal(ids(store).length, 1, 'a held card has no timer left')
+
+  // The settings page switches to "never" while the pointer is still on the card.
+  store.set({ ...store.getSnapshot(), dismissAfterMs: 0 })
+  toasts.armToast(id)
+  context.mock.timers.tick(60 * 60 * 1000)
+  assert.equal(ids(store).length, 1)
+})
+
+test('a lifetime change applies to the cards already on screen, but never to a held one', (context) => {
+  context.mock.timers.enable({ apis: ['setTimeout'] })
+  const { store, toasts } = stack(30000)
+  toasts.showToast(candidate)
+  toasts.showToast({ ...candidate, sessionId: 's2' })
+  const [newest, oldest] = ids(store)
+  toasts.holdToast(oldest)
+
+  // The settings page shortens the lifetime while both cards are visible.
+  store.set({ ...store.getSnapshot(), dismissAfterMs: 3000 })
+  toasts.rearmAll()
+  context.mock.timers.tick(3000)
+  assert.deepEqual(ids(store), [oldest], 'the visible card followed the new choice, the held one did not')
+
+  toasts.armToast(oldest)
+  context.mock.timers.tick(3000)
+  assert.deepEqual(ids(store), [], 'once the pointer leaves, the held card counts down again')
+  void newest
+})
+
+test('a lifetime this version cannot use falls back to the shipped default', (context) => {
+  context.mock.timers.enable({ apis: ['setTimeout'] })
+  const { store, toasts } = stack(undefined)
+  toasts.showToast(candidate)
+
+  context.mock.timers.tick(TOAST_DURATION_MS)
+  assert.deepEqual(ids(store), [])
+})
+
+test('the stack never grows past its bound, however long the cards live', (context) => {
+  context.mock.timers.enable({ apis: ['setTimeout'] })
+  const { store, toasts } = stack(0)
+  for (let index = 0; index < 5; index += 1) toasts.showToast({ ...candidate, sessionId: `s${index}` })
+
+  assert.equal(ids(store).length, 3)
+  assert.deepEqual(ids(store), ['dsn-5', 'dsn-4', 'dsn-3'], 'newest first')
+})
Author	SHA1	Message	Date
pyh	2f89dd90e5	📝 docs: 记录 v1.0.10 的弹窗时长与完成提醒文案	2026-10-05 00:29:37 +08:00
pyh	5efb311194	✅ test: 覆盖弹窗生命周期、存储合并与插件页的时长选项	2026-10-05 00:29:36 +08:00
pyh	faa3930ae8	✨ feat(client): 弹窗可设自动关闭时间，完成提醒描述只显示标题	2026-10-05 00:29:36 +08:00
pyh	9218521dcb	📝 docs: 记录 v1.0.9 的弹窗样式改版	2026-10-05 00:20:59 +08:00
pyh	43875b991b	✅ test: 钉住样式表只用主题令牌与 DSH 浮层配方	2026-10-05 00:20:59 +08:00
pyh	8aa002b485	✨ feat(client): 轻弹窗改成跟随主题的 DSH 浮层卡片	2026-10-05 00:20:59 +08:00
pyh	ac6963279c	📝 docs: 记录 v1.0.8 的提醒修复与插件页改版	2026-10-04 19:24:03 +08:00
pyh	302e0a8bf5	✅ test: 补上待处理请求与页面结构的回归用例	2026-10-04 19:24:03 +08:00
pyh	ec8661b317	✨ feat(client): 插件页改为三组列表与键值状态，权限带状态点	2026-10-04 19:24:03 +08:00
pyh	074cdccdb9	🐛 fix(client): 授权与提问提醒不再被运行状态丢掉	2026-10-04 19:24:02 +08:00
pyh	248619ffc3	📝 docs: 说明仓库结构与维护者命令，记录 v1.0.7	2026-10-04 19:01:23 +08:00
pyh	99bbf0cc1e	✅ test: 补上纯函数、产物冒烟与组件渲染测试，守护产物新鲜度	2026-10-04 19:01:23 +08:00
pyh	68ab60273e	♻️ refactor(client): 浏览器半拆成 src 模块，client.js 改由构建产出	2026-10-04 19:01:22 +08:00