docs(sdk): clarify unknown user time zone

packages/bundle/sdk-app/README.i18n.yaml

@@ -33,8 +33,8 @@
   en: 0503df0971e5f8d7
   zh: 18cae8c6e25cda04
 /deepseek-ai-dsh-sdk-app/known-limitations-and-deferred-work:
-  en: e72eec2652f06741
-  zh: 520fe70fffeaabe8
+  en: 451497677de7e6b9
+  zh: dcfdc671c38d54d4
 /deepseek-ai-dsh-sdk-app/known-limitations-and-deferred-work/dev-note:
   en: e67f633dc6fe7773
   zh: e88aeb617ffb74ea

packages/bundle/sdk-app/README.md

@@ -61,6 +61,7 @@ The static prefix is stable for a fixed profile, provider, model, and tool roste
 <a id="known-limitations-and-deferred-work"></a>
 
 - **No graphical client** — file cards, native file opening, and browser state require an embedding client; the SDK starts no Web server.
+- **User time zone is unknown** — the SDK protocol does not carry a user time zone, so time context reports `Browser time zone for this request: unavailable.` The process or container time zone may differ from the user's. The `time-context.timeZone` setting only controls fallback timestamp formatting; it does not establish the user's time zone. Automatic detection and SDK time-zone input are deferred.
 - **Questions require an answerer** — configure `onUserQuestion` in TypeScript or `on_user_question` in Python, or supply a native `user-questions/request` handler; otherwise `ask_user_question` returns `NO_PROVIDER`.
 - **Schedules share the runtime lifetime** — delivery needs a running process and its persistent Session storage.
 - **A profile can omit the SDK server** — a custom profile selected by the TypeScript client must retain this bundle or another `dsh-sdk-jsonrpc-server` row; client initialization fails when no peer answers.

packages/bundle/sdk-app/README.zh.md

@@ -61,6 +61,7 @@ profile 继承 base 系统提示词，包括 `You are an AI agent powered by Dee
 <a id="known-limitations-and-deferred-work"></a>
 
 - **没有图形客户端**：文件卡片、本地文件打开和浏览器状态需要嵌入客户端；SDK 不启动 Web server。
+- **用户时区未知**：SDK 协议不携带用户时区，因此时间上下文显示 `Browser time zone for this request: unavailable.`。进程或容器的时区可能与用户时区不同。`time-context.timeZone` 配置只控制回退时间戳的显示格式，不能据此确定用户时区。自动检测和 SDK 时区传参暂缓支持。
 - **提问需要回答方**：在 TypeScript 中配置 `onUserQuestion`、在 Python 中配置 `on_user_question`，或提供原生 `user-questions/request` handler；否则 `ask_user_question` 返回 `NO_PROVIDER`。
 - **定时任务依赖运行时生命周期**：投递需要运行中的进程及其持久化 Session 存储。
 - **profile 可能省略 SDK server**：TypeScript client 选择的自定义 profile 必须保留本组合包或另一个 `dsh-sdk-jsonrpc-server` 配置项；没有 peer 响应时，client 初始化会失败。