chore: release v2.0.0

CHANGELOG.md

@@ -6,16 +6,33 @@ This file records the notable changes in each dsh-im release. Its format follows
 
 ## [Unreleased]
 
+## [2.0.0] - 2026-08-24
+
 ### Added / 新增
 
+- Discord 服务器文字和公告频道首次 @ 机器人后会创建原生 Thread；后续消息、流式回答和结果文件都留在该 Thread，并在重启、事件重放和并发创建时保持同一会话。
+  The first bot mention in a Discord server text or announcement channel now creates a native Thread; follow-up messages, streamed replies, and result files stay in that Thread, with stable routing across restarts, event replays, and concurrent creation attempts.
+- Telegram 新增原生 Rich Message：私聊使用可更新 Draft 并持久化唯一最终消息，群聊和 Topic 原位完成占位消息，同时保留 Markdown 结构、长内容拆分和确定性纯文本降级。
+  Added native Telegram Rich Messages: private chats update a Draft and persist one final message, while groups and Topics finalize their placeholder in place, preserving Markdown structure, long-content splitting, and deterministic plain-text fallback.
 - 新增机器人聊天消息的英文支持：Host 配置 `language: en`（或环境变量 `DSH_IM_LANGUAGE=en`）后，各渠道发送给用户的提示、命令帮助和交互消息会切换为英文；未设置或未收录的文案仍以中文原样输出，不影响现有中文用户。
   Added English support for bot chat messages: with `language: en` in the Host config (or the `DSH_IM_LANGUAGE=en` environment variable), prompts, command help, and interaction messages sent by every channel switch to English; unset or untranslated text is still sent verbatim in Chinese, so existing Chinese users are unaffected.
 
 ### Changed / 变更
 
+- **重大变更：** Discord 服务器父频道中的任务现在默认迁移到机器人创建的 Public Thread。部署方需要启用 **Message Content Intent**，并授予 **Create Public Threads**、**Send Messages in Threads**、**Send Messages** 和 **Read Message History**；文件交付还需要 **Attach Files**。
+  **Breaking:** Discord tasks started in server parent channels now move into bot-created Public Threads by default. Deployments must enable **Message Content Intent** and grant **Create Public Threads**, **Send Messages in Threads**, **Send Messages**, and **Read Message History**; file delivery also requires **Attach Files**.
+- Harness 助手增量和最终回答现在保留 Markdown 呈现意图，Telegram 交付回执会记录 Rich、纯文本降级、失败或不确定终态，并避免重复最终消息。
+  Harness assistant updates and final replies now preserve Markdown presentation intent; Telegram delivery receipts record Rich delivery, plain-text fallback, failure, or uncertain terminal outcomes without duplicating final messages.
 - 统一各渠道共用的英文文案到共享词典，消除同名键在不同渠道词典中的重复定义。
   Consolidated English copy shared across channels into the shared dictionaries, removing duplicate keys that were defined in multiple channel dictionaries.
 
+### Fixed / 修复
+
+- 最终文本交付明确失败时会向渠道上层报告安全错误，同时仍然完成已登记结果文件的交付，不会重复运行 Prompt。
+  Definite final-text delivery failures now surface a safe channel-level error while registered result files still settle, without rerunning the Prompt.
+- 收紧 Host 语言值识别并修复 Discord、Slack、Telegram 等渠道的英文消息边界，未知语言继续可靠回退为中文。
+  Hardened Host language-value recognition and English-message handling in Discord, Slack, Telegram, and other channels, while unknown languages continue to fall back reliably to Chinese.
+
 ## [1.5.0] - 2026-08-24
 
 ### Added / 新增
@@ -222,7 +239,8 @@ This file records the notable changes in each dsh-im release. Its format follows
 - 改进 npm 发布包结构，保留 CLI 入口并避免安装脚本拦截。
   Improved npm package contents to preserve the CLI entry point and avoid install-script blocking.
 
-[Unreleased]: https://github.com/xmanrui/dsh-im/compare/v1.5.0...HEAD
+[Unreleased]: https://github.com/xmanrui/dsh-im/compare/v2.0.0...HEAD
+[2.0.0]: https://github.com/xmanrui/dsh-im/compare/v1.5.0...v2.0.0
 [1.5.0]: https://github.com/xmanrui/dsh-im/compare/v1.4.0...v1.5.0
 [1.4.0]: https://github.com/xmanrui/dsh-im/compare/v1.3.0...v1.4.0
 [1.3.0]: https://github.com/xmanrui/dsh-im/compare/v1.2.0...v1.3.0